./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe012_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:06:36,077 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:06:36,151 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:06:36,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:06:36,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:06:36,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:06:36,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:06:36,185 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:06:36,186 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:06:36,188 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:06:36,189 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:06:36,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:06:36,189 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:06:36,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:06:36,190 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:06:36,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:06:36,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:06:36,191 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:06:36,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:06:36,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:06:36,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:06:36,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:06:36,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:06:36,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:06:36,193 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:06:36,193 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:06:36,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:06:36,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:06:36,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:06:36,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:06:36,195 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:06:36,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:06:36,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:36,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:06:36,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:06:36,196 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:06:36,196 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:06:36,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:06:36,197 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:06:36,197 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:06:36,197 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:06:36,197 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:06:36,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:06:36,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:06:36,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:06:36,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:06:36,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:06:36,452 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:06:36,453 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:06:36,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 13:06:37,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:06:37,620 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:06:37,621 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 13:06:37,631 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298a7c259/d25a1caf5e5246d790b48691e52d46b9/FLAGf6c997903 [2024-06-14 13:06:37,648 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/298a7c259/d25a1caf5e5246d790b48691e52d46b9 [2024-06-14 13:06:37,650 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:06:37,650 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:06:37,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 13:06:37,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:06:37,785 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:06:37,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:37,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:06:37,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:06:37,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:37" (1/2) ... [2024-06-14 13:06:37,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7509ce33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:37, skipping insertion in model container [2024-06-14 13:06:37,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:37" (1/2) ... [2024-06-14 13:06:37,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5101eda2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:37, skipping insertion in model container [2024-06-14 13:06:37,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:37" (2/2) ... [2024-06-14 13:06:37,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7509ce33 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:37, skipping insertion in model container [2024-06-14 13:06:37,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:37" (2/2) ... [2024-06-14 13:06:37,794 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:06:37,866 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:06:37,868 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:06:37,868 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:06:37,868 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 13:06:37,868 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:06:37,868 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-14 13:06:37,907 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:06:38,155 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:38,164 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:06:38,322 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:38,355 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:06:38,356 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38 WrapperNode [2024-06-14 13:06:38,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:38,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:38,358 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:06:38,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:06:38,364 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 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,393 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 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,419 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-14 13:06:38,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:38,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:06:38,420 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:06:38,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:06:38,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,456 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]. [2024-06-14 13:06:38,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:06:38,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:06:38,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:06:38,490 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:06:38,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (1/1) ... [2024-06-14 13:06:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:38,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:06:38,526 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) [2024-06-14 13:06:38,555 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 [2024-06-14 13:06:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:06:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:06:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:06:38,571 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:06:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:06:38,571 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:06:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:06:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:06:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:06:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:06:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:06:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:06:38,574 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:06:38,672 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:06:38,674 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:06:39,045 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:06:39,046 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:06:39,176 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:06:39,176 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:06:39,177 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:39 BoogieIcfgContainer [2024-06-14 13:06:39,177 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:06:39,179 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:06:39,179 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:06:39,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:06:39,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:06:37" (1/4) ... [2024-06-14 13:06:39,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fea263b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:06:39, skipping insertion in model container [2024-06-14 13:06:39,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:37" (2/4) ... [2024-06-14 13:06:39,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fea263b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:39, skipping insertion in model container [2024-06-14 13:06:39,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:38" (3/4) ... [2024-06-14 13:06:39,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fea263b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:39, skipping insertion in model container [2024-06-14 13:06:39,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:39" (4/4) ... [2024-06-14 13:06:39,185 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 13:06:39,198 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:06:39,198 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:06:39,198 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:06:39,237 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:06:39,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:06:39,289 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:06:39,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:39,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:06:39,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:06:39,294 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:06:39,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:06:39,311 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;@62acbd63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:06:39,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:06:39,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:06:39,318 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:06:39,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:39,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:06:39,319 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)] === [2024-06-14 13:06:39,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1642983866, now seen corresponding path program 1 times [2024-06-14 13:06:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619265266] [2024-06-14 13:06:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:39,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:40,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619265266] [2024-06-14 13:06:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619265266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:40,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:06:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266846626] [2024-06-14 13:06:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:40,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:06:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:06:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:06:40,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 13:06:40,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:40,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 13:06:40,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:40,521 INFO L124 PetriNetUnfolderBase]: 891/1369 cut-off events. [2024-06-14 13:06:40,521 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-14 13:06:40,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 1369 events. 891/1369 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6481 event pairs, 520 based on Foata normal form. 2/1341 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-14 13:06:40,536 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 13:06:40,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 175 flow [2024-06-14 13:06:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:06:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:06:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-14 13:06:40,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 13:06:40,547 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 76 transitions. [2024-06-14 13:06:40,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 175 flow [2024-06-14 13:06:40,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:40,553 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:06:40,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:06:40,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:06:40,557 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:06:40,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:40,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:40,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:06:40,558 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)] === [2024-06-14 13:06:40,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1002044048, now seen corresponding path program 1 times [2024-06-14 13:06:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:40,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297591211] [2024-06-14 13:06:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:41,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:41,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297591211] [2024-06-14 13:06:41,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297591211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:41,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:41,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:41,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855150438] [2024-06-14 13:06:41,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:41,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-14 13:06:41,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 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) [2024-06-14 13:06:41,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:41,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-14 13:06:41,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:42,115 INFO L124 PetriNetUnfolderBase]: 1131/1722 cut-off events. [2024-06-14 13:06:42,115 INFO L125 PetriNetUnfolderBase]: For 341/355 co-relation queries the response was YES. [2024-06-14 13:06:42,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1722 events. 1131/1722 cut-off events. For 341/355 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 589 based on Foata normal form. 13/1729 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-14 13:06:42,125 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-14 13:06:42,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 228 flow [2024-06-14 13:06:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:06:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:06:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 13:06:42,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:06:42,129 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 92 transitions. [2024-06-14 13:06:42,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 228 flow [2024-06-14 13:06:42,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:42,132 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-14 13:06:42,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-14 13:06:42,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-14 13:06:42,133 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-14 13:06:42,134 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) [2024-06-14 13:06:42,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:42,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:06:42,136 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)] === [2024-06-14 13:06:42,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -813912086, now seen corresponding path program 1 times [2024-06-14 13:06:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225597632] [2024-06-14 13:06:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:42,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225597632] [2024-06-14 13:06:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225597632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757845254] [2024-06-14 13:06:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:42,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:42,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-14 13:06:42,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:42,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:42,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-14 13:06:42,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:43,131 INFO L124 PetriNetUnfolderBase]: 888/1372 cut-off events. [2024-06-14 13:06:43,132 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-14 13:06:43,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 1372 events. 888/1372 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6425 event pairs, 408 based on Foata normal form. 6/1375 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-14 13:06:43,137 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-14 13:06:43,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 275 flow [2024-06-14 13:06:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-14 13:06:43,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 13:06:43,141 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 100 transitions. [2024-06-14 13:06:43,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 275 flow [2024-06-14 13:06:43,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:43,144 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-14 13:06:43,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-14 13:06:43,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-14 13:06:43,145 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-14 13:06:43,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:43,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:06:43,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:43,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash 538530464, now seen corresponding path program 1 times [2024-06-14 13:06:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:43,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629671001] [2024-06-14 13:06:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:43,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:43,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:43,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629671001] [2024-06-14 13:06:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629671001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:43,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:43,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241879016] [2024-06-14 13:06:43,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:43,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:43,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:43,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:43,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 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) [2024-06-14 13:06:43,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:43,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:43,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:44,219 INFO L124 PetriNetUnfolderBase]: 1047/1602 cut-off events. [2024-06-14 13:06:44,219 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-14 13:06:44,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4596 conditions, 1602 events. 1047/1602 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7557 event pairs, 479 based on Foata normal form. 4/1603 useless extension candidates. Maximal degree in co-relation 4576. Up to 1534 conditions per place. [2024-06-14 13:06:44,227 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-14 13:06:44,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 383 flow [2024-06-14 13:06:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:06:44,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 13:06:44,229 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:06:44,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 383 flow [2024-06-14 13:06:44,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:44,232 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 244 flow [2024-06-14 13:06:44,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-14 13:06:44,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-14 13:06:44,232 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 244 flow [2024-06-14 13:06:44,233 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) [2024-06-14 13:06:44,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:06:44,233 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)] === [2024-06-14 13:06:44,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1538237355, now seen corresponding path program 1 times [2024-06-14 13:06:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404628000] [2024-06-14 13:06:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404628000] [2024-06-14 13:06:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404628000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:45,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531973197] [2024-06-14 13:06:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:45,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:45,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 244 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) [2024-06-14 13:06:45,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:45,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:45,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:45,718 INFO L124 PetriNetUnfolderBase]: 1053/1611 cut-off events. [2024-06-14 13:06:45,718 INFO L125 PetriNetUnfolderBase]: For 2521/2521 co-relation queries the response was YES. [2024-06-14 13:06:45,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5104 conditions, 1611 events. 1053/1611 cut-off events. For 2521/2521 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7666 event pairs, 461 based on Foata normal form. 4/1612 useless extension candidates. Maximal degree in co-relation 5080. Up to 1525 conditions per place. [2024-06-14 13:06:45,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 56 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-14 13:06:45,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 460 flow [2024-06-14 13:06:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:06:45,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 13:06:45,730 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 244 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:06:45,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 460 flow [2024-06-14 13:06:45,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 454 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:45,733 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 303 flow [2024-06-14 13:06:45,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 13:06:45,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 13:06:45,734 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 303 flow [2024-06-14 13:06:45,734 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) [2024-06-14 13:06:45,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:45,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:06:45,735 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)] === [2024-06-14 13:06:45,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2125064731, now seen corresponding path program 1 times [2024-06-14 13:06:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362870451] [2024-06-14 13:06:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:46,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362870451] [2024-06-14 13:06:46,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362870451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:46,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:46,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301160586] [2024-06-14 13:06:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:46,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:46,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 303 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) [2024-06-14 13:06:46,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:46,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:46,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:46,999 INFO L124 PetriNetUnfolderBase]: 1276/1946 cut-off events. [2024-06-14 13:06:46,999 INFO L125 PetriNetUnfolderBase]: For 4880/4917 co-relation queries the response was YES. [2024-06-14 13:06:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6773 conditions, 1946 events. 1276/1946 cut-off events. For 4880/4917 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9256 event pairs, 452 based on Foata normal form. 15/1911 useless extension candidates. Maximal degree in co-relation 6746. Up to 1793 conditions per place. [2024-06-14 13:06:47,010 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-14 13:06:47,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 489 flow [2024-06-14 13:06:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-14 13:06:47,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-14 13:06:47,012 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 303 flow. Second operand 5 states and 99 transitions. [2024-06-14 13:06:47,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 489 flow [2024-06-14 13:06:47,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 454 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:47,017 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 343 flow [2024-06-14 13:06:47,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-14 13:06:47,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 13:06:47,018 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 343 flow [2024-06-14 13:06:47,018 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) [2024-06-14 13:06:47,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:47,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:06:47,018 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)] === [2024-06-14 13:06:47,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2131744735, now seen corresponding path program 1 times [2024-06-14 13:06:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:47,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337114764] [2024-06-14 13:06:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:47,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337114764] [2024-06-14 13:06:47,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337114764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:47,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:47,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:47,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14646457] [2024-06-14 13:06:47,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:47,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:47,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:47,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:47,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 343 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) [2024-06-14 13:06:47,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:47,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:47,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:48,361 INFO L124 PetriNetUnfolderBase]: 1112/1713 cut-off events. [2024-06-14 13:06:48,362 INFO L125 PetriNetUnfolderBase]: For 5598/5598 co-relation queries the response was YES. [2024-06-14 13:06:48,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6380 conditions, 1713 events. 1112/1713 cut-off events. For 5598/5598 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8341 event pairs, 435 based on Foata normal form. 24/1734 useless extension candidates. Maximal degree in co-relation 6352. Up to 1489 conditions per place. [2024-06-14 13:06:48,372 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 68 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-14 13:06:48,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 619 flow [2024-06-14 13:06:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:06:48,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-14 13:06:48,374 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 343 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:06:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 619 flow [2024-06-14 13:06:48,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 578 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:48,378 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 363 flow [2024-06-14 13:06:48,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-14 13:06:48,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-14 13:06:48,379 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 363 flow [2024-06-14 13:06:48,379 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) [2024-06-14 13:06:48,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:48,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:48,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:06:48,380 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)] === [2024-06-14 13:06:48,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1676523471, now seen corresponding path program 1 times [2024-06-14 13:06:48,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:48,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830945631] [2024-06-14 13:06:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:48,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:49,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830945631] [2024-06-14 13:06:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830945631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:49,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:49,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:49,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789994814] [2024-06-14 13:06:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:49,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:49,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:06:49,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:49,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:49,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:06:49,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:49,852 INFO L124 PetriNetUnfolderBase]: 1372/2090 cut-off events. [2024-06-14 13:06:49,852 INFO L125 PetriNetUnfolderBase]: For 5728/5732 co-relation queries the response was YES. [2024-06-14 13:06:49,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 2090 events. 1372/2090 cut-off events. For 5728/5732 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9904 event pairs, 477 based on Foata normal form. 3/2088 useless extension candidates. Maximal degree in co-relation 7493. Up to 1948 conditions per place. [2024-06-14 13:06:49,865 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-14 13:06:49,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 659 flow [2024-06-14 13:06:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:06:49,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-14 13:06:49,867 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 363 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:06:49,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 659 flow [2024-06-14 13:06:49,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 626 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:49,871 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 474 flow [2024-06-14 13:06:49,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 13:06:49,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 13:06:49,872 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 474 flow [2024-06-14 13:06:49,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:49,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:49,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:49,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:06:49,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:49,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1183686085, now seen corresponding path program 1 times [2024-06-14 13:06:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:49,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616668124] [2024-06-14 13:06:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:50,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616668124] [2024-06-14 13:06:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616668124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:50,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311463257] [2024-06-14 13:06:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:50,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:06:50,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:50,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:06:50,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:50,902 INFO L124 PetriNetUnfolderBase]: 1366/2088 cut-off events. [2024-06-14 13:06:50,903 INFO L125 PetriNetUnfolderBase]: For 7246/7246 co-relation queries the response was YES. [2024-06-14 13:06:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7984 conditions, 2088 events. 1366/2088 cut-off events. For 7246/7246 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9913 event pairs, 469 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 7952. Up to 2048 conditions per place. [2024-06-14 13:06:50,917 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 73 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-06-14 13:06:50,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 716 flow [2024-06-14 13:06:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 13:06:50,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-14 13:06:50,918 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 474 flow. Second operand 5 states and 89 transitions. [2024-06-14 13:06:50,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 716 flow [2024-06-14 13:06:50,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 86 transitions, 696 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:50,925 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 543 flow [2024-06-14 13:06:50,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-14 13:06:50,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-14 13:06:50,926 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 543 flow [2024-06-14 13:06:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:50,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:06:50,927 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)] === [2024-06-14 13:06:50,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1401069320, now seen corresponding path program 1 times [2024-06-14 13:06:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:50,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419239884] [2024-06-14 13:06:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:50,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:51,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419239884] [2024-06-14 13:06:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419239884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:51,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953469006] [2024-06-14 13:06:51,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:52,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:52,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 543 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) [2024-06-14 13:06:52,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:52,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:52,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:52,587 INFO L124 PetriNetUnfolderBase]: 1381/2138 cut-off events. [2024-06-14 13:06:52,588 INFO L125 PetriNetUnfolderBase]: For 7921/7967 co-relation queries the response was YES. [2024-06-14 13:06:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8280 conditions, 2138 events. 1381/2138 cut-off events. For 7921/7967 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10543 event pairs, 426 based on Foata normal form. 15/2103 useless extension candidates. Maximal degree in co-relation 8244. Up to 1941 conditions per place. [2024-06-14 13:06:52,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 78 selfloop transitions, 30 changer transitions 0/121 dead transitions. [2024-06-14 13:06:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 974 flow [2024-06-14 13:06:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:06:52,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:06:52,608 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 543 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:06:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 974 flow [2024-06-14 13:06:52,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 968 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:52,633 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 782 flow [2024-06-14 13:06:52,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=782, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-14 13:06:52,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-14 13:06:52,634 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 782 flow [2024-06-14 13:06:52,634 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) [2024-06-14 13:06:52,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:52,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:52,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:06:52,635 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)] === [2024-06-14 13:06:52,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash 886855044, now seen corresponding path program 2 times [2024-06-14 13:06:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:52,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934221709] [2024-06-14 13:06:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:53,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934221709] [2024-06-14 13:06:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934221709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497261738] [2024-06-14 13:06:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:53,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:53,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 782 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) [2024-06-14 13:06:53,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:53,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:53,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:54,079 INFO L124 PetriNetUnfolderBase]: 1392/2159 cut-off events. [2024-06-14 13:06:54,079 INFO L125 PetriNetUnfolderBase]: For 10134/10209 co-relation queries the response was YES. [2024-06-14 13:06:54,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8912 conditions, 2159 events. 1392/2159 cut-off events. For 10134/10209 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10594 event pairs, 323 based on Foata normal form. 25/2123 useless extension candidates. Maximal degree in co-relation 8869. Up to 1902 conditions per place. [2024-06-14 13:06:54,096 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-14 13:06:54,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 1034 flow [2024-06-14 13:06:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:06:54,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 13:06:54,098 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 782 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:06:54,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 1034 flow [2024-06-14 13:06:54,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 111 transitions, 969 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:54,106 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 807 flow [2024-06-14 13:06:54,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=807, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-14 13:06:54,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 13:06:54,107 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 807 flow [2024-06-14 13:06:54,107 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) [2024-06-14 13:06:54,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:54,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:54,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:06:54,108 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)] === [2024-06-14 13:06:54,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1295660676, now seen corresponding path program 3 times [2024-06-14 13:06:54,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:54,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154491146] [2024-06-14 13:06:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:54,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:55,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154491146] [2024-06-14 13:06:55,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154491146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:55,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:55,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670804947] [2024-06-14 13:06:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:55,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:06:55,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 807 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) [2024-06-14 13:06:55,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:55,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:06:55,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:55,568 INFO L124 PetriNetUnfolderBase]: 1375/2131 cut-off events. [2024-06-14 13:06:55,569 INFO L125 PetriNetUnfolderBase]: For 11809/11903 co-relation queries the response was YES. [2024-06-14 13:06:55,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9122 conditions, 2131 events. 1375/2131 cut-off events. For 11809/11903 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10488 event pairs, 401 based on Foata normal form. 16/2093 useless extension candidates. Maximal degree in co-relation 9078. Up to 1893 conditions per place. [2024-06-14 13:06:55,582 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 34 changer transitions 0/114 dead transitions. [2024-06-14 13:06:55,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1079 flow [2024-06-14 13:06:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:06:55,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 13:06:55,584 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 807 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:06:55,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1079 flow [2024-06-14 13:06:55,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1005 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:55,593 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 835 flow [2024-06-14 13:06:55,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=835, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-14 13:06:55,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 13:06:55,594 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 835 flow [2024-06-14 13:06:55,594 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) [2024-06-14 13:06:55,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:55,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:06:55,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:55,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1295655716, now seen corresponding path program 1 times [2024-06-14 13:06:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:55,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703389210] [2024-06-14 13:06:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:56,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703389210] [2024-06-14 13:06:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703389210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:56,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:56,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677455655] [2024-06-14 13:06:56,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:56,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:56,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:56,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:56,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:06:56,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 835 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:56,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:06:56,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:57,396 INFO L124 PetriNetUnfolderBase]: 1529/2350 cut-off events. [2024-06-14 13:06:57,396 INFO L125 PetriNetUnfolderBase]: For 11001/11005 co-relation queries the response was YES. [2024-06-14 13:06:57,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10043 conditions, 2350 events. 1529/2350 cut-off events. For 11001/11005 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11266 event pairs, 437 based on Foata normal form. 6/2354 useless extension candidates. Maximal degree in co-relation 9998. Up to 2214 conditions per place. [2024-06-14 13:06:57,409 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 113 selfloop transitions, 38 changer transitions 0/155 dead transitions. [2024-06-14 13:06:57,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 155 transitions, 1475 flow [2024-06-14 13:06:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 13:06:57,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-14 13:06:57,411 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 835 flow. Second operand 10 states and 178 transitions. [2024-06-14 13:06:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 155 transitions, 1475 flow [2024-06-14 13:06:57,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 155 transitions, 1384 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:57,425 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1142 flow [2024-06-14 13:06:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1142, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-14 13:06:57,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 13:06:57,426 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1142 flow [2024-06-14 13:06:57,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:57,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:57,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:57,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:06:57,426 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)] === [2024-06-14 13:06:57,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1398207400, now seen corresponding path program 2 times [2024-06-14 13:06:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:57,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120913735] [2024-06-14 13:06:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:58,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120913735] [2024-06-14 13:06:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120913735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:58,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:58,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049140117] [2024-06-14 13:06:58,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:58,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:06:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1142 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:58,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:06:58,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:58,989 INFO L124 PetriNetUnfolderBase]: 1540/2369 cut-off events. [2024-06-14 13:06:58,989 INFO L125 PetriNetUnfolderBase]: For 13150/13152 co-relation queries the response was YES. [2024-06-14 13:06:58,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10719 conditions, 2369 events. 1540/2369 cut-off events. For 13150/13152 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11363 event pairs, 438 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 10668. Up to 2118 conditions per place. [2024-06-14 13:06:59,004 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 100 selfloop transitions, 50 changer transitions 0/154 dead transitions. [2024-06-14 13:06:59,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1602 flow [2024-06-14 13:06:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:06:59,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 13:06:59,006 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1142 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:06:59,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1602 flow [2024-06-14 13:06:59,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1505 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:59,024 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1305 flow [2024-06-14 13:06:59,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1305, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-14 13:06:59,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 13:06:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1305 flow [2024-06-14 13:06:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:59,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:59,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:59,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:06:59,026 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)] === [2024-06-14 13:06:59,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1755768958, now seen corresponding path program 3 times [2024-06-14 13:06:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:59,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435585477] [2024-06-14 13:06:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:59,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435585477] [2024-06-14 13:07:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435585477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833619575] [2024-06-14 13:07:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:00,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:00,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:00,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:00,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:00,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:00,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:01,033 INFO L124 PetriNetUnfolderBase]: 1546/2381 cut-off events. [2024-06-14 13:07:01,033 INFO L125 PetriNetUnfolderBase]: For 15865/15874 co-relation queries the response was YES. [2024-06-14 13:07:01,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 2381 events. 1546/2381 cut-off events. For 15865/15874 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11552 event pairs, 426 based on Foata normal form. 8/2384 useless extension candidates. Maximal degree in co-relation 11407. Up to 2180 conditions per place. [2024-06-14 13:07:01,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 130 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-14 13:07:01,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 170 transitions, 1809 flow [2024-06-14 13:07:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:07:01,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:07:01,051 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1305 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:07:01,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 170 transitions, 1809 flow [2024-06-14 13:07:01,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 170 transitions, 1697 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:01,075 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1345 flow [2024-06-14 13:07:01,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1345, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-14 13:07:01,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 13:07:01,076 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1345 flow [2024-06-14 13:07:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:01,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:01,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:01,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:07:01,077 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)] === [2024-06-14 13:07:01,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -690512720, now seen corresponding path program 1 times [2024-06-14 13:07:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:01,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343976993] [2024-06-14 13:07:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:02,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:02,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343976993] [2024-06-14 13:07:02,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343976993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:02,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:02,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694253624] [2024-06-14 13:07:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:02,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1345 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:02,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:02,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:02,678 INFO L124 PetriNetUnfolderBase]: 1588/2444 cut-off events. [2024-06-14 13:07:02,678 INFO L125 PetriNetUnfolderBase]: For 16219/16221 co-relation queries the response was YES. [2024-06-14 13:07:02,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11744 conditions, 2444 events. 1588/2444 cut-off events. For 16219/16221 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11899 event pairs, 391 based on Foata normal form. 4/2439 useless extension candidates. Maximal degree in co-relation 11688. Up to 2104 conditions per place. [2024-06-14 13:07:02,692 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-06-14 13:07:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1823 flow [2024-06-14 13:07:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:07:02,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 13:07:02,694 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1345 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:07:02,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1823 flow [2024-06-14 13:07:02,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 1731 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:02,715 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1421 flow [2024-06-14 13:07:02,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-14 13:07:02,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:07:02,716 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1421 flow [2024-06-14 13:07:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:07:02,716 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)] === [2024-06-14 13:07:02,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1578879214, now seen corresponding path program 2 times [2024-06-14 13:07:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217431989] [2024-06-14 13:07:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217431989] [2024-06-14 13:07:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217431989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:03,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:03,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788116195] [2024-06-14 13:07:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:03,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1421 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:03,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:03,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:03,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:04,359 INFO L124 PetriNetUnfolderBase]: 1580/2432 cut-off events. [2024-06-14 13:07:04,359 INFO L125 PetriNetUnfolderBase]: For 18314/18316 co-relation queries the response was YES. [2024-06-14 13:07:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12074 conditions, 2432 events. 1580/2432 cut-off events. For 18314/18316 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11768 event pairs, 403 based on Foata normal form. 4/2427 useless extension candidates. Maximal degree in co-relation 12016. Up to 2149 conditions per place. [2024-06-14 13:07:04,374 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-06-14 13:07:04,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1826 flow [2024-06-14 13:07:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:07:04,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 13:07:04,376 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1421 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:07:04,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1826 flow [2024-06-14 13:07:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 167 transitions, 1704 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:04,401 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1429 flow [2024-06-14 13:07:04,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1429, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-14 13:07:04,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 13:07:04,402 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1429 flow [2024-06-14 13:07:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:04,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:04,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:07:04,403 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)] === [2024-06-14 13:07:04,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:04,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1667592844, now seen corresponding path program 3 times [2024-06-14 13:07:04,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:04,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137613957] [2024-06-14 13:07:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:04,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:05,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137613957] [2024-06-14 13:07:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137613957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:05,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069504298] [2024-06-14 13:07:05,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:05,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:05,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:05,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1429 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:05,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:05,938 INFO L124 PetriNetUnfolderBase]: 1572/2420 cut-off events. [2024-06-14 13:07:05,938 INFO L125 PetriNetUnfolderBase]: For 19558/19560 co-relation queries the response was YES. [2024-06-14 13:07:05,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12094 conditions, 2420 events. 1572/2420 cut-off events. For 19558/19560 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11685 event pairs, 265 based on Foata normal form. 4/2415 useless extension candidates. Maximal degree in co-relation 12035. Up to 2168 conditions per place. [2024-06-14 13:07:05,952 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 140 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-14 13:07:05,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 175 transitions, 1903 flow [2024-06-14 13:07:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:07:05,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 13:07:05,954 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1429 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:07:05,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 175 transitions, 1903 flow [2024-06-14 13:07:05,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1808 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:05,979 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1502 flow [2024-06-14 13:07:05,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1502, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-14 13:07:05,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 13:07:05,980 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1502 flow [2024-06-14 13:07:05,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:05,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:05,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:07:05,981 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:05,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:05,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1578873262, now seen corresponding path program 1 times [2024-06-14 13:07:05,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:05,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056544954] [2024-06-14 13:07:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:05,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056544954] [2024-06-14 13:07:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056544954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686521036] [2024-06-14 13:07:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:07,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:07,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:07,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:07,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:07,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1502 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:07,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:07,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:07,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:07,976 INFO L124 PetriNetUnfolderBase]: 1630/2528 cut-off events. [2024-06-14 13:07:07,976 INFO L125 PetriNetUnfolderBase]: For 23334/23336 co-relation queries the response was YES. [2024-06-14 13:07:07,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12802 conditions, 2528 events. 1630/2528 cut-off events. For 23334/23336 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12520 event pairs, 354 based on Foata normal form. 16/2535 useless extension candidates. Maximal degree in co-relation 12740. Up to 2119 conditions per place. [2024-06-14 13:07:07,991 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 129 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2024-06-14 13:07:07,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 186 transitions, 1996 flow [2024-06-14 13:07:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:07:07,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 13:07:07,992 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1502 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:07:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 186 transitions, 1996 flow [2024-06-14 13:07:08,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 186 transitions, 1938 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:07:08,027 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1588 flow [2024-06-14 13:07:08,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1588, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-06-14 13:07:08,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-14 13:07:08,028 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1588 flow [2024-06-14 13:07:08,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:08,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:08,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:07:08,029 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)] === [2024-06-14 13:07:08,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2000724638, now seen corresponding path program 2 times [2024-06-14 13:07:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148337973] [2024-06-14 13:07:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:08,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:09,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148337973] [2024-06-14 13:07:09,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148337973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:09,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:09,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994738566] [2024-06-14 13:07:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:09,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:09,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:09,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:09,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:09,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1588 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:09,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:09,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:09,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:09,963 INFO L124 PetriNetUnfolderBase]: 1732/2705 cut-off events. [2024-06-14 13:07:09,963 INFO L125 PetriNetUnfolderBase]: For 26544/26553 co-relation queries the response was YES. [2024-06-14 13:07:09,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2705 events. 1732/2705 cut-off events. For 26544/26553 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13677 event pairs, 377 based on Foata normal form. 18/2718 useless extension candidates. Maximal degree in co-relation 13967. Up to 2126 conditions per place. [2024-06-14 13:07:09,981 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 40 changer transitions 0/200 dead transitions. [2024-06-14 13:07:09,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 200 transitions, 2235 flow [2024-06-14 13:07:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:07:09,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-14 13:07:09,983 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1588 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:07:09,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 200 transitions, 2235 flow [2024-06-14 13:07:10,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 200 transitions, 2131 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:10,026 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1604 flow [2024-06-14 13:07:10,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1604, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-14 13:07:10,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-14 13:07:10,027 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1604 flow [2024-06-14 13:07:10,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:10,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:10,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:10,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:07:10,027 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)] === [2024-06-14 13:07:10,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 646888032, now seen corresponding path program 3 times [2024-06-14 13:07:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:10,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147646620] [2024-06-14 13:07:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:10,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:11,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147646620] [2024-06-14 13:07:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147646620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:11,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817197414] [2024-06-14 13:07:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:11,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:11,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:11,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:11,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1604 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:11,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:11,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:11,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:11,788 INFO L124 PetriNetUnfolderBase]: 1704/2658 cut-off events. [2024-06-14 13:07:11,788 INFO L125 PetriNetUnfolderBase]: For 28218/28220 co-relation queries the response was YES. [2024-06-14 13:07:11,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 2658 events. 1704/2658 cut-off events. For 28218/28220 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13323 event pairs, 424 based on Foata normal form. 16/2665 useless extension candidates. Maximal degree in co-relation 13687. Up to 2255 conditions per place. [2024-06-14 13:07:11,804 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 64 changer transitions 0/191 dead transitions. [2024-06-14 13:07:11,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 191 transitions, 2094 flow [2024-06-14 13:07:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:07:11,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:07:11,805 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1604 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:07:11,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 191 transitions, 2094 flow [2024-06-14 13:07:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2040 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:11,836 INFO L231 Difference]: Finished difference. Result has 133 places, 158 transitions, 1685 flow [2024-06-14 13:07:11,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1685, PETRI_PLACES=133, PETRI_TRANSITIONS=158} [2024-06-14 13:07:11,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 13:07:11,837 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 158 transitions, 1685 flow [2024-06-14 13:07:11,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:11,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:11,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:07:11,838 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:11,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2117327876, now seen corresponding path program 1 times [2024-06-14 13:07:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:11,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656716668] [2024-06-14 13:07:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656716668] [2024-06-14 13:07:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656716668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:12,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963781284] [2024-06-14 13:07:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:12,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:12,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 158 transitions, 1685 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:12,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:12,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:12,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:12,972 INFO L124 PetriNetUnfolderBase]: 1724/2690 cut-off events. [2024-06-14 13:07:12,972 INFO L125 PetriNetUnfolderBase]: For 29526/29528 co-relation queries the response was YES. [2024-06-14 13:07:12,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14209 conditions, 2690 events. 1724/2690 cut-off events. For 29526/29528 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13548 event pairs, 427 based on Foata normal form. 4/2685 useless extension candidates. Maximal degree in co-relation 14142. Up to 2512 conditions per place. [2024-06-14 13:07:12,991 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-14 13:07:12,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 170 transitions, 2075 flow [2024-06-14 13:07:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:07:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:07:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 13:07:12,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-14 13:07:12,993 INFO L175 Difference]: Start difference. First operand has 133 places, 158 transitions, 1685 flow. Second operand 5 states and 93 transitions. [2024-06-14 13:07:12,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 170 transitions, 2075 flow [2024-06-14 13:07:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 170 transitions, 1932 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:13,035 INFO L231 Difference]: Finished difference. Result has 130 places, 161 transitions, 1657 flow [2024-06-14 13:07:13,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1657, PETRI_PLACES=130, PETRI_TRANSITIONS=161} [2024-06-14 13:07:13,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 13:07:13,035 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 161 transitions, 1657 flow [2024-06-14 13:07:13,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:13,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:13,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:13,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:07:13,036 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)] === [2024-06-14 13:07:13,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 198965240, now seen corresponding path program 2 times [2024-06-14 13:07:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:13,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101286569] [2024-06-14 13:07:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:13,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101286569] [2024-06-14 13:07:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101286569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971347432] [2024-06-14 13:07:13,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:13,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:13,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 161 transitions, 1657 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:13,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:13,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:13,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:14,226 INFO L124 PetriNetUnfolderBase]: 1712/2674 cut-off events. [2024-06-14 13:07:14,227 INFO L125 PetriNetUnfolderBase]: For 31092/31094 co-relation queries the response was YES. [2024-06-14 13:07:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14258 conditions, 2674 events. 1712/2674 cut-off events. For 31092/31094 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13496 event pairs, 425 based on Foata normal form. 4/2669 useless extension candidates. Maximal degree in co-relation 14190. Up to 2480 conditions per place. [2024-06-14 13:07:14,245 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-14 13:07:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 176 transitions, 2079 flow [2024-06-14 13:07:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:07:14,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:07:14,246 INFO L175 Difference]: Start difference. First operand has 130 places, 161 transitions, 1657 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:07:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 176 transitions, 2079 flow [2024-06-14 13:07:14,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 176 transitions, 1996 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:14,286 INFO L231 Difference]: Finished difference. Result has 133 places, 164 transitions, 1694 flow [2024-06-14 13:07:14,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1694, PETRI_PLACES=133, PETRI_TRANSITIONS=164} [2024-06-14 13:07:14,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 13:07:14,287 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 164 transitions, 1694 flow [2024-06-14 13:07:14,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:14,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:14,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:14,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:07:14,287 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:14,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash -955240478, now seen corresponding path program 1 times [2024-06-14 13:07:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:14,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904848885] [2024-06-14 13:07:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:14,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:14,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904848885] [2024-06-14 13:07:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904848885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:14,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462726541] [2024-06-14 13:07:14,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:14,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:14,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 164 transitions, 1694 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) [2024-06-14 13:07:14,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:14,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:14,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:15,399 INFO L124 PetriNetUnfolderBase]: 1625/2589 cut-off events. [2024-06-14 13:07:15,399 INFO L125 PetriNetUnfolderBase]: For 31840/31851 co-relation queries the response was YES. [2024-06-14 13:07:15,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14182 conditions, 2589 events. 1625/2589 cut-off events. For 31840/31851 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13226 event pairs, 406 based on Foata normal form. 9/2586 useless extension candidates. Maximal degree in co-relation 14113. Up to 2377 conditions per place. [2024-06-14 13:07:15,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-14 13:07:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2262 flow [2024-06-14 13:07:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:07:15,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 13:07:15,418 INFO L175 Difference]: Start difference. First operand has 133 places, 164 transitions, 1694 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:07:15,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2262 flow [2024-06-14 13:07:15,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 191 transitions, 2170 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:15,490 INFO L231 Difference]: Finished difference. Result has 136 places, 170 transitions, 1768 flow [2024-06-14 13:07:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1768, PETRI_PLACES=136, PETRI_TRANSITIONS=170} [2024-06-14 13:07:15,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 13:07:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 170 transitions, 1768 flow [2024-06-14 13:07:15,491 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) [2024-06-14 13:07:15,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:15,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:07:15,491 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -955120322, now seen corresponding path program 1 times [2024-06-14 13:07:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471286346] [2024-06-14 13:07:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:16,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:16,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471286346] [2024-06-14 13:07:16,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471286346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:16,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:16,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173244198] [2024-06-14 13:07:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:16,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:16,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 170 transitions, 1768 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:16,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:16,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:16,648 INFO L124 PetriNetUnfolderBase]: 1758/2736 cut-off events. [2024-06-14 13:07:16,649 INFO L125 PetriNetUnfolderBase]: For 35419/35421 co-relation queries the response was YES. [2024-06-14 13:07:16,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15086 conditions, 2736 events. 1758/2736 cut-off events. For 35419/35421 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13779 event pairs, 444 based on Foata normal form. 2/2736 useless extension candidates. Maximal degree in co-relation 15016. Up to 2637 conditions per place. [2024-06-14 13:07:16,674 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-14 13:07:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2363 flow [2024-06-14 13:07:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:07:16,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:07:16,675 INFO L175 Difference]: Start difference. First operand has 136 places, 170 transitions, 1768 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:07:16,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2363 flow [2024-06-14 13:07:16,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2296 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:16,728 INFO L231 Difference]: Finished difference. Result has 143 places, 185 transitions, 1909 flow [2024-06-14 13:07:16,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1909, PETRI_PLACES=143, PETRI_TRANSITIONS=185} [2024-06-14 13:07:16,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 13:07:16,728 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 185 transitions, 1909 flow [2024-06-14 13:07:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:16,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:16,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:16,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:07:16,729 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:16,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:16,730 INFO L85 PathProgramCache]: Analyzing trace with hash 466676354, now seen corresponding path program 2 times [2024-06-14 13:07:16,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:16,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049709053] [2024-06-14 13:07:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:16,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:17,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049709053] [2024-06-14 13:07:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049709053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:17,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:17,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:17,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005526230] [2024-06-14 13:07:17,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:17,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:17,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:17,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 185 transitions, 1909 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) [2024-06-14 13:07:17,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:17,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:17,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:17,923 INFO L124 PetriNetUnfolderBase]: 1695/2686 cut-off events. [2024-06-14 13:07:17,923 INFO L125 PetriNetUnfolderBase]: For 38546/38555 co-relation queries the response was YES. [2024-06-14 13:07:17,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 2686 events. 1695/2686 cut-off events. For 38546/38555 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13691 event pairs, 404 based on Foata normal form. 9/2687 useless extension candidates. Maximal degree in co-relation 15331. Up to 2483 conditions per place. [2024-06-14 13:07:17,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 37 changer transitions 0/208 dead transitions. [2024-06-14 13:07:17,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 208 transitions, 2454 flow [2024-06-14 13:07:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:07:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 13:07:17,944 INFO L175 Difference]: Start difference. First operand has 143 places, 185 transitions, 1909 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:07:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 208 transitions, 2454 flow [2024-06-14 13:07:17,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 208 transitions, 2434 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 13:07:17,997 INFO L231 Difference]: Finished difference. Result has 149 places, 191 transitions, 2051 flow [2024-06-14 13:07:17,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2051, PETRI_PLACES=149, PETRI_TRANSITIONS=191} [2024-06-14 13:07:17,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 13:07:17,998 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 191 transitions, 2051 flow [2024-06-14 13:07:17,998 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) [2024-06-14 13:07:17,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:17,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:07:17,999 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)] === [2024-06-14 13:07:17,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash 198734042, now seen corresponding path program 2 times [2024-06-14 13:07:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:17,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058937477] [2024-06-14 13:07:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:18,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058937477] [2024-06-14 13:07:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058937477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:18,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:18,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273818491] [2024-06-14 13:07:18,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:18,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:18,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 191 transitions, 2051 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:18,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:19,056 INFO L124 PetriNetUnfolderBase]: 1793/2789 cut-off events. [2024-06-14 13:07:19,056 INFO L125 PetriNetUnfolderBase]: For 41959/41961 co-relation queries the response was YES. [2024-06-14 13:07:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16180 conditions, 2789 events. 1793/2789 cut-off events. For 41959/41961 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14061 event pairs, 445 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 16102. Up to 2682 conditions per place. [2024-06-14 13:07:19,078 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-14 13:07:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 209 transitions, 2581 flow [2024-06-14 13:07:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:07:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:07:19,079 INFO L175 Difference]: Start difference. First operand has 149 places, 191 transitions, 2051 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:07:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 209 transitions, 2581 flow [2024-06-14 13:07:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 209 transitions, 2478 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:19,143 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2058 flow [2024-06-14 13:07:19,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2058, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-14 13:07:19,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:07:19,143 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2058 flow [2024-06-14 13:07:19,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:19,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:19,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:07:19,144 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)] === [2024-06-14 13:07:19,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash 198971192, now seen corresponding path program 3 times [2024-06-14 13:07:19,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280238997] [2024-06-14 13:07:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:19,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:19,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280238997] [2024-06-14 13:07:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280238997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:19,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:19,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068678073] [2024-06-14 13:07:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:19,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:19,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:19,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:19,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2058 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:19,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:19,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:20,233 INFO L124 PetriNetUnfolderBase]: 1787/2779 cut-off events. [2024-06-14 13:07:20,233 INFO L125 PetriNetUnfolderBase]: For 44124/44126 co-relation queries the response was YES. [2024-06-14 13:07:20,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16193 conditions, 2779 events. 1787/2779 cut-off events. For 44124/44126 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13964 event pairs, 445 based on Foata normal form. 2/2779 useless extension candidates. Maximal degree in co-relation 16113. Up to 2704 conditions per place. [2024-06-14 13:07:20,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-14 13:07:20,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2494 flow [2024-06-14 13:07:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:07:20,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:07:20,256 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2058 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:07:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2494 flow [2024-06-14 13:07:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 205 transitions, 2439 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:20,319 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2047 flow [2024-06-14 13:07:20,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2047, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-14 13:07:20,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:07:20,320 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2047 flow [2024-06-14 13:07:20,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:20,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:20,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:20,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:07:20,324 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)] === [2024-06-14 13:07:20,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -549194108, now seen corresponding path program 3 times [2024-06-14 13:07:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500321243] [2024-06-14 13:07:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:20,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500321243] [2024-06-14 13:07:20,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500321243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:20,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:20,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:20,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215463193] [2024-06-14 13:07:20,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:20,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:20,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:20,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:21,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:21,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2047 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) [2024-06-14 13:07:21,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:21,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:21,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:21,481 INFO L124 PetriNetUnfolderBase]: 1690/2676 cut-off events. [2024-06-14 13:07:21,481 INFO L125 PetriNetUnfolderBase]: For 42609/42618 co-relation queries the response was YES. [2024-06-14 13:07:21,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15547 conditions, 2676 events. 1690/2676 cut-off events. For 42609/42618 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13546 event pairs, 404 based on Foata normal form. 9/2677 useless extension candidates. Maximal degree in co-relation 15467. Up to 2452 conditions per place. [2024-06-14 13:07:21,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 41 changer transitions 0/214 dead transitions. [2024-06-14 13:07:21,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 214 transitions, 2523 flow [2024-06-14 13:07:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 13:07:21,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 13:07:21,503 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2047 flow. Second operand 6 states and 116 transitions. [2024-06-14 13:07:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 214 transitions, 2523 flow [2024-06-14 13:07:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 214 transitions, 2468 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:21,558 INFO L231 Difference]: Finished difference. Result has 156 places, 196 transitions, 2092 flow [2024-06-14 13:07:21,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2092, PETRI_PLACES=156, PETRI_TRANSITIONS=196} [2024-06-14 13:07:21,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-14 13:07:21,559 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 196 transitions, 2092 flow [2024-06-14 13:07:21,559 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) [2024-06-14 13:07:21,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:21,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:07:21,560 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:21,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 198980120, now seen corresponding path program 1 times [2024-06-14 13:07:21,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:21,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794313861] [2024-06-14 13:07:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:21,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:22,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794313861] [2024-06-14 13:07:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794313861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:22,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:22,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:22,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835096530] [2024-06-14 13:07:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:22,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:22,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 2092 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:22,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:22,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:22,894 INFO L124 PetriNetUnfolderBase]: 1773/2760 cut-off events. [2024-06-14 13:07:22,894 INFO L125 PetriNetUnfolderBase]: For 45294/45296 co-relation queries the response was YES. [2024-06-14 13:07:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16180 conditions, 2760 events. 1773/2760 cut-off events. For 45294/45296 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13836 event pairs, 443 based on Foata normal form. 2/2760 useless extension candidates. Maximal degree in co-relation 16100. Up to 2682 conditions per place. [2024-06-14 13:07:22,917 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 188 selfloop transitions, 15 changer transitions 0/207 dead transitions. [2024-06-14 13:07:22,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 207 transitions, 2538 flow [2024-06-14 13:07:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:07:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:07:22,918 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 2092 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:07:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 207 transitions, 2538 flow [2024-06-14 13:07:22,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 207 transitions, 2445 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:22,990 INFO L231 Difference]: Finished difference. Result has 157 places, 198 transitions, 2054 flow [2024-06-14 13:07:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2054, PETRI_PLACES=157, PETRI_TRANSITIONS=198} [2024-06-14 13:07:22,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-14 13:07:22,991 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 198 transitions, 2054 flow [2024-06-14 13:07:22,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:22,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:22,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:07:22,991 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)] === [2024-06-14 13:07:22,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 647313017, now seen corresponding path program 1 times [2024-06-14 13:07:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003780326] [2024-06-14 13:07:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:24,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:24,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003780326] [2024-06-14 13:07:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003780326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:24,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:24,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435606616] [2024-06-14 13:07:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:24,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:24,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 198 transitions, 2054 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:24,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:24,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:25,132 INFO L124 PetriNetUnfolderBase]: 1855/2902 cut-off events. [2024-06-14 13:07:25,133 INFO L125 PetriNetUnfolderBase]: For 50959/50961 co-relation queries the response was YES. [2024-06-14 13:07:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16862 conditions, 2902 events. 1855/2902 cut-off events. For 50959/50961 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14793 event pairs, 373 based on Foata normal form. 12/2905 useless extension candidates. Maximal degree in co-relation 16781. Up to 2467 conditions per place. [2024-06-14 13:07:25,156 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-14 13:07:25,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2628 flow [2024-06-14 13:07:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:07:25,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:07:25,158 INFO L175 Difference]: Start difference. First operand has 157 places, 198 transitions, 2054 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:07:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2628 flow [2024-06-14 13:07:25,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 228 transitions, 2589 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:25,236 INFO L231 Difference]: Finished difference. Result has 161 places, 200 transitions, 2165 flow [2024-06-14 13:07:25,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2165, PETRI_PLACES=161, PETRI_TRANSITIONS=200} [2024-06-14 13:07:25,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 13:07:25,237 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 200 transitions, 2165 flow [2024-06-14 13:07:25,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:25,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:25,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:25,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:07:25,237 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)] === [2024-06-14 13:07:25,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1705197963, now seen corresponding path program 2 times [2024-06-14 13:07:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:25,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788667025] [2024-06-14 13:07:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788667025] [2024-06-14 13:07:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788667025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:26,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:26,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:26,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862845278] [2024-06-14 13:07:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:26,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:26,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:26,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 200 transitions, 2165 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:26,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:26,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:27,262 INFO L124 PetriNetUnfolderBase]: 1983/3106 cut-off events. [2024-06-14 13:07:27,262 INFO L125 PetriNetUnfolderBase]: For 55933/55935 co-relation queries the response was YES. [2024-06-14 13:07:27,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18270 conditions, 3106 events. 1983/3106 cut-off events. For 55933/55935 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16189 event pairs, 386 based on Foata normal form. 14/3115 useless extension candidates. Maximal degree in co-relation 18188. Up to 2818 conditions per place. [2024-06-14 13:07:27,287 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 48 changer transitions 0/258 dead transitions. [2024-06-14 13:07:27,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3060 flow [2024-06-14 13:07:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:07:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:07:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-14 13:07:27,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-14 13:07:27,288 INFO L175 Difference]: Start difference. First operand has 161 places, 200 transitions, 2165 flow. Second operand 11 states and 190 transitions. [2024-06-14 13:07:27,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3060 flow [2024-06-14 13:07:27,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 258 transitions, 2910 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:27,364 INFO L231 Difference]: Finished difference. Result has 169 places, 220 transitions, 2422 flow [2024-06-14 13:07:27,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2422, PETRI_PLACES=169, PETRI_TRANSITIONS=220} [2024-06-14 13:07:27,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 13:07:27,365 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 220 transitions, 2422 flow [2024-06-14 13:07:27,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:27,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:27,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:27,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:07:27,365 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)] === [2024-06-14 13:07:27,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2102809513, now seen corresponding path program 3 times [2024-06-14 13:07:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:27,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804541965] [2024-06-14 13:07:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:28,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:28,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804541965] [2024-06-14 13:07:28,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804541965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:28,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:28,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569486270] [2024-06-14 13:07:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:28,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:28,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:28,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:28,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 220 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:28,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:28,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:28,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:29,270 INFO L124 PetriNetUnfolderBase]: 2024/3177 cut-off events. [2024-06-14 13:07:29,270 INFO L125 PetriNetUnfolderBase]: For 59999/60001 co-relation queries the response was YES. [2024-06-14 13:07:29,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18775 conditions, 3177 events. 2024/3177 cut-off events. For 59999/60001 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16631 event pairs, 352 based on Foata normal form. 12/3180 useless extension candidates. Maximal degree in co-relation 18689. Up to 2842 conditions per place. [2024-06-14 13:07:29,291 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-14 13:07:29,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 249 transitions, 3018 flow [2024-06-14 13:07:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:07:29,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:07:29,293 INFO L175 Difference]: Start difference. First operand has 169 places, 220 transitions, 2422 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:07:29,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 249 transitions, 3018 flow [2024-06-14 13:07:29,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 249 transitions, 2951 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:29,384 INFO L231 Difference]: Finished difference. Result has 174 places, 221 transitions, 2455 flow [2024-06-14 13:07:29,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2455, PETRI_PLACES=174, PETRI_TRANSITIONS=221} [2024-06-14 13:07:29,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-14 13:07:29,384 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 221 transitions, 2455 flow [2024-06-14 13:07:29,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:29,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:29,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:07:29,385 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)] === [2024-06-14 13:07:29,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1715434007, now seen corresponding path program 4 times [2024-06-14 13:07:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:29,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024623333] [2024-06-14 13:07:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:29,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:30,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024623333] [2024-06-14 13:07:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024623333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:30,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785853512] [2024-06-14 13:07:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:30,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:30,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 221 transitions, 2455 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:30,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:30,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:30,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:31,562 INFO L124 PetriNetUnfolderBase]: 2099/3307 cut-off events. [2024-06-14 13:07:31,563 INFO L125 PetriNetUnfolderBase]: For 64861/64870 co-relation queries the response was YES. [2024-06-14 13:07:31,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19441 conditions, 3307 events. 2099/3307 cut-off events. For 64861/64870 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17535 event pairs, 474 based on Foata normal form. 18/3320 useless extension candidates. Maximal degree in co-relation 19354. Up to 2828 conditions per place. [2024-06-14 13:07:31,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 39 changer transitions 0/269 dead transitions. [2024-06-14 13:07:31,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 269 transitions, 3225 flow [2024-06-14 13:07:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:07:31,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:07:31,587 INFO L175 Difference]: Start difference. First operand has 174 places, 221 transitions, 2455 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:07:31,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 269 transitions, 3225 flow [2024-06-14 13:07:31,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 269 transitions, 3143 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:31,685 INFO L231 Difference]: Finished difference. Result has 180 places, 226 transitions, 2539 flow [2024-06-14 13:07:31,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2539, PETRI_PLACES=180, PETRI_TRANSITIONS=226} [2024-06-14 13:07:31,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 13:07:31,686 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 226 transitions, 2539 flow [2024-06-14 13:07:31,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:31,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:31,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:31,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:07:31,686 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)] === [2024-06-14 13:07:31,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1779248421, now seen corresponding path program 5 times [2024-06-14 13:07:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522579796] [2024-06-14 13:07:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:32,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:32,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522579796] [2024-06-14 13:07:32,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522579796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:32,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:32,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:32,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926340638] [2024-06-14 13:07:32,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:32,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:32,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:32,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 226 transitions, 2539 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:32,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:32,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:32,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:33,504 INFO L124 PetriNetUnfolderBase]: 2079/3270 cut-off events. [2024-06-14 13:07:33,505 INFO L125 PetriNetUnfolderBase]: For 65307/65309 co-relation queries the response was YES. [2024-06-14 13:07:33,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19209 conditions, 3270 events. 2079/3270 cut-off events. For 65307/65309 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17227 event pairs, 435 based on Foata normal form. 12/3273 useless extension candidates. Maximal degree in co-relation 19119. Up to 2754 conditions per place. [2024-06-14 13:07:33,532 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 66 changer transitions 0/255 dead transitions. [2024-06-14 13:07:33,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 255 transitions, 3109 flow [2024-06-14 13:07:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:07:33,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 13:07:33,533 INFO L175 Difference]: Start difference. First operand has 180 places, 226 transitions, 2539 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:07:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 255 transitions, 3109 flow [2024-06-14 13:07:33,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 255 transitions, 3022 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:33,633 INFO L231 Difference]: Finished difference. Result has 184 places, 226 transitions, 2577 flow [2024-06-14 13:07:33,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=184, PETRI_TRANSITIONS=226} [2024-06-14 13:07:33,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 13:07:33,634 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 226 transitions, 2577 flow [2024-06-14 13:07:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:33,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:07:33,634 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:33,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 452227369, now seen corresponding path program 1 times [2024-06-14 13:07:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684405327] [2024-06-14 13:07:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684405327] [2024-06-14 13:07:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684405327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:34,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:34,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:34,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906205600] [2024-06-14 13:07:34,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:34,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:34,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:34,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 226 transitions, 2577 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) [2024-06-14 13:07:34,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:34,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:35,201 INFO L124 PetriNetUnfolderBase]: 2041/3235 cut-off events. [2024-06-14 13:07:35,202 INFO L125 PetriNetUnfolderBase]: For 67895/67898 co-relation queries the response was YES. [2024-06-14 13:07:35,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19257 conditions, 3235 events. 2041/3235 cut-off events. For 67895/67898 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17201 event pairs, 478 based on Foata normal form. 6/3227 useless extension candidates. Maximal degree in co-relation 19166. Up to 2712 conditions per place. [2024-06-14 13:07:35,225 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 107 changer transitions 0/265 dead transitions. [2024-06-14 13:07:35,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 265 transitions, 3475 flow [2024-06-14 13:07:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:07:35,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 13:07:35,227 INFO L175 Difference]: Start difference. First operand has 184 places, 226 transitions, 2577 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:07:35,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 265 transitions, 3475 flow [2024-06-14 13:07:35,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 265 transitions, 3290 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:35,337 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 2867 flow [2024-06-14 13:07:35,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2867, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-14 13:07:35,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 13:07:35,338 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 2867 flow [2024-06-14 13:07:35,338 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) [2024-06-14 13:07:35,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:35,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:35,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:07:35,339 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:35,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1578347496, now seen corresponding path program 1 times [2024-06-14 13:07:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:35,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635488203] [2024-06-14 13:07:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:35,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635488203] [2024-06-14 13:07:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635488203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:36,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:36,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964630086] [2024-06-14 13:07:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:36,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:36,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 2867 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:36,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:36,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:36,667 INFO L124 PetriNetUnfolderBase]: 2125/3336 cut-off events. [2024-06-14 13:07:36,667 INFO L125 PetriNetUnfolderBase]: For 73470/73472 co-relation queries the response was YES. [2024-06-14 13:07:36,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20553 conditions, 3336 events. 2125/3336 cut-off events. For 73470/73472 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17654 event pairs, 567 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 20462. Up to 3185 conditions per place. [2024-06-14 13:07:36,695 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-14 13:07:36,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 275 transitions, 3681 flow [2024-06-14 13:07:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:07:36,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 13:07:36,696 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 2867 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:07:36,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 275 transitions, 3681 flow [2024-06-14 13:07:36,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 275 transitions, 3511 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:36,814 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 2952 flow [2024-06-14 13:07:36,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-14 13:07:36,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-14 13:07:36,815 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 2952 flow [2024-06-14 13:07:36,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:36,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:36,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:07:36,815 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:36,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1582072146, now seen corresponding path program 2 times [2024-06-14 13:07:36,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:36,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897148414] [2024-06-14 13:07:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:36,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897148414] [2024-06-14 13:07:37,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897148414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:37,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22184359] [2024-06-14 13:07:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:37,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:37,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:37,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 2952 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:37,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:37,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:37,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:38,394 INFO L124 PetriNetUnfolderBase]: 2151/3374 cut-off events. [2024-06-14 13:07:38,394 INFO L125 PetriNetUnfolderBase]: For 73631/73633 co-relation queries the response was YES. [2024-06-14 13:07:38,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3374 events. 2151/3374 cut-off events. For 73631/73633 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17863 event pairs, 567 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 20735. Up to 3248 conditions per place. [2024-06-14 13:07:38,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-14 13:07:38,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 281 transitions, 3712 flow [2024-06-14 13:07:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:07:38,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-14 13:07:38,425 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 2952 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:07:38,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 281 transitions, 3712 flow [2024-06-14 13:07:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 3636 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:38,563 INFO L231 Difference]: Finished difference. Result has 201 places, 261 transitions, 3052 flow [2024-06-14 13:07:38,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3052, PETRI_PLACES=201, PETRI_TRANSITIONS=261} [2024-06-14 13:07:38,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 13:07:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 261 transitions, 3052 flow [2024-06-14 13:07:38,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:38,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:07:38,564 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)] === [2024-06-14 13:07:38,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 456036649, now seen corresponding path program 2 times [2024-06-14 13:07:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711491271] [2024-06-14 13:07:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711491271] [2024-06-14 13:07:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711491271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:39,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:39,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503441182] [2024-06-14 13:07:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:39,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:39,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:39,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:39,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 261 transitions, 3052 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) [2024-06-14 13:07:39,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:39,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:39,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:40,127 INFO L124 PetriNetUnfolderBase]: 2118/3343 cut-off events. [2024-06-14 13:07:40,127 INFO L125 PetriNetUnfolderBase]: For 78180/78183 co-relation queries the response was YES. [2024-06-14 13:07:40,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20769 conditions, 3343 events. 2118/3343 cut-off events. For 78180/78183 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17809 event pairs, 482 based on Foata normal form. 6/3335 useless extension candidates. Maximal degree in co-relation 20672. Up to 2978 conditions per place. [2024-06-14 13:07:40,158 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 191 selfloop transitions, 74 changer transitions 0/287 dead transitions. [2024-06-14 13:07:40,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 287 transitions, 3798 flow [2024-06-14 13:07:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:07:40,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 13:07:40,160 INFO L175 Difference]: Start difference. First operand has 201 places, 261 transitions, 3052 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:07:40,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 287 transitions, 3798 flow [2024-06-14 13:07:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 287 transitions, 3746 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:40,322 INFO L231 Difference]: Finished difference. Result has 205 places, 271 transitions, 3322 flow [2024-06-14 13:07:40,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3322, PETRI_PLACES=205, PETRI_TRANSITIONS=271} [2024-06-14 13:07:40,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 13:07:40,322 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 271 transitions, 3322 flow [2024-06-14 13:07:40,323 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) [2024-06-14 13:07:40,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:40,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:07:40,323 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)] === [2024-06-14 13:07:40,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1582066566, now seen corresponding path program 3 times [2024-06-14 13:07:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:40,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010769793] [2024-06-14 13:07:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:41,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:41,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010769793] [2024-06-14 13:07:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010769793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:41,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:41,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868875363] [2024-06-14 13:07:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:41,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:41,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:41,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:41,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 271 transitions, 3322 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:41,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:41,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:41,715 INFO L124 PetriNetUnfolderBase]: 2170/3399 cut-off events. [2024-06-14 13:07:41,715 INFO L125 PetriNetUnfolderBase]: For 85977/85979 co-relation queries the response was YES. [2024-06-14 13:07:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21670 conditions, 3399 events. 2170/3399 cut-off events. For 85977/85979 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17964 event pairs, 568 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 21570. Up to 3278 conditions per place. [2024-06-14 13:07:41,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 34 changer transitions 0/288 dead transitions. [2024-06-14 13:07:41,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 288 transitions, 3942 flow [2024-06-14 13:07:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:07:41,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:07:41,800 INFO L175 Difference]: Start difference. First operand has 205 places, 271 transitions, 3322 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:07:41,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 288 transitions, 3942 flow [2024-06-14 13:07:41,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 288 transitions, 3735 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:41,972 INFO L231 Difference]: Finished difference. Result has 208 places, 271 transitions, 3189 flow [2024-06-14 13:07:41,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=208, PETRI_TRANSITIONS=271} [2024-06-14 13:07:41,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 13:07:41,973 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 271 transitions, 3189 flow [2024-06-14 13:07:41,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:41,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:41,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:07:41,973 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)] === [2024-06-14 13:07:41,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1873140950, now seen corresponding path program 4 times [2024-06-14 13:07:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449912909] [2024-06-14 13:07:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:42,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:42,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449912909] [2024-06-14 13:07:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449912909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:42,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:42,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653130198] [2024-06-14 13:07:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:42,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:42,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:42,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:42,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 271 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:42,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:42,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:42,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:43,364 INFO L124 PetriNetUnfolderBase]: 2180/3413 cut-off events. [2024-06-14 13:07:43,364 INFO L125 PetriNetUnfolderBase]: For 84947/84949 co-relation queries the response was YES. [2024-06-14 13:07:43,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21524 conditions, 3413 events. 2180/3413 cut-off events. For 84947/84949 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18048 event pairs, 571 based on Foata normal form. 2/3413 useless extension candidates. Maximal degree in co-relation 21424. Up to 3328 conditions per place. [2024-06-14 13:07:43,392 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 17 changer transitions 0/285 dead transitions. [2024-06-14 13:07:43,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 285 transitions, 3818 flow [2024-06-14 13:07:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:07:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 13:07:43,393 INFO L175 Difference]: Start difference. First operand has 208 places, 271 transitions, 3189 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:07:43,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 285 transitions, 3818 flow [2024-06-14 13:07:43,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 285 transitions, 3750 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:43,566 INFO L231 Difference]: Finished difference. Result has 208 places, 274 transitions, 3202 flow [2024-06-14 13:07:43,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3202, PETRI_PLACES=208, PETRI_TRANSITIONS=274} [2024-06-14 13:07:43,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 13:07:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 274 transitions, 3202 flow [2024-06-14 13:07:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:43,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:07:43,567 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)] === [2024-06-14 13:07:43,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 154858896, now seen corresponding path program 5 times [2024-06-14 13:07:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800552917] [2024-06-14 13:07:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800552917] [2024-06-14 13:07:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800552917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:44,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:44,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117073809] [2024-06-14 13:07:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:44,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:44,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 274 transitions, 3202 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:44,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:44,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:44,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:44,940 INFO L124 PetriNetUnfolderBase]: 2190/3429 cut-off events. [2024-06-14 13:07:44,940 INFO L125 PetriNetUnfolderBase]: For 89434/89436 co-relation queries the response was YES. [2024-06-14 13:07:44,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 3429 events. 2190/3429 cut-off events. For 89434/89436 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18177 event pairs, 570 based on Foata normal form. 2/3429 useless extension candidates. Maximal degree in co-relation 21629. Up to 3295 conditions per place. [2024-06-14 13:07:44,968 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 32 changer transitions 0/295 dead transitions. [2024-06-14 13:07:44,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 295 transitions, 3959 flow [2024-06-14 13:07:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:07:44,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 13:07:44,969 INFO L175 Difference]: Start difference. First operand has 208 places, 274 transitions, 3202 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:07:44,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 295 transitions, 3959 flow [2024-06-14 13:07:45,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 295 transitions, 3909 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:45,159 INFO L231 Difference]: Finished difference. Result has 211 places, 279 transitions, 3299 flow [2024-06-14 13:07:45,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3299, PETRI_PLACES=211, PETRI_TRANSITIONS=279} [2024-06-14 13:07:45,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-14 13:07:45,160 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 279 transitions, 3299 flow [2024-06-14 13:07:45,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:45,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:45,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:07:45,160 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:45,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1873148607, now seen corresponding path program 1 times [2024-06-14 13:07:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680573462] [2024-06-14 13:07:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:45,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:45,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680573462] [2024-06-14 13:07:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680573462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:45,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:45,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581561721] [2024-06-14 13:07:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:45,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:45,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 279 transitions, 3299 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:45,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:45,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:46,571 INFO L124 PetriNetUnfolderBase]: 2187/3423 cut-off events. [2024-06-14 13:07:46,572 INFO L125 PetriNetUnfolderBase]: For 93691/93693 co-relation queries the response was YES. [2024-06-14 13:07:46,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21893 conditions, 3423 events. 2187/3423 cut-off events. For 93691/93693 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18139 event pairs, 570 based on Foata normal form. 1/3422 useless extension candidates. Maximal degree in co-relation 21790. Up to 3340 conditions per place. [2024-06-14 13:07:46,603 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 19 changer transitions 0/291 dead transitions. [2024-06-14 13:07:46,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 3929 flow [2024-06-14 13:07:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:07:46,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:07:46,604 INFO L175 Difference]: Start difference. First operand has 211 places, 279 transitions, 3299 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:07:46,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 3929 flow [2024-06-14 13:07:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 291 transitions, 3861 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:46,795 INFO L231 Difference]: Finished difference. Result has 214 places, 282 transitions, 3315 flow [2024-06-14 13:07:46,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3315, PETRI_PLACES=214, PETRI_TRANSITIONS=282} [2024-06-14 13:07:46,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 13:07:46,796 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 282 transitions, 3315 flow [2024-06-14 13:07:46,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:46,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:46,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:46,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:07:46,796 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:46,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2087428605, now seen corresponding path program 3 times [2024-06-14 13:07:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:46,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584001124] [2024-06-14 13:07:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:46,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584001124] [2024-06-14 13:07:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584001124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895491158] [2024-06-14 13:07:47,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:47,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:07:47,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 282 transitions, 3315 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) [2024-06-14 13:07:47,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:47,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:07:47,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:48,349 INFO L124 PetriNetUnfolderBase]: 2124/3357 cut-off events. [2024-06-14 13:07:48,350 INFO L125 PetriNetUnfolderBase]: For 97049/97058 co-relation queries the response was YES. [2024-06-14 13:07:48,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21520 conditions, 3357 events. 2124/3357 cut-off events. For 97049/97058 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17943 event pairs, 478 based on Foata normal form. 9/3358 useless extension candidates. Maximal degree in co-relation 21416. Up to 3041 conditions per place. [2024-06-14 13:07:48,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 55 changer transitions 0/307 dead transitions. [2024-06-14 13:07:48,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 307 transitions, 4029 flow [2024-06-14 13:07:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:07:48,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-14 13:07:48,382 INFO L175 Difference]: Start difference. First operand has 214 places, 282 transitions, 3315 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:07:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 307 transitions, 4029 flow [2024-06-14 13:07:48,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 307 transitions, 3985 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:48,576 INFO L231 Difference]: Finished difference. Result has 217 places, 285 transitions, 3458 flow [2024-06-14 13:07:48,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3458, PETRI_PLACES=217, PETRI_TRANSITIONS=285} [2024-06-14 13:07:48,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 13:07:48,577 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 285 transitions, 3458 flow [2024-06-14 13:07:48,577 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) [2024-06-14 13:07:48,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:48,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:48,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:07:48,577 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:48,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1865783720, now seen corresponding path program 6 times [2024-06-14 13:07:48,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:48,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178759269] [2024-06-14 13:07:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:49,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178759269] [2024-06-14 13:07:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178759269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:49,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:49,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140430481] [2024-06-14 13:07:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:49,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:49,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:49,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 285 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:49,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:49,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:49,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:49,978 INFO L124 PetriNetUnfolderBase]: 2180/3414 cut-off events. [2024-06-14 13:07:49,978 INFO L125 PetriNetUnfolderBase]: For 100355/100357 co-relation queries the response was YES. [2024-06-14 13:07:50,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22285 conditions, 3414 events. 2180/3414 cut-off events. For 100355/100357 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18095 event pairs, 568 based on Foata normal form. 2/3414 useless extension candidates. Maximal degree in co-relation 22180. Up to 3285 conditions per place. [2024-06-14 13:07:50,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 34 changer transitions 0/303 dead transitions. [2024-06-14 13:07:50,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 4112 flow [2024-06-14 13:07:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:07:50,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 13:07:50,016 INFO L175 Difference]: Start difference. First operand has 217 places, 285 transitions, 3458 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:07:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 4112 flow [2024-06-14 13:07:50,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 303 transitions, 3968 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:50,199 INFO L231 Difference]: Finished difference. Result has 219 places, 285 transitions, 3388 flow [2024-06-14 13:07:50,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3388, PETRI_PLACES=219, PETRI_TRANSITIONS=285} [2024-06-14 13:07:50,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 13:07:50,200 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 285 transitions, 3388 flow [2024-06-14 13:07:50,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:50,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:50,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:50,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:07:50,201 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:50,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1274755267, now seen corresponding path program 1 times [2024-06-14 13:07:50,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313312601] [2024-06-14 13:07:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:50,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:50,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:50,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313312601] [2024-06-14 13:07:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313312601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:50,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:50,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:50,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585380243] [2024-06-14 13:07:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:51,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:51,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 285 transitions, 3388 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:51,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:51,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:51,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:51,721 INFO L124 PetriNetUnfolderBase]: 2274/3562 cut-off events. [2024-06-14 13:07:51,721 INFO L125 PetriNetUnfolderBase]: For 109970/109979 co-relation queries the response was YES. [2024-06-14 13:07:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23351 conditions, 3562 events. 2274/3562 cut-off events. For 109970/109979 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19016 event pairs, 480 based on Foata normal form. 10/3567 useless extension candidates. Maximal degree in co-relation 23245. Up to 3321 conditions per place. [2024-06-14 13:07:51,757 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 56 changer transitions 0/327 dead transitions. [2024-06-14 13:07:51,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 327 transitions, 4490 flow [2024-06-14 13:07:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:07:51,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:07:51,758 INFO L175 Difference]: Start difference. First operand has 219 places, 285 transitions, 3388 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:07:51,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 327 transitions, 4490 flow [2024-06-14 13:07:51,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 327 transitions, 4380 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:51,963 INFO L231 Difference]: Finished difference. Result has 224 places, 304 transitions, 3737 flow [2024-06-14 13:07:51,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3737, PETRI_PLACES=224, PETRI_TRANSITIONS=304} [2024-06-14 13:07:51,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:07:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 304 transitions, 3737 flow [2024-06-14 13:07:51,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:51,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:07:51,964 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 617374905, now seen corresponding path program 2 times [2024-06-14 13:07:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790184269] [2024-06-14 13:07:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:52,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:52,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790184269] [2024-06-14 13:07:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790184269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:52,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:52,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374135431] [2024-06-14 13:07:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:52,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:52,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 304 transitions, 3737 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:52,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:52,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:52,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:53,334 INFO L124 PetriNetUnfolderBase]: 2294/3589 cut-off events. [2024-06-14 13:07:53,335 INFO L125 PetriNetUnfolderBase]: For 118049/118058 co-relation queries the response was YES. [2024-06-14 13:07:53,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24323 conditions, 3589 events. 2294/3589 cut-off events. For 118049/118058 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19099 event pairs, 488 based on Foata normal form. 10/3594 useless extension candidates. Maximal degree in co-relation 24214. Up to 3446 conditions per place. [2024-06-14 13:07:53,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 30 changer transitions 0/319 dead transitions. [2024-06-14 13:07:53,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 319 transitions, 4481 flow [2024-06-14 13:07:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:07:53,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:07:53,433 INFO L175 Difference]: Start difference. First operand has 224 places, 304 transitions, 3737 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:07:53,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 319 transitions, 4481 flow [2024-06-14 13:07:53,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 319 transitions, 4414 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 13:07:53,655 INFO L231 Difference]: Finished difference. Result has 228 places, 307 transitions, 3799 flow [2024-06-14 13:07:53,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3799, PETRI_PLACES=228, PETRI_TRANSITIONS=307} [2024-06-14 13:07:53,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 13:07:53,655 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 307 transitions, 3799 flow [2024-06-14 13:07:53,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:53,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:53,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:07:53,656 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 617137755, now seen corresponding path program 3 times [2024-06-14 13:07:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603182707] [2024-06-14 13:07:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:54,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:54,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603182707] [2024-06-14 13:07:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603182707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115322821] [2024-06-14 13:07:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:54,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:54,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:54,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 307 transitions, 3799 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:54,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:54,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:55,124 INFO L124 PetriNetUnfolderBase]: 2282/3574 cut-off events. [2024-06-14 13:07:55,124 INFO L125 PetriNetUnfolderBase]: For 120293/120302 co-relation queries the response was YES. [2024-06-14 13:07:55,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24214 conditions, 3574 events. 2282/3574 cut-off events. For 120293/120302 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19084 event pairs, 476 based on Foata normal form. 10/3579 useless extension candidates. Maximal degree in co-relation 24103. Up to 3329 conditions per place. [2024-06-14 13:07:55,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-14 13:07:55,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 327 transitions, 4557 flow [2024-06-14 13:07:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:07:55,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:07:55,162 INFO L175 Difference]: Start difference. First operand has 228 places, 307 transitions, 3799 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:07:55,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 327 transitions, 4557 flow [2024-06-14 13:07:55,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4459 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:55,430 INFO L231 Difference]: Finished difference. Result has 232 places, 308 transitions, 3878 flow [2024-06-14 13:07:55,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3878, PETRI_PLACES=232, PETRI_TRANSITIONS=308} [2024-06-14 13:07:55,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 13:07:55,431 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 308 transitions, 3878 flow [2024-06-14 13:07:55,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:55,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:55,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:07:55,432 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:55,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash 617383833, now seen corresponding path program 1 times [2024-06-14 13:07:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:55,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123763072] [2024-06-14 13:07:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:55,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123763072] [2024-06-14 13:07:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123763072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:56,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130210230] [2024-06-14 13:07:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:56,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:56,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 308 transitions, 3878 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:57,190 INFO L124 PetriNetUnfolderBase]: 2326/3633 cut-off events. [2024-06-14 13:07:57,190 INFO L125 PetriNetUnfolderBase]: For 132315/132317 co-relation queries the response was YES. [2024-06-14 13:07:57,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24829 conditions, 3633 events. 2326/3633 cut-off events. For 132315/132317 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19368 event pairs, 504 based on Foata normal form. 12/3636 useless extension candidates. Maximal degree in co-relation 24716. Up to 3388 conditions per place. [2024-06-14 13:07:57,225 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 280 selfloop transitions, 41 changer transitions 0/325 dead transitions. [2024-06-14 13:07:57,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4638 flow [2024-06-14 13:07:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:07:57,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:07:57,226 INFO L175 Difference]: Start difference. First operand has 232 places, 308 transitions, 3878 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:07:57,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4638 flow [2024-06-14 13:07:57,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4531 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:57,502 INFO L231 Difference]: Finished difference. Result has 232 places, 309 transitions, 3875 flow [2024-06-14 13:07:57,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3875, PETRI_PLACES=232, PETRI_TRANSITIONS=309} [2024-06-14 13:07:57,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 13:07:57,503 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 309 transitions, 3875 flow [2024-06-14 13:07:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:57,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:57,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:07:57,503 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:57,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1444910909, now seen corresponding path program 4 times [2024-06-14 13:07:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:57,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117588849] [2024-06-14 13:07:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117588849] [2024-06-14 13:07:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117588849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:58,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:58,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268566537] [2024-06-14 13:07:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:58,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:58,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:07:58,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 309 transitions, 3875 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:58,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:58,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:07:58,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:59,155 INFO L124 PetriNetUnfolderBase]: 2388/3732 cut-off events. [2024-06-14 13:07:59,155 INFO L125 PetriNetUnfolderBase]: For 125728/125737 co-relation queries the response was YES. [2024-06-14 13:07:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25454 conditions, 3732 events. 2388/3732 cut-off events. For 125728/125737 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20017 event pairs, 498 based on Foata normal form. 10/3737 useless extension candidates. Maximal degree in co-relation 25342. Up to 3473 conditions per place. [2024-06-14 13:07:59,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 54 changer transitions 0/346 dead transitions. [2024-06-14 13:07:59,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 346 transitions, 4941 flow [2024-06-14 13:07:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:07:59,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:07:59,194 INFO L175 Difference]: Start difference. First operand has 232 places, 309 transitions, 3875 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:07:59,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 346 transitions, 4941 flow [2024-06-14 13:07:59,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4863 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:59,456 INFO L231 Difference]: Finished difference. Result has 237 places, 318 transitions, 4053 flow [2024-06-14 13:07:59,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4053, PETRI_PLACES=237, PETRI_TRANSITIONS=318} [2024-06-14 13:07:59,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:07:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 318 transitions, 4053 flow [2024-06-14 13:07:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:59,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:59,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:59,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:07:59,457 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)] === [2024-06-14 13:07:59,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1251989695, now seen corresponding path program 5 times [2024-06-14 13:07:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469748894] [2024-06-14 13:07:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:00,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469748894] [2024-06-14 13:08:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469748894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:00,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028996455] [2024-06-14 13:08:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:00,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:00,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 318 transitions, 4053 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:00,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:00,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:00,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:01,073 INFO L124 PetriNetUnfolderBase]: 2408/3766 cut-off events. [2024-06-14 13:08:01,074 INFO L125 PetriNetUnfolderBase]: For 132937/132946 co-relation queries the response was YES. [2024-06-14 13:08:01,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26118 conditions, 3766 events. 2408/3766 cut-off events. For 132937/132946 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20260 event pairs, 502 based on Foata normal form. 10/3771 useless extension candidates. Maximal degree in co-relation 26005. Up to 3529 conditions per place. [2024-06-14 13:08:01,109 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 53 changer transitions 0/341 dead transitions. [2024-06-14 13:08:01,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 341 transitions, 4906 flow [2024-06-14 13:08:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:08:01,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:08:01,110 INFO L175 Difference]: Start difference. First operand has 237 places, 318 transitions, 4053 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:08:01,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 341 transitions, 4906 flow [2024-06-14 13:08:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 341 transitions, 4678 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:01,379 INFO L231 Difference]: Finished difference. Result has 239 places, 321 transitions, 3999 flow [2024-06-14 13:08:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=239, PETRI_TRANSITIONS=321} [2024-06-14 13:08:01,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:08:01,380 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 321 transitions, 3999 flow [2024-06-14 13:08:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:01,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:08:01,380 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)] === [2024-06-14 13:08:01,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1799589659, now seen corresponding path program 6 times [2024-06-14 13:08:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455253512] [2024-06-14 13:08:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:02,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455253512] [2024-06-14 13:08:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455253512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795819321] [2024-06-14 13:08:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:02,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:02,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:02,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 321 transitions, 3999 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:02,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:02,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:02,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:02,914 INFO L124 PetriNetUnfolderBase]: 2452/3831 cut-off events. [2024-06-14 13:08:02,915 INFO L125 PetriNetUnfolderBase]: For 140210/140219 co-relation queries the response was YES. [2024-06-14 13:08:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26587 conditions, 3831 events. 2452/3831 cut-off events. For 140210/140219 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20655 event pairs, 511 based on Foata normal form. 10/3836 useless extension candidates. Maximal degree in co-relation 26475. Up to 3429 conditions per place. [2024-06-14 13:08:02,954 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 267 selfloop transitions, 82 changer transitions 0/353 dead transitions. [2024-06-14 13:08:02,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 353 transitions, 5056 flow [2024-06-14 13:08:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:08:02,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:08:02,955 INFO L175 Difference]: Start difference. First operand has 239 places, 321 transitions, 3999 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:08:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 353 transitions, 5056 flow [2024-06-14 13:08:03,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 353 transitions, 4906 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:03,249 INFO L231 Difference]: Finished difference. Result has 241 places, 330 transitions, 4193 flow [2024-06-14 13:08:03,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4193, PETRI_PLACES=241, PETRI_TRANSITIONS=330} [2024-06-14 13:08:03,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-14 13:08:03,250 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 330 transitions, 4193 flow [2024-06-14 13:08:03,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:03,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:03,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:08:03,250 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:03,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:03,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2004471131, now seen corresponding path program 7 times [2024-06-14 13:08:03,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:03,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271499030] [2024-06-14 13:08:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:03,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:03,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271499030] [2024-06-14 13:08:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271499030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:03,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:03,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327911964] [2024-06-14 13:08:03,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:03,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 330 transitions, 4193 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:04,819 INFO L124 PetriNetUnfolderBase]: 2440/3815 cut-off events. [2024-06-14 13:08:04,820 INFO L125 PetriNetUnfolderBase]: For 139979/139988 co-relation queries the response was YES. [2024-06-14 13:08:04,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26964 conditions, 3815 events. 2440/3815 cut-off events. For 139979/139988 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20588 event pairs, 506 based on Foata normal form. 10/3820 useless extension candidates. Maximal degree in co-relation 26851. Up to 3542 conditions per place. [2024-06-14 13:08:04,860 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-14 13:08:04,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 352 transitions, 5019 flow [2024-06-14 13:08:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:08:04,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 13:08:04,861 INFO L175 Difference]: Start difference. First operand has 241 places, 330 transitions, 4193 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:08:04,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 352 transitions, 5019 flow [2024-06-14 13:08:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 352 transitions, 4889 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:05,216 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 4187 flow [2024-06-14 13:08:05,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4187, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-14 13:08:05,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-14 13:08:05,217 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 4187 flow [2024-06-14 13:08:05,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:05,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:05,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:08:05,217 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:05,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2004483221, now seen corresponding path program 8 times [2024-06-14 13:08:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:05,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231833516] [2024-06-14 13:08:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:05,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:05,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231833516] [2024-06-14 13:08:05,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231833516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:05,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:05,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:05,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95533374] [2024-06-14 13:08:05,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:05,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:06,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:06,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 4187 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:06,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:06,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:06,781 INFO L124 PetriNetUnfolderBase]: 2460/3847 cut-off events. [2024-06-14 13:08:06,781 INFO L125 PetriNetUnfolderBase]: For 142214/142223 co-relation queries the response was YES. [2024-06-14 13:08:06,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 3847 events. 2460/3847 cut-off events. For 142214/142223 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20794 event pairs, 499 based on Foata normal form. 10/3852 useless extension candidates. Maximal degree in co-relation 26745. Up to 3437 conditions per place. [2024-06-14 13:08:06,824 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 84 changer transitions 0/354 dead transitions. [2024-06-14 13:08:06,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 354 transitions, 5166 flow [2024-06-14 13:08:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:08:06,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 13:08:06,825 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 4187 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:08:06,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 354 transitions, 5166 flow [2024-06-14 13:08:07,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 354 transitions, 5067 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:07,083 INFO L231 Difference]: Finished difference. Result has 246 places, 333 transitions, 4332 flow [2024-06-14 13:08:07,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4092, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4332, PETRI_PLACES=246, PETRI_TRANSITIONS=333} [2024-06-14 13:08:07,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:08:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 333 transitions, 4332 flow [2024-06-14 13:08:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:07,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:07,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:08:07,085 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2062179305, now seen corresponding path program 9 times [2024-06-14 13:08:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270207078] [2024-06-14 13:08:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:07,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270207078] [2024-06-14 13:08:07,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270207078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:07,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:07,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:07,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787207225] [2024-06-14 13:08:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:07,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:07,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 333 transitions, 4332 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:07,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:07,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:07,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:08,513 INFO L124 PetriNetUnfolderBase]: 2480/3878 cut-off events. [2024-06-14 13:08:08,513 INFO L125 PetriNetUnfolderBase]: For 138641/138650 co-relation queries the response was YES. [2024-06-14 13:08:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27166 conditions, 3878 events. 2480/3878 cut-off events. For 138641/138650 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21004 event pairs, 520 based on Foata normal form. 10/3883 useless extension candidates. Maximal degree in co-relation 27050. Up to 3672 conditions per place. [2024-06-14 13:08:08,554 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 38 changer transitions 0/352 dead transitions. [2024-06-14 13:08:08,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 352 transitions, 5275 flow [2024-06-14 13:08:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:08:08,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 13:08:08,555 INFO L175 Difference]: Start difference. First operand has 246 places, 333 transitions, 4332 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:08:08,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 352 transitions, 5275 flow [2024-06-14 13:08:08,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 352 transitions, 5090 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:08,834 INFO L231 Difference]: Finished difference. Result has 247 places, 336 transitions, 4299 flow [2024-06-14 13:08:08,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4299, PETRI_PLACES=247, PETRI_TRANSITIONS=336} [2024-06-14 13:08:08,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-14 13:08:08,834 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 336 transitions, 4299 flow [2024-06-14 13:08:08,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:08,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:08,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:08,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:08:08,835 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:08,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2067893225, now seen corresponding path program 10 times [2024-06-14 13:08:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774905872] [2024-06-14 13:08:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774905872] [2024-06-14 13:08:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774905872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:09,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654864411] [2024-06-14 13:08:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:09,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:09,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 336 transitions, 4299 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:09,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:09,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:10,259 INFO L124 PetriNetUnfolderBase]: 2468/3862 cut-off events. [2024-06-14 13:08:10,259 INFO L125 PetriNetUnfolderBase]: For 134658/134667 co-relation queries the response was YES. [2024-06-14 13:08:10,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26530 conditions, 3862 events. 2468/3862 cut-off events. For 134658/134667 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20916 event pairs, 522 based on Foata normal form. 10/3867 useless extension candidates. Maximal degree in co-relation 26415. Up to 3700 conditions per place. [2024-06-14 13:08:10,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 315 selfloop transitions, 30 changer transitions 0/349 dead transitions. [2024-06-14 13:08:10,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 349 transitions, 5056 flow [2024-06-14 13:08:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 13:08:10,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 13:08:10,301 INFO L175 Difference]: Start difference. First operand has 247 places, 336 transitions, 4299 flow. Second operand 7 states and 117 transitions. [2024-06-14 13:08:10,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 349 transitions, 5056 flow [2024-06-14 13:08:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 349 transitions, 4812 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:10,617 INFO L231 Difference]: Finished difference. Result has 248 places, 336 transitions, 4121 flow [2024-06-14 13:08:10,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4121, PETRI_PLACES=248, PETRI_TRANSITIONS=336} [2024-06-14 13:08:10,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 13:08:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 336 transitions, 4121 flow [2024-06-14 13:08:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:10,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:10,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:10,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:08:10,618 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:10,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2067466727, now seen corresponding path program 2 times [2024-06-14 13:08:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:10,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4312495] [2024-06-14 13:08:10,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:10,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4312495] [2024-06-14 13:08:11,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4312495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:11,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562667734] [2024-06-14 13:08:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:11,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:11,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 336 transitions, 4121 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:11,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:11,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:11,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:12,362 INFO L124 PetriNetUnfolderBase]: 2542/3972 cut-off events. [2024-06-14 13:08:12,362 INFO L125 PetriNetUnfolderBase]: For 148406/148408 co-relation queries the response was YES. [2024-06-14 13:08:12,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27186 conditions, 3972 events. 2542/3972 cut-off events. For 148406/148408 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21541 event pairs, 530 based on Foata normal form. 8/3971 useless extension candidates. Maximal degree in co-relation 27072. Up to 3573 conditions per place. [2024-06-14 13:08:12,397 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 311 selfloop transitions, 45 changer transitions 0/360 dead transitions. [2024-06-14 13:08:12,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 360 transitions, 5109 flow [2024-06-14 13:08:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:08:12,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:08:12,398 INFO L175 Difference]: Start difference. First operand has 248 places, 336 transitions, 4121 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:08:12,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 360 transitions, 5109 flow [2024-06-14 13:08:12,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 360 transitions, 4971 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:12,724 INFO L231 Difference]: Finished difference. Result has 248 places, 338 transitions, 4107 flow [2024-06-14 13:08:12,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3983, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4107, PETRI_PLACES=248, PETRI_TRANSITIONS=338} [2024-06-14 13:08:12,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 13:08:12,725 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 338 transitions, 4107 flow [2024-06-14 13:08:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:12,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:12,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:12,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:08:12,725 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2054074727, now seen corresponding path program 3 times [2024-06-14 13:08:12,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:12,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135918908] [2024-06-14 13:08:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:13,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135918908] [2024-06-14 13:08:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135918908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:13,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110473245] [2024-06-14 13:08:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:13,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 338 transitions, 4107 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:13,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:14,530 INFO L124 PetriNetUnfolderBase]: 2514/3932 cut-off events. [2024-06-14 13:08:14,530 INFO L125 PetriNetUnfolderBase]: For 147900/147902 co-relation queries the response was YES. [2024-06-14 13:08:14,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26529 conditions, 3932 events. 2514/3932 cut-off events. For 147900/147902 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21320 event pairs, 530 based on Foata normal form. 12/3935 useless extension candidates. Maximal degree in co-relation 26415. Up to 3651 conditions per place. [2024-06-14 13:08:14,566 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 310 selfloop transitions, 43 changer transitions 0/357 dead transitions. [2024-06-14 13:08:14,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 357 transitions, 4955 flow [2024-06-14 13:08:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:08:14,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:08:14,567 INFO L175 Difference]: Start difference. First operand has 248 places, 338 transitions, 4107 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:08:14,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 357 transitions, 4955 flow [2024-06-14 13:08:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 357 transitions, 4901 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:14,833 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4144 flow [2024-06-14 13:08:14,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4144, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-14 13:08:14,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:08:14,834 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4144 flow [2024-06-14 13:08:14,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:14,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:14,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:08:14,834 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:14,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1681271711, now seen corresponding path program 1 times [2024-06-14 13:08:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916415017] [2024-06-14 13:08:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916415017] [2024-06-14 13:08:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916415017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:15,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628110265] [2024-06-14 13:08:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:15,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:15,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:15,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:15,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:08:15,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4144 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:15,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:15,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:08:15,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:16,628 INFO L124 PetriNetUnfolderBase]: 2452/3861 cut-off events. [2024-06-14 13:08:16,628 INFO L125 PetriNetUnfolderBase]: For 146314/146353 co-relation queries the response was YES. [2024-06-14 13:08:16,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26266 conditions, 3861 events. 2452/3861 cut-off events. For 146314/146353 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21196 event pairs, 456 based on Foata normal form. 10/3847 useless extension candidates. Maximal degree in co-relation 26150. Up to 3443 conditions per place. [2024-06-14 13:08:16,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 70 changer transitions 0/394 dead transitions. [2024-06-14 13:08:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 394 transitions, 5402 flow [2024-06-14 13:08:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:08:16,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:08:16,668 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4144 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:08:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 394 transitions, 5402 flow [2024-06-14 13:08:16,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 394 transitions, 5306 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:16,943 INFO L231 Difference]: Finished difference. Result has 258 places, 366 transitions, 4653 flow [2024-06-14 13:08:16,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4653, PETRI_PLACES=258, PETRI_TRANSITIONS=366} [2024-06-14 13:08:16,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 13:08:16,943 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 366 transitions, 4653 flow [2024-06-14 13:08:16,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:16,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:16,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:16,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:08:16,944 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:16,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:16,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1134148031, now seen corresponding path program 1 times [2024-06-14 13:08:16,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:16,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698248044] [2024-06-14 13:08:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:16,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698248044] [2024-06-14 13:08:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698248044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:17,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:17,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243263491] [2024-06-14 13:08:17,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:17,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:17,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 366 transitions, 4653 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:17,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:17,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:17,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:18,722 INFO L124 PetriNetUnfolderBase]: 2545/3979 cut-off events. [2024-06-14 13:08:18,722 INFO L125 PetriNetUnfolderBase]: For 151836/151838 co-relation queries the response was YES. [2024-06-14 13:08:18,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27540 conditions, 3979 events. 2545/3979 cut-off events. For 151836/151838 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21730 event pairs, 582 based on Foata normal form. 2/3979 useless extension candidates. Maximal degree in co-relation 27420. Up to 3703 conditions per place. [2024-06-14 13:08:18,764 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 71 changer transitions 0/412 dead transitions. [2024-06-14 13:08:18,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 412 transitions, 5978 flow [2024-06-14 13:08:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:08:18,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:08:18,766 INFO L175 Difference]: Start difference. First operand has 258 places, 366 transitions, 4653 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:08:18,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 412 transitions, 5978 flow [2024-06-14 13:08:19,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 412 transitions, 5883 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 13:08:19,216 INFO L231 Difference]: Finished difference. Result has 268 places, 383 transitions, 4987 flow [2024-06-14 13:08:19,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4987, PETRI_PLACES=268, PETRI_TRANSITIONS=383} [2024-06-14 13:08:19,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 13:08:19,217 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 383 transitions, 4987 flow [2024-06-14 13:08:19,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:19,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:19,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:19,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:08:19,217 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:19,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1134147907, now seen corresponding path program 2 times [2024-06-14 13:08:19,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:19,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635553336] [2024-06-14 13:08:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:19,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:20,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:20,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635553336] [2024-06-14 13:08:20,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635553336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:20,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:20,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:20,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165531843] [2024-06-14 13:08:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:20,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:20,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:20,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:08:20,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 383 transitions, 4987 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:20,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:20,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:08:20,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:20,973 INFO L124 PetriNetUnfolderBase]: 2491/3916 cut-off events. [2024-06-14 13:08:20,973 INFO L125 PetriNetUnfolderBase]: For 160948/160987 co-relation queries the response was YES. [2024-06-14 13:08:21,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27655 conditions, 3916 events. 2491/3916 cut-off events. For 160948/160987 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21502 event pairs, 498 based on Foata normal form. 10/3902 useless extension candidates. Maximal degree in co-relation 27530. Up to 3549 conditions per place. [2024-06-14 13:08:21,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 77 changer transitions 0/411 dead transitions. [2024-06-14 13:08:21,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 411 transitions, 5878 flow [2024-06-14 13:08:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:08:21,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:08:21,025 INFO L175 Difference]: Start difference. First operand has 268 places, 383 transitions, 4987 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:08:21,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 411 transitions, 5878 flow [2024-06-14 13:08:21,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 411 transitions, 5757 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:21,502 INFO L231 Difference]: Finished difference. Result has 273 places, 388 transitions, 5082 flow [2024-06-14 13:08:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5082, PETRI_PLACES=273, PETRI_TRANSITIONS=388} [2024-06-14 13:08:21,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 13:08:21,503 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 388 transitions, 5082 flow [2024-06-14 13:08:21,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:21,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:21,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:08:21,503 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:21,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1684128795, now seen corresponding path program 2 times [2024-06-14 13:08:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:21,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369036391] [2024-06-14 13:08:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369036391] [2024-06-14 13:08:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369036391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:22,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:22,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855295972] [2024-06-14 13:08:22,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:22,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:22,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:22,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 388 transitions, 5082 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:22,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:22,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:22,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:23,410 INFO L124 PetriNetUnfolderBase]: 2576/4024 cut-off events. [2024-06-14 13:08:23,410 INFO L125 PetriNetUnfolderBase]: For 165092/165094 co-relation queries the response was YES. [2024-06-14 13:08:23,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28565 conditions, 4024 events. 2576/4024 cut-off events. For 165092/165094 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21988 event pairs, 581 based on Foata normal form. 2/4024 useless extension candidates. Maximal degree in co-relation 28439. Up to 3812 conditions per place. [2024-06-14 13:08:23,456 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 354 selfloop transitions, 57 changer transitions 0/415 dead transitions. [2024-06-14 13:08:23,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 415 transitions, 6040 flow [2024-06-14 13:08:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:08:23,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-14 13:08:23,457 INFO L175 Difference]: Start difference. First operand has 273 places, 388 transitions, 5082 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:08:23,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 415 transitions, 6040 flow [2024-06-14 13:08:23,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 415 transitions, 5872 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:23,885 INFO L231 Difference]: Finished difference. Result has 278 places, 393 transitions, 5101 flow [2024-06-14 13:08:23,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5101, PETRI_PLACES=278, PETRI_TRANSITIONS=393} [2024-06-14 13:08:23,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 13:08:23,886 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 393 transitions, 5101 flow [2024-06-14 13:08:23,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:23,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:23,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:23,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:08:23,886 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1684128671, now seen corresponding path program 3 times [2024-06-14 13:08:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975468940] [2024-06-14 13:08:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:24,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975468940] [2024-06-14 13:08:24,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975468940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:24,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:24,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389750196] [2024-06-14 13:08:24,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:24,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:08:24,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 393 transitions, 5101 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:24,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:24,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:08:24,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:25,810 INFO L124 PetriNetUnfolderBase]: 2563/4022 cut-off events. [2024-06-14 13:08:25,810 INFO L125 PetriNetUnfolderBase]: For 184765/184804 co-relation queries the response was YES. [2024-06-14 13:08:25,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28498 conditions, 4022 events. 2563/4022 cut-off events. For 184765/184804 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22125 event pairs, 506 based on Foata normal form. 20/4018 useless extension candidates. Maximal degree in co-relation 28370. Up to 3551 conditions per place. [2024-06-14 13:08:25,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 96 changer transitions 0/424 dead transitions. [2024-06-14 13:08:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 424 transitions, 6072 flow [2024-06-14 13:08:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:08:25,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:08:25,855 INFO L175 Difference]: Start difference. First operand has 278 places, 393 transitions, 5101 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:08:25,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 424 transitions, 6072 flow [2024-06-14 13:08:26,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 424 transitions, 5987 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:26,339 INFO L231 Difference]: Finished difference. Result has 282 places, 399 transitions, 5304 flow [2024-06-14 13:08:26,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5304, PETRI_PLACES=282, PETRI_TRANSITIONS=399} [2024-06-14 13:08:26,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 13:08:26,339 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 399 transitions, 5304 flow [2024-06-14 13:08:26,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:26,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:26,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:26,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:08:26,340 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:26,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1799604539, now seen corresponding path program 1 times [2024-06-14 13:08:26,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:26,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954575357] [2024-06-14 13:08:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954575357] [2024-06-14 13:08:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954575357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:27,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:27,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:27,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207984737] [2024-06-14 13:08:27,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:27,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:27,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 399 transitions, 5304 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:27,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:27,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:27,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:28,091 INFO L124 PetriNetUnfolderBase]: 2641/4123 cut-off events. [2024-06-14 13:08:28,091 INFO L125 PetriNetUnfolderBase]: For 178070/178072 co-relation queries the response was YES. [2024-06-14 13:08:28,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29636 conditions, 4123 events. 2641/4123 cut-off events. For 178070/178072 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22616 event pairs, 591 based on Foata normal form. 2/4123 useless extension candidates. Maximal degree in co-relation 29505. Up to 3978 conditions per place. [2024-06-14 13:08:28,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 28 changer transitions 0/417 dead transitions. [2024-06-14 13:08:28,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 417 transitions, 6210 flow [2024-06-14 13:08:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:08:28,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 13:08:28,140 INFO L175 Difference]: Start difference. First operand has 282 places, 399 transitions, 5304 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:08:28,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 417 transitions, 6210 flow [2024-06-14 13:08:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 417 transitions, 6017 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:28,704 INFO L231 Difference]: Finished difference. Result has 284 places, 401 transitions, 5202 flow [2024-06-14 13:08:28,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5202, PETRI_PLACES=284, PETRI_TRANSITIONS=401} [2024-06-14 13:08:28,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 13:08:28,705 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 401 transitions, 5202 flow [2024-06-14 13:08:28,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:28,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:28,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:28,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:08:28,705 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:28,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1799424615, now seen corresponding path program 3 times [2024-06-14 13:08:28,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:28,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947093572] [2024-06-14 13:08:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:28,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:29,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947093572] [2024-06-14 13:08:29,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947093572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:29,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874626890] [2024-06-14 13:08:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:29,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:29,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 401 transitions, 5202 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:29,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:29,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:29,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:30,593 INFO L124 PetriNetUnfolderBase]: 2651/4137 cut-off events. [2024-06-14 13:08:30,593 INFO L125 PetriNetUnfolderBase]: For 183515/183517 co-relation queries the response was YES. [2024-06-14 13:08:30,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29704 conditions, 4137 events. 2651/4137 cut-off events. For 183515/183517 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22714 event pairs, 587 based on Foata normal form. 2/4137 useless extension candidates. Maximal degree in co-relation 29572. Up to 3967 conditions per place. [2024-06-14 13:08:30,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 377 selfloop transitions, 42 changer transitions 0/423 dead transitions. [2024-06-14 13:08:30,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 423 transitions, 6157 flow [2024-06-14 13:08:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:08:30,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:08:30,649 INFO L175 Difference]: Start difference. First operand has 284 places, 401 transitions, 5202 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:08:30,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 423 transitions, 6157 flow [2024-06-14 13:08:31,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 423 transitions, 6082 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:31,122 INFO L231 Difference]: Finished difference. Result has 287 places, 404 transitions, 5262 flow [2024-06-14 13:08:31,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5262, PETRI_PLACES=287, PETRI_TRANSITIONS=404} [2024-06-14 13:08:31,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 13:08:31,123 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 404 transitions, 5262 flow [2024-06-14 13:08:31,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:31,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:31,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:31,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:08:31,124 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:31,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1252413341, now seen corresponding path program 4 times [2024-06-14 13:08:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:31,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324587158] [2024-06-14 13:08:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324587158] [2024-06-14 13:08:32,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324587158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:32,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:32,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:32,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801698399] [2024-06-14 13:08:32,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:32,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:32,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:32,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 404 transitions, 5262 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:32,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:32,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:32,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:33,142 INFO L124 PetriNetUnfolderBase]: 2661/4151 cut-off events. [2024-06-14 13:08:33,142 INFO L125 PetriNetUnfolderBase]: For 190045/190047 co-relation queries the response was YES. [2024-06-14 13:08:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29958 conditions, 4151 events. 2661/4151 cut-off events. For 190045/190047 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22788 event pairs, 587 based on Foata normal form. 2/4151 useless extension candidates. Maximal degree in co-relation 29825. Up to 3987 conditions per place. [2024-06-14 13:08:33,193 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 386 selfloop transitions, 38 changer transitions 0/428 dead transitions. [2024-06-14 13:08:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 428 transitions, 6237 flow [2024-06-14 13:08:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:08:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:08:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:08:33,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:08:33,194 INFO L175 Difference]: Start difference. First operand has 287 places, 404 transitions, 5262 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:08:33,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 428 transitions, 6237 flow [2024-06-14 13:08:33,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 428 transitions, 6133 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:33,745 INFO L231 Difference]: Finished difference. Result has 291 places, 407 transitions, 5291 flow [2024-06-14 13:08:33,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5291, PETRI_PLACES=291, PETRI_TRANSITIONS=407} [2024-06-14 13:08:33,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 13:08:33,745 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 407 transitions, 5291 flow [2024-06-14 13:08:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:33,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:33,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:33,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:08:33,746 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:33,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1252235587, now seen corresponding path program 4 times [2024-06-14 13:08:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098517684] [2024-06-14 13:08:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:34,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:34,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098517684] [2024-06-14 13:08:34,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098517684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:34,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:34,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919312136] [2024-06-14 13:08:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:34,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:08:34,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 407 transitions, 5291 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:34,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:34,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:08:34,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:35,772 INFO L124 PetriNetUnfolderBase]: 2636/4134 cut-off events. [2024-06-14 13:08:35,772 INFO L125 PetriNetUnfolderBase]: For 213112/213145 co-relation queries the response was YES. [2024-06-14 13:08:35,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29847 conditions, 4134 events. 2636/4134 cut-off events. For 213112/213145 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22912 event pairs, 522 based on Foata normal form. 16/4120 useless extension candidates. Maximal degree in co-relation 29713. Up to 3618 conditions per place. [2024-06-14 13:08:35,820 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 106 changer transitions 0/431 dead transitions. [2024-06-14 13:08:35,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 431 transitions, 6237 flow [2024-06-14 13:08:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:08:35,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:08:35,821 INFO L175 Difference]: Start difference. First operand has 291 places, 407 transitions, 5291 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:08:35,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 431 transitions, 6237 flow [2024-06-14 13:08:36,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 431 transitions, 6148 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:36,323 INFO L231 Difference]: Finished difference. Result has 292 places, 410 transitions, 5481 flow [2024-06-14 13:08:36,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5481, PETRI_PLACES=292, PETRI_TRANSITIONS=410} [2024-06-14 13:08:36,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 13:08:36,324 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 410 transitions, 5481 flow [2024-06-14 13:08:36,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:36,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:36,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:08:36,324 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:36,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash 176631031, now seen corresponding path program 5 times [2024-06-14 13:08:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490320397] [2024-06-14 13:08:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:37,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:37,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490320397] [2024-06-14 13:08:37,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490320397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:37,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:37,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046138340] [2024-06-14 13:08:37,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:37,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:37,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:37,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:37,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 410 transitions, 5481 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:37,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:37,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:37,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:38,299 INFO L124 PetriNetUnfolderBase]: 2723/4245 cut-off events. [2024-06-14 13:08:38,299 INFO L125 PetriNetUnfolderBase]: For 205014/205016 co-relation queries the response was YES. [2024-06-14 13:08:38,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31073 conditions, 4245 events. 2723/4245 cut-off events. For 205014/205016 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23385 event pairs, 591 based on Foata normal form. 2/4245 useless extension candidates. Maximal degree in co-relation 30938. Up to 4064 conditions per place. [2024-06-14 13:08:38,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 386 selfloop transitions, 46 changer transitions 0/436 dead transitions. [2024-06-14 13:08:38,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 436 transitions, 6511 flow [2024-06-14 13:08:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:08:38,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-14 13:08:38,352 INFO L175 Difference]: Start difference. First operand has 292 places, 410 transitions, 5481 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:08:38,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 436 transitions, 6511 flow [2024-06-14 13:08:38,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 436 transitions, 6280 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:38,997 INFO L231 Difference]: Finished difference. Result has 296 places, 415 transitions, 5446 flow [2024-06-14 13:08:38,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5446, PETRI_PLACES=296, PETRI_TRANSITIONS=415} [2024-06-14 13:08:38,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:08:38,997 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 415 transitions, 5446 flow [2024-06-14 13:08:38,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:38,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:38,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:08:38,998 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:38,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2004717147, now seen corresponding path program 6 times [2024-06-14 13:08:38,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:38,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355892366] [2024-06-14 13:08:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:39,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355892366] [2024-06-14 13:08:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355892366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:39,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646195448] [2024-06-14 13:08:39,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:39,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:39,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 415 transitions, 5446 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:39,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:39,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:39,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:40,992 INFO L124 PetriNetUnfolderBase]: 2741/4270 cut-off events. [2024-06-14 13:08:40,992 INFO L125 PetriNetUnfolderBase]: For 211686/211688 co-relation queries the response was YES. [2024-06-14 13:08:41,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31233 conditions, 4270 events. 2741/4270 cut-off events. For 211686/211688 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23531 event pairs, 607 based on Foata normal form. 2/4270 useless extension candidates. Maximal degree in co-relation 31096. Up to 4069 conditions per place. [2024-06-14 13:08:41,043 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 400 selfloop transitions, 44 changer transitions 0/448 dead transitions. [2024-06-14 13:08:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 6668 flow [2024-06-14 13:08:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:08:41,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 13:08:41,045 INFO L175 Difference]: Start difference. First operand has 296 places, 415 transitions, 5446 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:08:41,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 6668 flow [2024-06-14 13:08:41,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 448 transitions, 6588 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:41,769 INFO L231 Difference]: Finished difference. Result has 300 places, 422 transitions, 5604 flow [2024-06-14 13:08:41,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5604, PETRI_PLACES=300, PETRI_TRANSITIONS=422} [2024-06-14 13:08:41,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-14 13:08:41,770 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 422 transitions, 5604 flow [2024-06-14 13:08:41,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:41,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:41,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:08:41,770 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:41,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2053593545, now seen corresponding path program 2 times [2024-06-14 13:08:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:41,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769750960] [2024-06-14 13:08:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769750960] [2024-06-14 13:08:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769750960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:42,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:42,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:42,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143317716] [2024-06-14 13:08:42,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:42,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:42,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:42,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:42,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 422 transitions, 5604 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:42,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:42,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:42,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:43,569 INFO L124 PetriNetUnfolderBase]: 2749/4282 cut-off events. [2024-06-14 13:08:43,569 INFO L125 PetriNetUnfolderBase]: For 218395/218397 co-relation queries the response was YES. [2024-06-14 13:08:43,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31561 conditions, 4282 events. 2749/4282 cut-off events. For 218395/218397 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23563 event pairs, 607 based on Foata normal form. 2/4282 useless extension candidates. Maximal degree in co-relation 31421. Up to 4159 conditions per place. [2024-06-14 13:08:43,708 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 414 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2024-06-14 13:08:43,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 435 transitions, 6524 flow [2024-06-14 13:08:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:08:43,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 13:08:43,709 INFO L175 Difference]: Start difference. First operand has 300 places, 422 transitions, 5604 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:08:43,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 435 transitions, 6524 flow [2024-06-14 13:08:44,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6450 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:44,240 INFO L231 Difference]: Finished difference. Result has 303 places, 424 transitions, 5603 flow [2024-06-14 13:08:44,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5603, PETRI_PLACES=303, PETRI_TRANSITIONS=424} [2024-06-14 13:08:44,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-14 13:08:44,241 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 424 transitions, 5603 flow [2024-06-14 13:08:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:44,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:44,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:08:44,241 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:44,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2062164425, now seen corresponding path program 3 times [2024-06-14 13:08:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337358354] [2024-06-14 13:08:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:45,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337358354] [2024-06-14 13:08:45,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337358354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:45,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:45,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:45,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849853948] [2024-06-14 13:08:45,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:45,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:45,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:45,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:45,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 424 transitions, 5603 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:45,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:45,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:45,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:45,981 INFO L124 PetriNetUnfolderBase]: 2757/4294 cut-off events. [2024-06-14 13:08:45,981 INFO L125 PetriNetUnfolderBase]: For 225737/225739 co-relation queries the response was YES. [2024-06-14 13:08:46,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31840 conditions, 4294 events. 2757/4294 cut-off events. For 225737/225739 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23689 event pairs, 613 based on Foata normal form. 2/4294 useless extension candidates. Maximal degree in co-relation 31698. Up to 4176 conditions per place. [2024-06-14 13:08:46,034 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 417 selfloop transitions, 16 changer transitions 0/437 dead transitions. [2024-06-14 13:08:46,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 437 transitions, 6537 flow [2024-06-14 13:08:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:08:46,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 13:08:46,035 INFO L175 Difference]: Start difference. First operand has 303 places, 424 transitions, 5603 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:08:46,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 437 transitions, 6537 flow [2024-06-14 13:08:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 437 transitions, 6480 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:46,672 INFO L231 Difference]: Finished difference. Result has 305 places, 426 transitions, 5621 flow [2024-06-14 13:08:46,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5621, PETRI_PLACES=305, PETRI_TRANSITIONS=426} [2024-06-14 13:08:46,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 13:08:46,672 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 426 transitions, 5621 flow [2024-06-14 13:08:46,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:46,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:46,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:46,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:08:46,673 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:46,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2004717023, now seen corresponding path program 5 times [2024-06-14 13:08:46,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929919669] [2024-06-14 13:08:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929919669] [2024-06-14 13:08:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929919669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:47,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855342347] [2024-06-14 13:08:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:47,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:08:47,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 426 transitions, 5621 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:47,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:47,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:08:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:48,678 INFO L124 PetriNetUnfolderBase]: 2701/4241 cut-off events. [2024-06-14 13:08:48,679 INFO L125 PetriNetUnfolderBase]: For 245353/245392 co-relation queries the response was YES. [2024-06-14 13:08:48,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31231 conditions, 4241 events. 2701/4241 cut-off events. For 245353/245392 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23635 event pairs, 478 based on Foata normal form. 20/4237 useless extension candidates. Maximal degree in co-relation 31088. Up to 3545 conditions per place. [2024-06-14 13:08:48,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 334 selfloop transitions, 83 changer transitions 0/458 dead transitions. [2024-06-14 13:08:48,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 458 transitions, 6624 flow [2024-06-14 13:08:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:08:48,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 13:08:48,731 INFO L175 Difference]: Start difference. First operand has 305 places, 426 transitions, 5621 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:08:48,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 458 transitions, 6624 flow [2024-06-14 13:08:49,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 458 transitions, 6535 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:49,399 INFO L231 Difference]: Finished difference. Result has 308 places, 427 transitions, 5741 flow [2024-06-14 13:08:49,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5741, PETRI_PLACES=308, PETRI_TRANSITIONS=427} [2024-06-14 13:08:49,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:08:49,399 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 427 transitions, 5741 flow [2024-06-14 13:08:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:49,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:49,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:49,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:08:49,400 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:49,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2062171369, now seen corresponding path program 7 times [2024-06-14 13:08:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:49,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277650628] [2024-06-14 13:08:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:49,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277650628] [2024-06-14 13:08:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277650628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:50,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:50,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:50,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201159938] [2024-06-14 13:08:50,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:50,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:50,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:50,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:50,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:50,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 427 transitions, 5741 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:50,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:50,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:50,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:51,379 INFO L124 PetriNetUnfolderBase]: 2793/4350 cut-off events. [2024-06-14 13:08:51,380 INFO L125 PetriNetUnfolderBase]: For 234966/234968 co-relation queries the response was YES. [2024-06-14 13:08:51,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4350 events. 2793/4350 cut-off events. For 234966/234968 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24040 event pairs, 619 based on Foata normal form. 2/4350 useless extension candidates. Maximal degree in co-relation 32416. Up to 4222 conditions per place. [2024-06-14 13:08:51,433 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 20 changer transitions 0/443 dead transitions. [2024-06-14 13:08:51,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 443 transitions, 6731 flow [2024-06-14 13:08:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:08:51,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:08:51,434 INFO L175 Difference]: Start difference. First operand has 308 places, 427 transitions, 5741 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:08:51,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 443 transitions, 6731 flow [2024-06-14 13:08:52,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 443 transitions, 6562 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:52,108 INFO L231 Difference]: Finished difference. Result has 310 places, 430 transitions, 5686 flow [2024-06-14 13:08:52,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5686, PETRI_PLACES=310, PETRI_TRANSITIONS=430} [2024-06-14 13:08:52,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:08:52,109 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 430 transitions, 5686 flow [2024-06-14 13:08:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:52,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:52,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:08:52,109 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:52,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2053890463, now seen corresponding path program 1 times [2024-06-14 13:08:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:52,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210869920] [2024-06-14 13:08:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210869920] [2024-06-14 13:08:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210869920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:52,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472994707] [2024-06-14 13:08:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:53,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:53,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 430 transitions, 5686 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:53,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:53,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:53,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:53,957 INFO L124 PetriNetUnfolderBase]: 2790/4346 cut-off events. [2024-06-14 13:08:53,957 INFO L125 PetriNetUnfolderBase]: For 237219/237221 co-relation queries the response was YES. [2024-06-14 13:08:53,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32283 conditions, 4346 events. 2790/4346 cut-off events. For 237219/237221 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24004 event pairs, 618 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 32138. Up to 4217 conditions per place. [2024-06-14 13:08:54,010 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 25 changer transitions 0/441 dead transitions. [2024-06-14 13:08:54,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 441 transitions, 6600 flow [2024-06-14 13:08:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:08:54,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:08:54,011 INFO L175 Difference]: Start difference. First operand has 310 places, 430 transitions, 5686 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:08:54,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 441 transitions, 6600 flow [2024-06-14 13:08:54,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 441 transitions, 6518 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:54,680 INFO L231 Difference]: Finished difference. Result has 312 places, 430 transitions, 5664 flow [2024-06-14 13:08:54,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5664, PETRI_PLACES=312, PETRI_TRANSITIONS=430} [2024-06-14 13:08:54,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 13:08:54,681 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 430 transitions, 5664 flow [2024-06-14 13:08:54,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:54,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:54,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:54,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:08:54,681 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:54,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash 505666749, now seen corresponding path program 4 times [2024-06-14 13:08:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729209718] [2024-06-14 13:08:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729209718] [2024-06-14 13:08:55,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729209718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:55,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:55,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534577514] [2024-06-14 13:08:55,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:55,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:55,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 430 transitions, 5664 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:55,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:55,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:56,611 INFO L124 PetriNetUnfolderBase]: 2798/4358 cut-off events. [2024-06-14 13:08:56,611 INFO L125 PetriNetUnfolderBase]: For 246099/246101 co-relation queries the response was YES. [2024-06-14 13:08:56,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32447 conditions, 4358 events. 2798/4358 cut-off events. For 246099/246101 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24065 event pairs, 600 based on Foata normal form. 2/4358 useless extension candidates. Maximal degree in co-relation 32301. Up to 4207 conditions per place. [2024-06-14 13:08:56,664 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 413 selfloop transitions, 30 changer transitions 0/447 dead transitions. [2024-06-14 13:08:56,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 6640 flow [2024-06-14 13:08:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:08:56,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 13:08:56,665 INFO L175 Difference]: Start difference. First operand has 312 places, 430 transitions, 5664 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:08:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 6640 flow [2024-06-14 13:08:57,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 447 transitions, 6557 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:57,297 INFO L231 Difference]: Finished difference. Result has 313 places, 432 transitions, 5691 flow [2024-06-14 13:08:57,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5691, PETRI_PLACES=313, PETRI_TRANSITIONS=432} [2024-06-14 13:08:57,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 13:08:57,298 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 432 transitions, 5691 flow [2024-06-14 13:08:57,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:57,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:57,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:08:57,298 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:57,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2053890215, now seen corresponding path program 5 times [2024-06-14 13:08:57,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210177060] [2024-06-14 13:08:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210177060] [2024-06-14 13:08:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210177060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:58,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:58,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:58,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514465525] [2024-06-14 13:08:58,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:58,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:58,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:08:58,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 432 transitions, 5691 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:58,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:58,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:08:58,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:59,118 INFO L124 PetriNetUnfolderBase]: 2793/4351 cut-off events. [2024-06-14 13:08:59,118 INFO L125 PetriNetUnfolderBase]: For 250441/250443 co-relation queries the response was YES. [2024-06-14 13:08:59,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32535 conditions, 4351 events. 2793/4351 cut-off events. For 250441/250443 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24086 event pairs, 617 based on Foata normal form. 2/4351 useless extension candidates. Maximal degree in co-relation 32388. Up to 4221 conditions per place. [2024-06-14 13:08:59,167 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 418 selfloop transitions, 23 changer transitions 0/445 dead transitions. [2024-06-14 13:08:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 445 transitions, 6649 flow [2024-06-14 13:08:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:08:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 13:08:59,168 INFO L175 Difference]: Start difference. First operand has 313 places, 432 transitions, 5691 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:08:59,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 445 transitions, 6649 flow [2024-06-14 13:08:59,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 445 transitions, 6555 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:59,838 INFO L231 Difference]: Finished difference. Result has 315 places, 434 transitions, 5697 flow [2024-06-14 13:08:59,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5697, PETRI_PLACES=315, PETRI_TRANSITIONS=434} [2024-06-14 13:08:59,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:08:59,838 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 434 transitions, 5697 flow [2024-06-14 13:08:59,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:59,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:59,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:59,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:08:59,839 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:59,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2004894777, now seen corresponding path program 8 times [2024-06-14 13:08:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:59,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590705756] [2024-06-14 13:08:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:00,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590705756] [2024-06-14 13:09:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590705756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363025025] [2024-06-14 13:09:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:00,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:00,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 434 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:00,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:00,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:00,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:01,716 INFO L124 PetriNetUnfolderBase]: 2787/4343 cut-off events. [2024-06-14 13:09:01,717 INFO L125 PetriNetUnfolderBase]: For 246119/246121 co-relation queries the response was YES. [2024-06-14 13:09:01,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32259 conditions, 4343 events. 2787/4343 cut-off events. For 246119/246121 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24041 event pairs, 610 based on Foata normal form. 2/4343 useless extension candidates. Maximal degree in co-relation 32111. Up to 4162 conditions per place. [2024-06-14 13:09:01,863 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 42 changer transitions 0/452 dead transitions. [2024-06-14 13:09:01,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 452 transitions, 6679 flow [2024-06-14 13:09:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:09:01,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:09:01,864 INFO L175 Difference]: Start difference. First operand has 315 places, 434 transitions, 5697 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:09:01,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 452 transitions, 6679 flow [2024-06-14 13:09:02,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 452 transitions, 6563 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:02,514 INFO L231 Difference]: Finished difference. Result has 318 places, 435 transitions, 5691 flow [2024-06-14 13:09:02,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5691, PETRI_PLACES=318, PETRI_TRANSITIONS=435} [2024-06-14 13:09:02,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 13:09:02,514 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 435 transitions, 5691 flow [2024-06-14 13:09:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:02,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:02,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:09:02,515 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -580275227, now seen corresponding path program 1 times [2024-06-14 13:09:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:02,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962869330] [2024-06-14 13:09:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:03,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962869330] [2024-06-14 13:09:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962869330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580078109] [2024-06-14 13:09:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:03,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:03,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 435 transitions, 5691 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:03,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:03,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:03,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:04,494 INFO L124 PetriNetUnfolderBase]: 2813/4381 cut-off events. [2024-06-14 13:09:04,495 INFO L125 PetriNetUnfolderBase]: For 249546/249548 co-relation queries the response was YES. [2024-06-14 13:09:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32531 conditions, 4381 events. 2813/4381 cut-off events. For 249546/249548 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24229 event pairs, 514 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 32382. Up to 3988 conditions per place. [2024-06-14 13:09:04,552 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 365 selfloop transitions, 96 changer transitions 0/465 dead transitions. [2024-06-14 13:09:04,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 465 transitions, 6996 flow [2024-06-14 13:09:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:09:04,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:09:04,553 INFO L175 Difference]: Start difference. First operand has 318 places, 435 transitions, 5691 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:09:04,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 465 transitions, 6996 flow [2024-06-14 13:09:05,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 465 transitions, 6904 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:05,265 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 5972 flow [2024-06-14 13:09:05,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5972, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-06-14 13:09:05,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:09:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 5972 flow [2024-06-14 13:09:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:05,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:05,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:05,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:09:05,266 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:05,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash 972540257, now seen corresponding path program 2 times [2024-06-14 13:09:05,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:05,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43711936] [2024-06-14 13:09:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:05,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43711936] [2024-06-14 13:09:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43711936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:06,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:06,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528599769] [2024-06-14 13:09:06,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:06,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:06,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:06,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:06,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:06,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 5972 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:06,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:06,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:06,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:07,179 INFO L124 PetriNetUnfolderBase]: 2823/4391 cut-off events. [2024-06-14 13:09:07,179 INFO L125 PetriNetUnfolderBase]: For 260469/260471 co-relation queries the response was YES. [2024-06-14 13:09:07,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33433 conditions, 4391 events. 2823/4391 cut-off events. For 260469/260471 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24207 event pairs, 532 based on Foata normal form. 2/4384 useless extension candidates. Maximal degree in co-relation 33282. Up to 4163 conditions per place. [2024-06-14 13:09:07,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 46 changer transitions 0/457 dead transitions. [2024-06-14 13:09:07,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 457 transitions, 6994 flow [2024-06-14 13:09:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:09:07,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 13:09:07,239 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 5972 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:09:07,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 457 transitions, 6994 flow [2024-06-14 13:09:08,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 457 transitions, 6897 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:08,111 INFO L231 Difference]: Finished difference. Result has 324 places, 447 transitions, 6051 flow [2024-06-14 13:09:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6051, PETRI_PLACES=324, PETRI_TRANSITIONS=447} [2024-06-14 13:09:08,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:09:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 447 transitions, 6051 flow [2024-06-14 13:09:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:08,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:08,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:08,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:09:08,112 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:08,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash 972303107, now seen corresponding path program 3 times [2024-06-14 13:09:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278380259] [2024-06-14 13:09:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:09,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:09,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278380259] [2024-06-14 13:09:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278380259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:09,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:09,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6615410] [2024-06-14 13:09:09,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:09,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:09,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:09,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:09,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 447 transitions, 6051 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:09,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:09,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:09,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:10,125 INFO L124 PetriNetUnfolderBase]: 2817/4385 cut-off events. [2024-06-14 13:09:10,126 INFO L125 PetriNetUnfolderBase]: For 263679/263681 co-relation queries the response was YES. [2024-06-14 13:09:10,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33455 conditions, 4385 events. 2817/4385 cut-off events. For 263679/263681 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24158 event pairs, 513 based on Foata normal form. 2/4378 useless extension candidates. Maximal degree in co-relation 33302. Up to 3993 conditions per place. [2024-06-14 13:09:10,192 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 96 changer transitions 0/465 dead transitions. [2024-06-14 13:09:10,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 465 transitions, 7084 flow [2024-06-14 13:09:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:09:10,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-14 13:09:10,193 INFO L175 Difference]: Start difference. First operand has 324 places, 447 transitions, 6051 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:09:10,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 465 transitions, 7084 flow [2024-06-14 13:09:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 465 transitions, 6932 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:10,945 INFO L231 Difference]: Finished difference. Result has 325 places, 447 transitions, 6119 flow [2024-06-14 13:09:10,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6119, PETRI_PLACES=325, PETRI_TRANSITIONS=447} [2024-06-14 13:09:10,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 13:09:10,946 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 447 transitions, 6119 flow [2024-06-14 13:09:10,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:10,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:09:10,946 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:10,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2033938259, now seen corresponding path program 1 times [2024-06-14 13:09:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126777483] [2024-06-14 13:09:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126777483] [2024-06-14 13:09:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126777483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207766100] [2024-06-14 13:09:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:11,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:11,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 447 transitions, 6119 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:11,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:12,872 INFO L124 PetriNetUnfolderBase]: 2814/4385 cut-off events. [2024-06-14 13:09:12,872 INFO L125 PetriNetUnfolderBase]: For 259490/259492 co-relation queries the response was YES. [2024-06-14 13:09:12,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33481 conditions, 4385 events. 2814/4385 cut-off events. For 259490/259492 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24256 event pairs, 536 based on Foata normal form. 1/4377 useless extension candidates. Maximal degree in co-relation 33328. Up to 3979 conditions per place. [2024-06-14 13:09:12,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 361 selfloop transitions, 98 changer transitions 0/463 dead transitions. [2024-06-14 13:09:12,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 463 transitions, 7093 flow [2024-06-14 13:09:12,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:09:12,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 13:09:12,929 INFO L175 Difference]: Start difference. First operand has 325 places, 447 transitions, 6119 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:09:12,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 463 transitions, 7093 flow [2024-06-14 13:09:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 463 transitions, 6908 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:13,761 INFO L231 Difference]: Finished difference. Result has 325 places, 447 transitions, 6177 flow [2024-06-14 13:09:13,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6177, PETRI_PLACES=325, PETRI_TRANSITIONS=447} [2024-06-14 13:09:13,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 13:09:13,761 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 447 transitions, 6177 flow [2024-06-14 13:09:13,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:13,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:13,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:13,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:09:13,761 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:13,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1663960711, now seen corresponding path program 1 times [2024-06-14 13:09:13,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:13,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909955358] [2024-06-14 13:09:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:13,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:14,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909955358] [2024-06-14 13:09:14,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909955358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:14,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:14,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:14,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146146114] [2024-06-14 13:09:14,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:14,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:14,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:14,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:14,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 447 transitions, 6177 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:14,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:14,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:14,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:15,593 INFO L124 PetriNetUnfolderBase]: 2929/4553 cut-off events. [2024-06-14 13:09:15,593 INFO L125 PetriNetUnfolderBase]: For 268438/268447 co-relation queries the response was YES. [2024-06-14 13:09:15,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35046 conditions, 4553 events. 2929/4553 cut-off events. For 268438/268447 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25245 event pairs, 499 based on Foata normal form. 10/4558 useless extension candidates. Maximal degree in co-relation 34894. Up to 4098 conditions per place. [2024-06-14 13:09:15,650 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 395 selfloop transitions, 108 changer transitions 0/507 dead transitions. [2024-06-14 13:09:15,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 507 transitions, 8010 flow [2024-06-14 13:09:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:09:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:09:15,651 INFO L175 Difference]: Start difference. First operand has 325 places, 447 transitions, 6177 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:09:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 507 transitions, 8010 flow [2024-06-14 13:09:16,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 507 transitions, 7715 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:16,498 INFO L231 Difference]: Finished difference. Result has 330 places, 472 transitions, 6678 flow [2024-06-14 13:09:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6678, PETRI_PLACES=330, PETRI_TRANSITIONS=472} [2024-06-14 13:09:16,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 13:09:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 472 transitions, 6678 flow [2024-06-14 13:09:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:16,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:09:16,498 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1669094597, now seen corresponding path program 2 times [2024-06-14 13:09:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655941350] [2024-06-14 13:09:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:17,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655941350] [2024-06-14 13:09:17,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655941350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:17,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:17,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:17,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548433620] [2024-06-14 13:09:17,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:17,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:17,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:17,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:17,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:17,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 472 transitions, 6678 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:17,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:17,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:17,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:18,498 INFO L124 PetriNetUnfolderBase]: 2981/4635 cut-off events. [2024-06-14 13:09:18,498 INFO L125 PetriNetUnfolderBase]: For 280790/280799 co-relation queries the response was YES. [2024-06-14 13:09:18,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36390 conditions, 4635 events. 2981/4635 cut-off events. For 280790/280799 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25793 event pairs, 509 based on Foata normal form. 10/4640 useless extension candidates. Maximal degree in co-relation 36236. Up to 4282 conditions per place. [2024-06-14 13:09:18,559 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 426 selfloop transitions, 79 changer transitions 0/509 dead transitions. [2024-06-14 13:09:18,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 509 transitions, 8173 flow [2024-06-14 13:09:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:09:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 13:09:18,561 INFO L175 Difference]: Start difference. First operand has 330 places, 472 transitions, 6678 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:09:18,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 509 transitions, 8173 flow [2024-06-14 13:09:19,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 8010 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:19,408 INFO L231 Difference]: Finished difference. Result has 335 places, 480 transitions, 6866 flow [2024-06-14 13:09:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6866, PETRI_PLACES=335, PETRI_TRANSITIONS=480} [2024-06-14 13:09:19,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 13:09:19,409 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 480 transitions, 6866 flow [2024-06-14 13:09:19,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:19,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:19,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:09:19,409 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:19,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 145163423, now seen corresponding path program 3 times [2024-06-14 13:09:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347290526] [2024-06-14 13:09:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:19,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:20,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347290526] [2024-06-14 13:09:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347290526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:20,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:20,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157970355] [2024-06-14 13:09:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:20,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:20,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:20,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 480 transitions, 6866 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:20,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:20,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:21,441 INFO L124 PetriNetUnfolderBase]: 2969/4619 cut-off events. [2024-06-14 13:09:21,442 INFO L125 PetriNetUnfolderBase]: For 272297/272306 co-relation queries the response was YES. [2024-06-14 13:09:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 4619 events. 2969/4619 cut-off events. For 272297/272306 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25686 event pairs, 509 based on Foata normal form. 10/4624 useless extension candidates. Maximal degree in co-relation 35975. Up to 4274 conditions per place. [2024-06-14 13:09:21,503 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 82 changer transitions 0/510 dead transitions. [2024-06-14 13:09:21,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 510 transitions, 8088 flow [2024-06-14 13:09:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:09:21,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-14 13:09:21,504 INFO L175 Difference]: Start difference. First operand has 335 places, 480 transitions, 6866 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:09:21,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 510 transitions, 8088 flow [2024-06-14 13:09:22,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 510 transitions, 7949 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:22,480 INFO L231 Difference]: Finished difference. Result has 340 places, 480 transitions, 6901 flow [2024-06-14 13:09:22,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6901, PETRI_PLACES=340, PETRI_TRANSITIONS=480} [2024-06-14 13:09:22,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 13:09:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 480 transitions, 6901 flow [2024-06-14 13:09:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:22,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:22,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:09:22,481 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:22,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:22,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1951402515, now seen corresponding path program 4 times [2024-06-14 13:09:22,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:22,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018223737] [2024-06-14 13:09:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:22,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018223737] [2024-06-14 13:09:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018223737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500841794] [2024-06-14 13:09:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:23,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:23,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:23,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:23,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 480 transitions, 6901 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:23,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:23,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:23,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:24,442 INFO L124 PetriNetUnfolderBase]: 3021/4693 cut-off events. [2024-06-14 13:09:24,442 INFO L125 PetriNetUnfolderBase]: For 280658/280667 co-relation queries the response was YES. [2024-06-14 13:09:24,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37140 conditions, 4693 events. 3021/4693 cut-off events. For 280658/280667 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 26109 event pairs, 541 based on Foata normal form. 10/4698 useless extension candidates. Maximal degree in co-relation 36983. Up to 4299 conditions per place. [2024-06-14 13:09:24,501 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 432 selfloop transitions, 79 changer transitions 0/515 dead transitions. [2024-06-14 13:09:24,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 515 transitions, 8502 flow [2024-06-14 13:09:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:09:24,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:09:24,502 INFO L175 Difference]: Start difference. First operand has 340 places, 480 transitions, 6901 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:09:24,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 515 transitions, 8502 flow [2024-06-14 13:09:25,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 515 transitions, 8335 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:09:25,248 INFO L231 Difference]: Finished difference. Result has 340 places, 488 transitions, 7101 flow [2024-06-14 13:09:25,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7101, PETRI_PLACES=340, PETRI_TRANSITIONS=488} [2024-06-14 13:09:25,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 13:09:25,248 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 488 transitions, 7101 flow [2024-06-14 13:09:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:25,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:09:25,249 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:25,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1958754165, now seen corresponding path program 5 times [2024-06-14 13:09:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227551445] [2024-06-14 13:09:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227551445] [2024-06-14 13:09:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227551445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:25,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168594448] [2024-06-14 13:09:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:25,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:25,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:26,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:26,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 488 transitions, 7101 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:26,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:26,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:27,278 INFO L124 PetriNetUnfolderBase]: 3009/4662 cut-off events. [2024-06-14 13:09:27,279 INFO L125 PetriNetUnfolderBase]: For 273035/273044 co-relation queries the response was YES. [2024-06-14 13:09:27,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36887 conditions, 4662 events. 3009/4662 cut-off events. For 273035/273044 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25837 event pairs, 535 based on Foata normal form. 10/4667 useless extension candidates. Maximal degree in co-relation 36729. Up to 4464 conditions per place. [2024-06-14 13:09:27,332 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 36 changer transitions 0/503 dead transitions. [2024-06-14 13:09:27,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 503 transitions, 8200 flow [2024-06-14 13:09:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:09:27,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 13:09:27,333 INFO L175 Difference]: Start difference. First operand has 340 places, 488 transitions, 7101 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:09:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 503 transitions, 8200 flow [2024-06-14 13:09:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 503 transitions, 8046 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:28,150 INFO L231 Difference]: Finished difference. Result has 342 places, 488 transitions, 7029 flow [2024-06-14 13:09:28,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7029, PETRI_PLACES=342, PETRI_TRANSITIONS=488} [2024-06-14 13:09:28,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-14 13:09:28,151 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 488 transitions, 7029 flow [2024-06-14 13:09:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:28,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:28,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:09:28,151 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:28,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1959021292, now seen corresponding path program 1 times [2024-06-14 13:09:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442381979] [2024-06-14 13:09:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:28,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:28,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442381979] [2024-06-14 13:09:28,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442381979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:28,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:28,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:28,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194839648] [2024-06-14 13:09:28,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:28,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:28,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:29,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 488 transitions, 7029 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:29,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:29,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:30,164 INFO L124 PetriNetUnfolderBase]: 3019/4686 cut-off events. [2024-06-14 13:09:30,164 INFO L125 PetriNetUnfolderBase]: For 269880/269889 co-relation queries the response was YES. [2024-06-14 13:09:30,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4686 events. 3019/4686 cut-off events. For 269880/269889 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26025 event pairs, 538 based on Foata normal form. 8/4689 useless extension candidates. Maximal degree in co-relation 36632. Up to 4491 conditions per place. [2024-06-14 13:09:30,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 40 changer transitions 0/506 dead transitions. [2024-06-14 13:09:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 506 transitions, 8209 flow [2024-06-14 13:09:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:09:30,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:09:30,223 INFO L175 Difference]: Start difference. First operand has 342 places, 488 transitions, 7029 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:09:30,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 506 transitions, 8209 flow [2024-06-14 13:09:31,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 506 transitions, 8125 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:31,054 INFO L231 Difference]: Finished difference. Result has 344 places, 494 transitions, 7175 flow [2024-06-14 13:09:31,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7175, PETRI_PLACES=344, PETRI_TRANSITIONS=494} [2024-06-14 13:09:31,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 13:09:31,054 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 494 transitions, 7175 flow [2024-06-14 13:09:31,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:31,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:31,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:31,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:09:31,055 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:31,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash 144905883, now seen corresponding path program 6 times [2024-06-14 13:09:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:31,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146120176] [2024-06-14 13:09:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:31,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:31,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146120176] [2024-06-14 13:09:31,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146120176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:31,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:31,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445243954] [2024-06-14 13:09:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:31,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:31,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 494 transitions, 7175 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:31,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:31,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:31,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:32,990 INFO L124 PetriNetUnfolderBase]: 3007/4669 cut-off events. [2024-06-14 13:09:32,990 INFO L125 PetriNetUnfolderBase]: For 274713/274722 co-relation queries the response was YES. [2024-06-14 13:09:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 4669 events. 3007/4669 cut-off events. For 274713/274722 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25970 event pairs, 518 based on Foata normal form. 10/4674 useless extension candidates. Maximal degree in co-relation 36782. Up to 4297 conditions per place. [2024-06-14 13:09:33,054 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 434 selfloop transitions, 84 changer transitions 0/522 dead transitions. [2024-06-14 13:09:33,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 522 transitions, 8405 flow [2024-06-14 13:09:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:09:33,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 13:09:33,055 INFO L175 Difference]: Start difference. First operand has 344 places, 494 transitions, 7175 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:09:33,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 522 transitions, 8405 flow [2024-06-14 13:09:33,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 522 transitions, 8284 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:33,906 INFO L231 Difference]: Finished difference. Result has 349 places, 494 transitions, 7233 flow [2024-06-14 13:09:33,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7054, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7233, PETRI_PLACES=349, PETRI_TRANSITIONS=494} [2024-06-14 13:09:33,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-14 13:09:33,907 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 494 transitions, 7233 flow [2024-06-14 13:09:33,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:33,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:33,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:09:33,907 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:33,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2004264701, now seen corresponding path program 1 times [2024-06-14 13:09:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:33,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236928292] [2024-06-14 13:09:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:34,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:34,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236928292] [2024-06-14 13:09:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236928292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:34,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218359139] [2024-06-14 13:09:34,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:34,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:34,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:34,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:34,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:34,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 494 transitions, 7233 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:34,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:34,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:34,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:36,084 INFO L124 PetriNetUnfolderBase]: 3051/4728 cut-off events. [2024-06-14 13:09:36,084 INFO L125 PetriNetUnfolderBase]: For 290830/290832 co-relation queries the response was YES. [2024-06-14 13:09:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37504 conditions, 4728 events. 3051/4728 cut-off events. For 290830/290832 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26225 event pairs, 430 based on Foata normal form. 8/4727 useless extension candidates. Maximal degree in co-relation 37343. Up to 4266 conditions per place. [2024-06-14 13:09:36,149 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 56 changer transitions 0/524 dead transitions. [2024-06-14 13:09:36,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 524 transitions, 8615 flow [2024-06-14 13:09:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:09:36,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:09:36,150 INFO L175 Difference]: Start difference. First operand has 349 places, 494 transitions, 7233 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:09:36,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 524 transitions, 8615 flow [2024-06-14 13:09:37,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 524 transitions, 8360 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:37,171 INFO L231 Difference]: Finished difference. Result has 350 places, 499 transitions, 7156 flow [2024-06-14 13:09:37,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6980, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7156, PETRI_PLACES=350, PETRI_TRANSITIONS=499} [2024-06-14 13:09:37,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 13:09:37,172 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 499 transitions, 7156 flow [2024-06-14 13:09:37,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:37,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:37,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:37,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:09:37,172 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:37,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash -855053117, now seen corresponding path program 2 times [2024-06-14 13:09:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256909127] [2024-06-14 13:09:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:38,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:38,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256909127] [2024-06-14 13:09:38,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256909127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:38,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:38,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:38,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857554545] [2024-06-14 13:09:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:38,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:38,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:38,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 499 transitions, 7156 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:38,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:38,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:39,307 INFO L124 PetriNetUnfolderBase]: 3033/4702 cut-off events. [2024-06-14 13:09:39,307 INFO L125 PetriNetUnfolderBase]: For 273902/273904 co-relation queries the response was YES. [2024-06-14 13:09:39,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36590 conditions, 4702 events. 3033/4702 cut-off events. For 273902/273904 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26063 event pairs, 414 based on Foata normal form. 8/4701 useless extension candidates. Maximal degree in co-relation 36429. Up to 4258 conditions per place. [2024-06-14 13:09:39,373 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 460 selfloop transitions, 57 changer transitions 0/521 dead transitions. [2024-06-14 13:09:39,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 521 transitions, 8346 flow [2024-06-14 13:09:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:09:39,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 13:09:39,374 INFO L175 Difference]: Start difference. First operand has 350 places, 499 transitions, 7156 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:09:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 521 transitions, 8346 flow [2024-06-14 13:09:40,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 521 transitions, 8250 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:40,279 INFO L231 Difference]: Finished difference. Result has 353 places, 499 transitions, 7182 flow [2024-06-14 13:09:40,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7182, PETRI_PLACES=353, PETRI_TRANSITIONS=499} [2024-06-14 13:09:40,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 13:09:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 499 transitions, 7182 flow [2024-06-14 13:09:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:40,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:09:40,280 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:40,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1838841863, now seen corresponding path program 7 times [2024-06-14 13:09:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746478098] [2024-06-14 13:09:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:40,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:41,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746478098] [2024-06-14 13:09:41,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746478098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:41,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:41,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:41,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852522286] [2024-06-14 13:09:41,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:41,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:41,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:41,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 499 transitions, 7182 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:42,453 INFO L124 PetriNetUnfolderBase]: 3169/4908 cut-off events. [2024-06-14 13:09:42,454 INFO L125 PetriNetUnfolderBase]: For 294646/294655 co-relation queries the response was YES. [2024-06-14 13:09:42,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38886 conditions, 4908 events. 3169/4908 cut-off events. For 294646/294655 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27422 event pairs, 542 based on Foata normal form. 10/4913 useless extension candidates. Maximal degree in co-relation 38724. Up to 4339 conditions per place. [2024-06-14 13:09:42,516 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 136 changer transitions 0/567 dead transitions. [2024-06-14 13:09:42,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 567 transitions, 9318 flow [2024-06-14 13:09:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-14 13:09:42,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43015521064301554 [2024-06-14 13:09:42,517 INFO L175 Difference]: Start difference. First operand has 353 places, 499 transitions, 7182 flow. Second operand 11 states and 194 transitions. [2024-06-14 13:09:42,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 567 transitions, 9318 flow [2024-06-14 13:09:43,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 567 transitions, 9156 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:43,448 INFO L231 Difference]: Finished difference. Result has 358 places, 528 transitions, 7846 flow [2024-06-14 13:09:43,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7846, PETRI_PLACES=358, PETRI_TRANSITIONS=528} [2024-06-14 13:09:43,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 13:09:43,449 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 528 transitions, 7846 flow [2024-06-14 13:09:43,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:43,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:43,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:43,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:09:43,449 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:43,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1842566513, now seen corresponding path program 8 times [2024-06-14 13:09:43,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:43,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047372302] [2024-06-14 13:09:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047372302] [2024-06-14 13:09:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047372302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:44,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:44,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856066324] [2024-06-14 13:09:44,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:44,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:44,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:44,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:44,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 528 transitions, 7846 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:44,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:44,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:44,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:45,663 INFO L124 PetriNetUnfolderBase]: 3231/5000 cut-off events. [2024-06-14 13:09:45,664 INFO L125 PetriNetUnfolderBase]: For 308618/308627 co-relation queries the response was YES. [2024-06-14 13:09:45,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40269 conditions, 5000 events. 3231/5000 cut-off events. For 308618/308627 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28002 event pairs, 554 based on Foata normal form. 10/5005 useless extension candidates. Maximal degree in co-relation 40107. Up to 4641 conditions per place. [2024-06-14 13:09:45,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 492 selfloop transitions, 78 changer transitions 0/574 dead transitions. [2024-06-14 13:09:45,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 574 transitions, 9573 flow [2024-06-14 13:09:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:09:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:09:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-14 13:09:45,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 13:09:45,848 INFO L175 Difference]: Start difference. First operand has 358 places, 528 transitions, 7846 flow. Second operand 12 states and 201 transitions. [2024-06-14 13:09:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 574 transitions, 9573 flow [2024-06-14 13:09:46,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 574 transitions, 9227 flow, removed 125 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:46,828 INFO L231 Difference]: Finished difference. Result has 366 places, 539 transitions, 7908 flow [2024-06-14 13:09:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7570, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7908, PETRI_PLACES=366, PETRI_TRANSITIONS=539} [2024-06-14 13:09:46,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-14 13:09:46,828 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 539 transitions, 7908 flow [2024-06-14 13:09:46,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:46,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:46,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:09:46,828 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -809074113, now seen corresponding path program 9 times [2024-06-14 13:09:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90311634] [2024-06-14 13:09:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:47,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:47,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90311634] [2024-06-14 13:09:47,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90311634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:47,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:47,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804549071] [2024-06-14 13:09:47,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:47,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:47,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:47,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:47,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:47,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 539 transitions, 7908 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:47,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:47,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:47,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:48,933 INFO L124 PetriNetUnfolderBase]: 3261/5040 cut-off events. [2024-06-14 13:09:48,933 INFO L125 PetriNetUnfolderBase]: For 314012/314021 co-relation queries the response was YES. [2024-06-14 13:09:48,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 5040 events. 3261/5040 cut-off events. For 314012/314021 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28227 event pairs, 556 based on Foata normal form. 10/5045 useless extension candidates. Maximal degree in co-relation 39981. Up to 4559 conditions per place. [2024-06-14 13:09:49,005 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 140 changer transitions 0/578 dead transitions. [2024-06-14 13:09:49,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 578 transitions, 9468 flow [2024-06-14 13:09:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:09:49,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 13:09:49,008 INFO L175 Difference]: Start difference. First operand has 366 places, 539 transitions, 7908 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:09:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 578 transitions, 9468 flow [2024-06-14 13:09:49,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 578 transitions, 9347 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:49,977 INFO L231 Difference]: Finished difference. Result has 368 places, 547 transitions, 8186 flow [2024-06-14 13:09:49,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8186, PETRI_PLACES=368, PETRI_TRANSITIONS=547} [2024-06-14 13:09:49,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 13:09:49,978 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 547 transitions, 8186 flow [2024-06-14 13:09:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:49,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:49,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:09:49,979 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:49,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash 668105961, now seen corresponding path program 10 times [2024-06-14 13:09:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:49,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871506370] [2024-06-14 13:09:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871506370] [2024-06-14 13:09:50,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871506370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:50,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:50,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050443765] [2024-06-14 13:09:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:50,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:50,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 547 transitions, 8186 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:50,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:50,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:50,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:52,117 INFO L124 PetriNetUnfolderBase]: 3281/5072 cut-off events. [2024-06-14 13:09:52,117 INFO L125 PetriNetUnfolderBase]: For 314763/314772 co-relation queries the response was YES. [2024-06-14 13:09:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40652 conditions, 5072 events. 3281/5072 cut-off events. For 314763/314772 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28436 event pairs, 558 based on Foata normal form. 10/5077 useless extension candidates. Maximal degree in co-relation 40489. Up to 4619 conditions per place. [2024-06-14 13:09:52,191 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 142 changer transitions 0/573 dead transitions. [2024-06-14 13:09:52,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 573 transitions, 9487 flow [2024-06-14 13:09:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:09:52,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:09:52,192 INFO L175 Difference]: Start difference. First operand has 368 places, 547 transitions, 8186 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:09:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 573 transitions, 9487 flow [2024-06-14 13:09:53,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 573 transitions, 9080 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:53,224 INFO L231 Difference]: Finished difference. Result has 369 places, 550 transitions, 8128 flow [2024-06-14 13:09:53,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=369, PETRI_TRANSITIONS=550} [2024-06-14 13:09:53,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:09:53,224 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 550 transitions, 8128 flow [2024-06-14 13:09:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:53,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:53,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:09:53,225 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:53,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:53,225 INFO L85 PathProgramCache]: Analyzing trace with hash 885678981, now seen corresponding path program 11 times [2024-06-14 13:09:53,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:53,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208344749] [2024-06-14 13:09:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:53,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208344749] [2024-06-14 13:09:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208344749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:53,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597153474] [2024-06-14 13:09:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:54,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:54,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 550 transitions, 8128 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:54,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:54,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:54,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:55,235 INFO L124 PetriNetUnfolderBase]: 3325/5135 cut-off events. [2024-06-14 13:09:55,235 INFO L125 PetriNetUnfolderBase]: For 329790/329799 co-relation queries the response was YES. [2024-06-14 13:09:55,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41235 conditions, 5135 events. 3325/5135 cut-off events. For 329790/329799 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28805 event pairs, 525 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 41073. Up to 4109 conditions per place. [2024-06-14 13:09:55,310 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 372 selfloop transitions, 209 changer transitions 0/585 dead transitions. [2024-06-14 13:09:55,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 585 transitions, 9772 flow [2024-06-14 13:09:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:09:55,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:09:55,311 INFO L175 Difference]: Start difference. First operand has 369 places, 550 transitions, 8128 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:09:55,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 585 transitions, 9772 flow [2024-06-14 13:09:56,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 585 transitions, 9440 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:56,479 INFO L231 Difference]: Finished difference. Result has 371 places, 556 transitions, 8370 flow [2024-06-14 13:09:56,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7796, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8370, PETRI_PLACES=371, PETRI_TRANSITIONS=556} [2024-06-14 13:09:56,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:09:56,480 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 556 transitions, 8370 flow [2024-06-14 13:09:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:56,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:56,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:09:56,480 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash -213927355, now seen corresponding path program 12 times [2024-06-14 13:09:56,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:56,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198359111] [2024-06-14 13:09:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:57,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:57,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198359111] [2024-06-14 13:09:57,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198359111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:57,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:57,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:57,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505529358] [2024-06-14 13:09:57,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:57,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:09:57,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 556 transitions, 8370 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:57,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:57,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:09:57,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:58,721 INFO L124 PetriNetUnfolderBase]: 3313/5135 cut-off events. [2024-06-14 13:09:58,722 INFO L125 PetriNetUnfolderBase]: For 332788/332797 co-relation queries the response was YES. [2024-06-14 13:09:58,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41627 conditions, 5135 events. 3313/5135 cut-off events. For 332788/332797 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28944 event pairs, 572 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 41464. Up to 4764 conditions per place. [2024-06-14 13:09:58,787 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 507 selfloop transitions, 78 changer transitions 0/589 dead transitions. [2024-06-14 13:09:58,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 589 transitions, 9768 flow [2024-06-14 13:09:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 13:09:58,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:09:58,788 INFO L175 Difference]: Start difference. First operand has 371 places, 556 transitions, 8370 flow. Second operand 11 states and 187 transitions. [2024-06-14 13:09:58,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 589 transitions, 9768 flow [2024-06-14 13:09:59,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 589 transitions, 9511 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:59,813 INFO L231 Difference]: Finished difference. Result has 377 places, 556 transitions, 8276 flow [2024-06-14 13:09:59,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8276, PETRI_PLACES=377, PETRI_TRANSITIONS=556} [2024-06-14 13:09:59,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:09:59,813 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 556 transitions, 8276 flow [2024-06-14 13:09:59,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:59,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:59,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:59,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:09:59,814 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:59,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 170100335, now seen corresponding path program 13 times [2024-06-14 13:09:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:59,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988595216] [2024-06-14 13:09:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:00,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:00,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988595216] [2024-06-14 13:10:00,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988595216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:00,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:00,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:00,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446848952] [2024-06-14 13:10:00,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:00,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 556 transitions, 8276 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:00,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:02,117 INFO L124 PetriNetUnfolderBase]: 3493/5387 cut-off events. [2024-06-14 13:10:02,117 INFO L125 PetriNetUnfolderBase]: For 389363/389372 co-relation queries the response was YES. [2024-06-14 13:10:02,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44941 conditions, 5387 events. 3493/5387 cut-off events. For 389363/389372 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30512 event pairs, 551 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 44776. Up to 4656 conditions per place. [2024-06-14 13:10:02,189 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 450 selfloop transitions, 152 changer transitions 0/606 dead transitions. [2024-06-14 13:10:02,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 606 transitions, 10363 flow [2024-06-14 13:10:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 13:10:02,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-14 13:10:02,190 INFO L175 Difference]: Start difference. First operand has 377 places, 556 transitions, 8276 flow. Second operand 11 states and 192 transitions. [2024-06-14 13:10:02,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 606 transitions, 10363 flow [2024-06-14 13:10:03,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 606 transitions, 10207 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:03,380 INFO L231 Difference]: Finished difference. Result has 379 places, 574 transitions, 8840 flow [2024-06-14 13:10:03,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8840, PETRI_PLACES=379, PETRI_TRANSITIONS=574} [2024-06-14 13:10:03,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-14 13:10:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 574 transitions, 8840 flow [2024-06-14 13:10:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:03,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:03,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:10:03,381 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:03,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash -47294125, now seen corresponding path program 14 times [2024-06-14 13:10:03,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:03,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184520811] [2024-06-14 13:10:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:03,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:04,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184520811] [2024-06-14 13:10:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184520811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:04,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501469463] [2024-06-14 13:10:04,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:04,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:04,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:04,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:04,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 574 transitions, 8840 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:05,679 INFO L124 PetriNetUnfolderBase]: 3481/5375 cut-off events. [2024-06-14 13:10:05,680 INFO L125 PetriNetUnfolderBase]: For 390945/390954 co-relation queries the response was YES. [2024-06-14 13:10:05,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 5375 events. 3481/5375 cut-off events. For 390945/390954 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30474 event pairs, 535 based on Foata normal form. 10/5380 useless extension candidates. Maximal degree in co-relation 45026. Up to 4648 conditions per place. [2024-06-14 13:10:05,762 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 451 selfloop transitions, 154 changer transitions 0/609 dead transitions. [2024-06-14 13:10:05,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 609 transitions, 10605 flow [2024-06-14 13:10:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:10:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:10:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:10:05,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 13:10:05,762 INFO L175 Difference]: Start difference. First operand has 379 places, 574 transitions, 8840 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:10:05,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 609 transitions, 10605 flow [2024-06-14 13:10:07,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 609 transitions, 10386 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:07,033 INFO L231 Difference]: Finished difference. Result has 385 places, 574 transitions, 8935 flow [2024-06-14 13:10:07,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8621, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8935, PETRI_PLACES=385, PETRI_TRANSITIONS=574} [2024-06-14 13:10:07,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 13:10:07,034 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 574 transitions, 8935 flow [2024-06-14 13:10:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:07,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:07,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:10:07,035 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:07,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash -60186715, now seen corresponding path program 15 times [2024-06-14 13:10:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190714589] [2024-06-14 13:10:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:07,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190714589] [2024-06-14 13:10:07,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190714589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:07,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:07,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:07,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840275269] [2024-06-14 13:10:07,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:07,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:07,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:07,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:07,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:07,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 574 transitions, 8935 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:07,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:07,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:07,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:09,489 INFO L124 PetriNetUnfolderBase]: 3469/5365 cut-off events. [2024-06-14 13:10:09,489 INFO L125 PetriNetUnfolderBase]: For 389244/389253 co-relation queries the response was YES. [2024-06-14 13:10:09,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45228 conditions, 5365 events. 3469/5365 cut-off events. For 389244/389253 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30502 event pairs, 608 based on Foata normal form. 10/5370 useless extension candidates. Maximal degree in co-relation 45059. Up to 4955 conditions per place. [2024-06-14 13:10:09,567 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 508 selfloop transitions, 95 changer transitions 0/607 dead transitions. [2024-06-14 13:10:09,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 607 transitions, 10627 flow [2024-06-14 13:10:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:10:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:10:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-14 13:10:09,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40150093808630394 [2024-06-14 13:10:09,568 INFO L175 Difference]: Start difference. First operand has 385 places, 574 transitions, 8935 flow. Second operand 13 states and 214 transitions. [2024-06-14 13:10:09,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 607 transitions, 10627 flow [2024-06-14 13:10:11,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 607 transitions, 10303 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:11,029 INFO L231 Difference]: Finished difference. Result has 390 places, 574 transitions, 8808 flow [2024-06-14 13:10:11,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8611, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8808, PETRI_PLACES=390, PETRI_TRANSITIONS=574} [2024-06-14 13:10:11,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:10:11,030 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 574 transitions, 8808 flow [2024-06-14 13:10:11,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:11,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:11,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:11,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:10:11,030 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:11,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash -52419355, now seen corresponding path program 16 times [2024-06-14 13:10:11,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:11,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911778617] [2024-06-14 13:10:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:11,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:11,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:11,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911778617] [2024-06-14 13:10:11,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911778617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:11,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:11,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:11,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270094974] [2024-06-14 13:10:11,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:11,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:11,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:11,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:11,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:12,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:12,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 574 transitions, 8808 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:12,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:12,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:13,361 INFO L124 PetriNetUnfolderBase]: 3457/5339 cut-off events. [2024-06-14 13:10:13,361 INFO L125 PetriNetUnfolderBase]: For 386393/386402 co-relation queries the response was YES. [2024-06-14 13:10:13,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44508 conditions, 5339 events. 3457/5339 cut-off events. For 386393/386402 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30281 event pairs, 535 based on Foata normal form. 10/5344 useless extension candidates. Maximal degree in co-relation 44338. Up to 4632 conditions per place. [2024-06-14 13:10:13,441 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 455 selfloop transitions, 145 changer transitions 0/604 dead transitions. [2024-06-14 13:10:13,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 604 transitions, 10533 flow [2024-06-14 13:10:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:10:13,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:10:13,442 INFO L175 Difference]: Start difference. First operand has 390 places, 574 transitions, 8808 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:10:13,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 604 transitions, 10533 flow [2024-06-14 13:10:14,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 604 transitions, 10186 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-14 13:10:14,798 INFO L231 Difference]: Finished difference. Result has 388 places, 574 transitions, 8757 flow [2024-06-14 13:10:14,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8757, PETRI_PLACES=388, PETRI_TRANSITIONS=574} [2024-06-14 13:10:14,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-14 13:10:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 574 transitions, 8757 flow [2024-06-14 13:10:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:14,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:14,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:14,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:10:14,800 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:14,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 156976175, now seen corresponding path program 17 times [2024-06-14 13:10:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:14,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798381744] [2024-06-14 13:10:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:15,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798381744] [2024-06-14 13:10:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798381744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:15,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171353284] [2024-06-14 13:10:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 574 transitions, 8757 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:15,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:17,109 INFO L124 PetriNetUnfolderBase]: 3445/5329 cut-off events. [2024-06-14 13:10:17,109 INFO L125 PetriNetUnfolderBase]: For 385325/385334 co-relation queries the response was YES. [2024-06-14 13:10:17,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44108 conditions, 5329 events. 3445/5329 cut-off events. For 385325/385334 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30273 event pairs, 606 based on Foata normal form. 10/5334 useless extension candidates. Maximal degree in co-relation 43939. Up to 4931 conditions per place. [2024-06-14 13:10:17,184 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 502 selfloop transitions, 95 changer transitions 0/601 dead transitions. [2024-06-14 13:10:17,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 601 transitions, 10252 flow [2024-06-14 13:10:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-14 13:10:17,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-14 13:10:17,187 INFO L175 Difference]: Start difference. First operand has 388 places, 574 transitions, 8757 flow. Second operand 11 states and 184 transitions. [2024-06-14 13:10:17,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 601 transitions, 10252 flow [2024-06-14 13:10:18,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 601 transitions, 9888 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:18,583 INFO L231 Difference]: Finished difference. Result has 390 places, 574 transitions, 8589 flow [2024-06-14 13:10:18,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8589, PETRI_PLACES=390, PETRI_TRANSITIONS=574} [2024-06-14 13:10:18,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:10:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 574 transitions, 8589 flow [2024-06-14 13:10:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:18,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:18,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:10:18,584 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:18,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -52835065, now seen corresponding path program 18 times [2024-06-14 13:10:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:18,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181369396] [2024-06-14 13:10:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181369396] [2024-06-14 13:10:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181369396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:19,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:19,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:19,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416357092] [2024-06-14 13:10:19,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:19,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:19,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:19,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 574 transitions, 8589 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:19,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:19,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:19,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:20,871 INFO L124 PetriNetUnfolderBase]: 3433/5305 cut-off events. [2024-06-14 13:10:20,871 INFO L125 PetriNetUnfolderBase]: For 381138/381147 co-relation queries the response was YES. [2024-06-14 13:10:20,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43408 conditions, 5305 events. 3433/5305 cut-off events. For 381138/381147 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30080 event pairs, 596 based on Foata normal form. 10/5310 useless extension candidates. Maximal degree in co-relation 43238. Up to 4975 conditions per place. [2024-06-14 13:10:20,944 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 85 changer transitions 0/595 dead transitions. [2024-06-14 13:10:20,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 595 transitions, 9879 flow [2024-06-14 13:10:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:10:20,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:10:20,945 INFO L175 Difference]: Start difference. First operand has 390 places, 574 transitions, 8589 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:10:20,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 595 transitions, 9879 flow [2024-06-14 13:10:22,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 595 transitions, 9655 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:22,401 INFO L231 Difference]: Finished difference. Result has 389 places, 574 transitions, 8542 flow [2024-06-14 13:10:22,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8365, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8542, PETRI_PLACES=389, PETRI_TRANSITIONS=574} [2024-06-14 13:10:22,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:10:22,401 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 574 transitions, 8542 flow [2024-06-14 13:10:22,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:22,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:22,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:22,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:10:22,402 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:22,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 261577271, now seen corresponding path program 19 times [2024-06-14 13:10:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:22,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701516560] [2024-06-14 13:10:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701516560] [2024-06-14 13:10:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701516560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:23,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843856795] [2024-06-14 13:10:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:23,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:23,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:23,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:23,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:23,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:23,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 574 transitions, 8542 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:23,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:23,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:23,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:24,641 INFO L124 PetriNetUnfolderBase]: 3453/5343 cut-off events. [2024-06-14 13:10:24,641 INFO L125 PetriNetUnfolderBase]: For 390155/390164 co-relation queries the response was YES. [2024-06-14 13:10:24,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43648 conditions, 5343 events. 3453/5343 cut-off events. For 390155/390164 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30390 event pairs, 604 based on Foata normal form. 10/5348 useless extension candidates. Maximal degree in co-relation 43477. Up to 4887 conditions per place. [2024-06-14 13:10:24,717 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 90 changer transitions 0/616 dead transitions. [2024-06-14 13:10:24,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 616 transitions, 10368 flow [2024-06-14 13:10:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:10:24,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:10:24,718 INFO L175 Difference]: Start difference. First operand has 389 places, 574 transitions, 8542 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:10:24,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 616 transitions, 10368 flow [2024-06-14 13:10:25,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 616 transitions, 10169 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:26,099 INFO L231 Difference]: Finished difference. Result has 390 places, 577 transitions, 8584 flow [2024-06-14 13:10:26,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8584, PETRI_PLACES=390, PETRI_TRANSITIONS=577} [2024-06-14 13:10:26,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:10:26,100 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 577 transitions, 8584 flow [2024-06-14 13:10:26,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:26,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:26,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:26,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:10:26,100 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:26,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:26,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2009064211, now seen corresponding path program 20 times [2024-06-14 13:10:26,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:26,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076095546] [2024-06-14 13:10:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076095546] [2024-06-14 13:10:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076095546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:26,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:26,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:26,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644711605] [2024-06-14 13:10:26,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:26,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:26,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:26,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:26,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:26,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:26,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 577 transitions, 8584 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:26,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:26,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:26,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:28,317 INFO L124 PetriNetUnfolderBase]: 3441/5329 cut-off events. [2024-06-14 13:10:28,317 INFO L125 PetriNetUnfolderBase]: For 387637/387646 co-relation queries the response was YES. [2024-06-14 13:10:28,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 5329 events. 3441/5329 cut-off events. For 387637/387646 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30334 event pairs, 596 based on Foata normal form. 10/5334 useless extension candidates. Maximal degree in co-relation 43253. Up to 4879 conditions per place. [2024-06-14 13:10:28,394 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 516 selfloop transitions, 86 changer transitions 0/606 dead transitions. [2024-06-14 13:10:28,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 606 transitions, 10120 flow [2024-06-14 13:10:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:10:28,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:10:28,395 INFO L175 Difference]: Start difference. First operand has 390 places, 577 transitions, 8584 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:10:28,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 606 transitions, 10120 flow [2024-06-14 13:10:29,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 606 transitions, 9780 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:29,854 INFO L231 Difference]: Finished difference. Result has 390 places, 577 transitions, 8422 flow [2024-06-14 13:10:29,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8422, PETRI_PLACES=390, PETRI_TRANSITIONS=577} [2024-06-14 13:10:29,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:10:29,855 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 577 transitions, 8422 flow [2024-06-14 13:10:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:29,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:29,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:29,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:10:29,855 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:29,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2016410281, now seen corresponding path program 21 times [2024-06-14 13:10:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:29,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031647833] [2024-06-14 13:10:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:29,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:30,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031647833] [2024-06-14 13:10:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031647833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:30,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:30,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068022476] [2024-06-14 13:10:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:30,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 577 transitions, 8422 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:30,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:32,060 INFO L124 PetriNetUnfolderBase]: 3429/5307 cut-off events. [2024-06-14 13:10:32,060 INFO L125 PetriNetUnfolderBase]: For 382686/382695 co-relation queries the response was YES. [2024-06-14 13:10:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42786 conditions, 5307 events. 3429/5307 cut-off events. For 382686/382695 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30139 event pairs, 600 based on Foata normal form. 10/5312 useless extension candidates. Maximal degree in co-relation 42614. Up to 4923 conditions per place. [2024-06-14 13:10:32,138 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 86 changer transitions 0/604 dead transitions. [2024-06-14 13:10:32,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 604 transitions, 9759 flow [2024-06-14 13:10:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:10:32,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:10:32,139 INFO L175 Difference]: Start difference. First operand has 390 places, 577 transitions, 8422 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:10:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 604 transitions, 9759 flow [2024-06-14 13:10:33,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 604 transitions, 9587 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:33,833 INFO L231 Difference]: Finished difference. Result has 392 places, 577 transitions, 8429 flow [2024-06-14 13:10:33,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8429, PETRI_PLACES=392, PETRI_TRANSITIONS=577} [2024-06-14 13:10:33,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-14 13:10:33,833 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 577 transitions, 8429 flow [2024-06-14 13:10:33,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:33,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:33,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:10:33,834 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:33,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash 320087886, now seen corresponding path program 2 times [2024-06-14 13:10:33,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:33,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320258482] [2024-06-14 13:10:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:33,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:34,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320258482] [2024-06-14 13:10:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320258482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:34,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:34,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:34,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350366727] [2024-06-14 13:10:34,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:34,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:34,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 577 transitions, 8429 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:34,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:34,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:34,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:36,047 INFO L124 PetriNetUnfolderBase]: 3439/5300 cut-off events. [2024-06-14 13:10:36,047 INFO L125 PetriNetUnfolderBase]: For 384786/384795 co-relation queries the response was YES. [2024-06-14 13:10:36,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42977 conditions, 5300 events. 3439/5300 cut-off events. For 384786/384795 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29870 event pairs, 586 based on Foata normal form. 8/5303 useless extension candidates. Maximal degree in co-relation 42804. Up to 5087 conditions per place. [2024-06-14 13:10:36,121 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 553 selfloop transitions, 39 changer transitions 0/596 dead transitions. [2024-06-14 13:10:36,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 596 transitions, 9798 flow [2024-06-14 13:10:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:10:36,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:10:36,122 INFO L175 Difference]: Start difference. First operand has 392 places, 577 transitions, 8429 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:10:36,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 596 transitions, 9798 flow [2024-06-14 13:10:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 596 transitions, 9523 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:37,517 INFO L231 Difference]: Finished difference. Result has 392 places, 583 transitions, 8373 flow [2024-06-14 13:10:37,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8154, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8373, PETRI_PLACES=392, PETRI_TRANSITIONS=583} [2024-06-14 13:10:37,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-14 13:10:37,518 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 583 transitions, 8373 flow [2024-06-14 13:10:37,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:37,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:37,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:37,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:10:37,518 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:37,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1504659951, now seen corresponding path program 22 times [2024-06-14 13:10:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:37,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247988756] [2024-06-14 13:10:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:37,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:38,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247988756] [2024-06-14 13:10:38,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247988756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:38,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:38,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159771079] [2024-06-14 13:10:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:38,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:38,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 583 transitions, 8373 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:38,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:38,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:38,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:39,604 INFO L124 PetriNetUnfolderBase]: 3491/5397 cut-off events. [2024-06-14 13:10:39,604 INFO L125 PetriNetUnfolderBase]: For 416696/416705 co-relation queries the response was YES. [2024-06-14 13:10:39,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 5397 events. 3491/5397 cut-off events. For 416696/416705 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30763 event pairs, 589 based on Foata normal form. 10/5402 useless extension candidates. Maximal degree in co-relation 44273. Up to 4692 conditions per place. [2024-06-14 13:10:39,684 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 128 changer transitions 0/616 dead transitions. [2024-06-14 13:10:39,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 616 transitions, 10272 flow [2024-06-14 13:10:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:10:39,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 13:10:39,685 INFO L175 Difference]: Start difference. First operand has 392 places, 583 transitions, 8373 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:10:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 616 transitions, 10272 flow [2024-06-14 13:10:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 616 transitions, 10121 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:41,376 INFO L231 Difference]: Finished difference. Result has 395 places, 589 transitions, 8636 flow [2024-06-14 13:10:41,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8226, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8636, PETRI_PLACES=395, PETRI_TRANSITIONS=589} [2024-06-14 13:10:41,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 13:10:41,376 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 589 transitions, 8636 flow [2024-06-14 13:10:41,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:41,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:41,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:10:41,376 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:41,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 496952279, now seen corresponding path program 23 times [2024-06-14 13:10:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665066347] [2024-06-14 13:10:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665066347] [2024-06-14 13:10:42,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665066347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:42,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:42,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:42,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123755852] [2024-06-14 13:10:42,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:42,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:42,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:42,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 589 transitions, 8636 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:42,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:42,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:42,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:43,487 INFO L124 PetriNetUnfolderBase]: 3543/5458 cut-off events. [2024-06-14 13:10:43,487 INFO L125 PetriNetUnfolderBase]: For 432505/432514 co-relation queries the response was YES. [2024-06-14 13:10:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45783 conditions, 5458 events. 3543/5458 cut-off events. For 432505/432514 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30961 event pairs, 596 based on Foata normal form. 10/5463 useless extension candidates. Maximal degree in co-relation 45608. Up to 5112 conditions per place. [2024-06-14 13:10:43,577 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 561 selfloop transitions, 50 changer transitions 0/615 dead transitions. [2024-06-14 13:10:43,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 615 transitions, 10487 flow [2024-06-14 13:10:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:10:43,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:10:43,578 INFO L175 Difference]: Start difference. First operand has 395 places, 589 transitions, 8636 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:10:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 615 transitions, 10487 flow [2024-06-14 13:10:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 615 transitions, 10229 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:45,157 INFO L231 Difference]: Finished difference. Result has 399 places, 595 transitions, 8644 flow [2024-06-14 13:10:45,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8644, PETRI_PLACES=399, PETRI_TRANSITIONS=595} [2024-06-14 13:10:45,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-14 13:10:45,158 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 595 transitions, 8644 flow [2024-06-14 13:10:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:45,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:10:45,158 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:45,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:45,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1317149631, now seen corresponding path program 24 times [2024-06-14 13:10:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127169423] [2024-06-14 13:10:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:45,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127169423] [2024-06-14 13:10:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127169423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:45,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622689650] [2024-06-14 13:10:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:45,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:45,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:45,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 595 transitions, 8644 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:45,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:45,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:45,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:47,296 INFO L124 PetriNetUnfolderBase]: 3531/5436 cut-off events. [2024-06-14 13:10:47,297 INFO L125 PetriNetUnfolderBase]: For 427320/427329 co-relation queries the response was YES. [2024-06-14 13:10:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44891 conditions, 5436 events. 3531/5436 cut-off events. For 427320/427329 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30803 event pairs, 604 based on Foata normal form. 10/5441 useless extension candidates. Maximal degree in co-relation 44715. Up to 5212 conditions per place. [2024-06-14 13:10:47,373 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 574 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-14 13:10:47,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 611 transitions, 9969 flow [2024-06-14 13:10:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:10:47,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:10:47,374 INFO L175 Difference]: Start difference. First operand has 399 places, 595 transitions, 8644 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:10:47,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 611 transitions, 9969 flow [2024-06-14 13:10:48,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 611 transitions, 9546 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:48,979 INFO L231 Difference]: Finished difference. Result has 400 places, 595 transitions, 8293 flow [2024-06-14 13:10:48,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8293, PETRI_PLACES=400, PETRI_TRANSITIONS=595} [2024-06-14 13:10:48,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 13:10:48,979 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 595 transitions, 8293 flow [2024-06-14 13:10:48,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:48,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:48,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:48,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:10:48,979 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 292308727, now seen corresponding path program 4 times [2024-06-14 13:10:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769619818] [2024-06-14 13:10:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769619818] [2024-06-14 13:10:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769619818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447096913] [2024-06-14 13:10:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:49,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:49,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:49,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 595 transitions, 8293 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:49,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:49,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:49,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:51,280 INFO L124 PetriNetUnfolderBase]: 3533/5437 cut-off events. [2024-06-14 13:10:51,280 INFO L125 PetriNetUnfolderBase]: For 422538/422540 co-relation queries the response was YES. [2024-06-14 13:10:51,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44092 conditions, 5437 events. 3533/5437 cut-off events. For 422538/422540 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30710 event pairs, 620 based on Foata normal form. 2/5430 useless extension candidates. Maximal degree in co-relation 43916. Up to 5179 conditions per place. [2024-06-14 13:10:51,347 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 46 changer transitions 0/612 dead transitions. [2024-06-14 13:10:51,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 612 transitions, 9653 flow [2024-06-14 13:10:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:10:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 13:10:51,348 INFO L175 Difference]: Start difference. First operand has 400 places, 595 transitions, 8293 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:10:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 612 transitions, 9653 flow [2024-06-14 13:10:53,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 612 transitions, 9547 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:53,060 INFO L231 Difference]: Finished difference. Result has 402 places, 601 transitions, 8409 flow [2024-06-14 13:10:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8409, PETRI_PLACES=402, PETRI_TRANSITIONS=601} [2024-06-14 13:10:53,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-14 13:10:53,061 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 601 transitions, 8409 flow [2024-06-14 13:10:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:10:53,061 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:53,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 274707011, now seen corresponding path program 25 times [2024-06-14 13:10:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249685658] [2024-06-14 13:10:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:53,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:53,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249685658] [2024-06-14 13:10:53,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249685658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:53,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:53,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:53,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466144233] [2024-06-14 13:10:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:53,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:53,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:53,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 601 transitions, 8409 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:53,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:53,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:53,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:55,230 INFO L124 PetriNetUnfolderBase]: 3553/5486 cut-off events. [2024-06-14 13:10:55,230 INFO L125 PetriNetUnfolderBase]: For 441464/441473 co-relation queries the response was YES. [2024-06-14 13:10:55,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44942 conditions, 5486 events. 3553/5486 cut-off events. For 441464/441473 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 31274 event pairs, 597 based on Foata normal form. 10/5491 useless extension candidates. Maximal degree in co-relation 44764. Up to 4743 conditions per place. [2024-06-14 13:10:55,320 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 489 selfloop transitions, 138 changer transitions 0/631 dead transitions. [2024-06-14 13:10:55,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 631 transitions, 10261 flow [2024-06-14 13:10:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:10:55,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 13:10:55,321 INFO L175 Difference]: Start difference. First operand has 402 places, 601 transitions, 8409 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:10:55,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 631 transitions, 10261 flow [2024-06-14 13:10:57,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 631 transitions, 10087 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:57,150 INFO L231 Difference]: Finished difference. Result has 405 places, 604 transitions, 8568 flow [2024-06-14 13:10:57,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=405, PETRI_TRANSITIONS=604} [2024-06-14 13:10:57,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-14 13:10:57,151 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 604 transitions, 8568 flow [2024-06-14 13:10:57,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:57,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:57,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:10:57,151 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1310483391, now seen corresponding path program 26 times [2024-06-14 13:10:57,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:57,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324286251] [2024-06-14 13:10:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:57,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:57,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:57,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324286251] [2024-06-14 13:10:57,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324286251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:57,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:57,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207708314] [2024-06-14 13:10:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:10:57,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 604 transitions, 8568 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:57,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:57,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:10:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:59,248 INFO L124 PetriNetUnfolderBase]: 3541/5457 cut-off events. [2024-06-14 13:10:59,248 INFO L125 PetriNetUnfolderBase]: For 437499/437508 co-relation queries the response was YES. [2024-06-14 13:10:59,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44858 conditions, 5457 events. 3541/5457 cut-off events. For 437499/437508 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31003 event pairs, 582 based on Foata normal form. 10/5462 useless extension candidates. Maximal degree in co-relation 44679. Up to 5127 conditions per place. [2024-06-14 13:10:59,332 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 566 selfloop transitions, 52 changer transitions 0/622 dead transitions. [2024-06-14 13:10:59,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 622 transitions, 9955 flow [2024-06-14 13:10:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:10:59,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:10:59,333 INFO L175 Difference]: Start difference. First operand has 405 places, 604 transitions, 8568 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:10:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 622 transitions, 9955 flow [2024-06-14 13:11:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 622 transitions, 9658 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:01,018 INFO L231 Difference]: Finished difference. Result has 408 places, 604 transitions, 8381 flow [2024-06-14 13:11:01,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8381, PETRI_PLACES=408, PETRI_TRANSITIONS=604} [2024-06-14 13:11:01,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:11:01,018 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 604 transitions, 8381 flow [2024-06-14 13:11:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:01,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:01,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:01,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:11:01,019 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:01,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash 753898476, now seen corresponding path program 3 times [2024-06-14 13:11:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:01,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74902815] [2024-06-14 13:11:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:01,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:01,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:01,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74902815] [2024-06-14 13:11:01,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74902815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:01,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:01,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:01,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243199949] [2024-06-14 13:11:01,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:01,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:01,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:01,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 604 transitions, 8381 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:01,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:01,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:03,162 INFO L124 PetriNetUnfolderBase]: 3543/5468 cut-off events. [2024-06-14 13:11:03,162 INFO L125 PetriNetUnfolderBase]: For 435175/435184 co-relation queries the response was YES. [2024-06-14 13:11:03,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44517 conditions, 5468 events. 3543/5468 cut-off events. For 435175/435184 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31159 event pairs, 590 based on Foata normal form. 8/5471 useless extension candidates. Maximal degree in co-relation 44337. Up to 5182 conditions per place. [2024-06-14 13:11:03,242 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 563 selfloop transitions, 55 changer transitions 0/622 dead transitions. [2024-06-14 13:11:03,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 622 transitions, 9820 flow [2024-06-14 13:11:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:11:03,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 13:11:03,243 INFO L175 Difference]: Start difference. First operand has 408 places, 604 transitions, 8381 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:11:03,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 622 transitions, 9820 flow [2024-06-14 13:11:05,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 622 transitions, 9706 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:05,055 INFO L231 Difference]: Finished difference. Result has 408 places, 607 transitions, 8483 flow [2024-06-14 13:11:05,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8483, PETRI_PLACES=408, PETRI_TRANSITIONS=607} [2024-06-14 13:11:05,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:11:05,056 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 607 transitions, 8483 flow [2024-06-14 13:11:05,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:05,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:05,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:05,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:11:05,056 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:05,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash 269344631, now seen corresponding path program 27 times [2024-06-14 13:11:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565386432] [2024-06-14 13:11:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:05,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:05,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:05,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565386432] [2024-06-14 13:11:05,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565386432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:05,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:05,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:05,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907640421] [2024-06-14 13:11:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:05,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:05,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:05,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:05,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 607 transitions, 8483 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:05,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:05,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:07,370 INFO L124 PetriNetUnfolderBase]: 3531/5453 cut-off events. [2024-06-14 13:11:07,370 INFO L125 PetriNetUnfolderBase]: For 438069/438078 co-relation queries the response was YES. [2024-06-14 13:11:07,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44396 conditions, 5453 events. 3531/5453 cut-off events. For 438069/438078 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31046 event pairs, 551 based on Foata normal form. 10/5458 useless extension candidates. Maximal degree in co-relation 44215. Up to 4730 conditions per place. [2024-06-14 13:11:07,444 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 484 selfloop transitions, 147 changer transitions 0/635 dead transitions. [2024-06-14 13:11:07,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 635 transitions, 9966 flow [2024-06-14 13:11:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:11:07,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 13:11:07,445 INFO L175 Difference]: Start difference. First operand has 408 places, 607 transitions, 8483 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:11:07,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 635 transitions, 9966 flow [2024-06-14 13:11:09,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 635 transitions, 9758 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:09,078 INFO L231 Difference]: Finished difference. Result has 410 places, 607 transitions, 8575 flow [2024-06-14 13:11:09,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8275, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8575, PETRI_PLACES=410, PETRI_TRANSITIONS=607} [2024-06-14 13:11:09,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-14 13:11:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 607 transitions, 8575 flow [2024-06-14 13:11:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:09,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:09,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:11:09,078 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 579816969, now seen corresponding path program 1 times [2024-06-14 13:11:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:09,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799127485] [2024-06-14 13:11:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799127485] [2024-06-14 13:11:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799127485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:10,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:10,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:10,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875081617] [2024-06-14 13:11:10,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:10,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:10,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:10,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:10,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 607 transitions, 8575 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:10,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:10,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:10,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:11,618 INFO L124 PetriNetUnfolderBase]: 3618/5577 cut-off events. [2024-06-14 13:11:11,619 INFO L125 PetriNetUnfolderBase]: For 490383/490385 co-relation queries the response was YES. [2024-06-14 13:11:11,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46336 conditions, 5577 events. 3618/5577 cut-off events. For 490383/490385 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31705 event pairs, 644 based on Foata normal form. 8/5583 useless extension candidates. Maximal degree in co-relation 46155. Up to 5013 conditions per place. [2024-06-14 13:11:11,702 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 564 selfloop transitions, 87 changer transitions 0/655 dead transitions. [2024-06-14 13:11:11,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 655 transitions, 10376 flow [2024-06-14 13:11:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 13:11:11,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-14 13:11:11,703 INFO L175 Difference]: Start difference. First operand has 410 places, 607 transitions, 8575 flow. Second operand 10 states and 183 transitions. [2024-06-14 13:11:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 655 transitions, 10376 flow [2024-06-14 13:11:13,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 655 transitions, 9821 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:13,093 INFO L231 Difference]: Finished difference. Result has 414 places, 612 transitions, 8307 flow [2024-06-14 13:11:13,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8307, PETRI_PLACES=414, PETRI_TRANSITIONS=612} [2024-06-14 13:11:13,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-14 13:11:13,094 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 612 transitions, 8307 flow [2024-06-14 13:11:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:11:13,094 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 581694639, now seen corresponding path program 2 times [2024-06-14 13:11:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791424593] [2024-06-14 13:11:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:14,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791424593] [2024-06-14 13:11:14,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791424593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:14,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608253469] [2024-06-14 13:11:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:14,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:14,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:14,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 612 transitions, 8307 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:14,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:14,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:14,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:15,525 INFO L124 PetriNetUnfolderBase]: 3654/5633 cut-off events. [2024-06-14 13:11:15,525 INFO L125 PetriNetUnfolderBase]: For 507173/507175 co-relation queries the response was YES. [2024-06-14 13:11:15,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46191 conditions, 5633 events. 3654/5633 cut-off events. For 507173/507175 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32076 event pairs, 664 based on Foata normal form. 10/5641 useless extension candidates. Maximal degree in co-relation 46008. Up to 5244 conditions per place. [2024-06-14 13:11:15,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 544 selfloop transitions, 96 changer transitions 0/644 dead transitions. [2024-06-14 13:11:15,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 644 transitions, 9950 flow [2024-06-14 13:11:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 13:11:15,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-14 13:11:15,613 INFO L175 Difference]: Start difference. First operand has 414 places, 612 transitions, 8307 flow. Second operand 10 states and 177 transitions. [2024-06-14 13:11:15,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 644 transitions, 9950 flow [2024-06-14 13:11:17,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 644 transitions, 9824 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:17,431 INFO L231 Difference]: Finished difference. Result has 419 places, 613 transitions, 8401 flow [2024-06-14 13:11:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8401, PETRI_PLACES=419, PETRI_TRANSITIONS=613} [2024-06-14 13:11:17,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 13:11:17,432 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 613 transitions, 8401 flow [2024-06-14 13:11:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:17,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:17,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:17,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:11:17,432 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:17,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 581690919, now seen corresponding path program 3 times [2024-06-14 13:11:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623673276] [2024-06-14 13:11:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623673276] [2024-06-14 13:11:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623673276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:18,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:18,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:18,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687551224] [2024-06-14 13:11:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:18,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:18,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 613 transitions, 8401 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:18,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:18,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:18,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:19,897 INFO L124 PetriNetUnfolderBase]: 3682/5677 cut-off events. [2024-06-14 13:11:19,897 INFO L125 PetriNetUnfolderBase]: For 511881/511883 co-relation queries the response was YES. [2024-06-14 13:11:19,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46873 conditions, 5677 events. 3682/5677 cut-off events. For 511881/511883 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32414 event pairs, 662 based on Foata normal form. 8/5683 useless extension candidates. Maximal degree in co-relation 46688. Up to 5250 conditions per place. [2024-06-14 13:11:19,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 549 selfloop transitions, 98 changer transitions 0/651 dead transitions. [2024-06-14 13:11:19,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 651 transitions, 10137 flow [2024-06-14 13:11:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 13:11:19,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 13:11:19,990 INFO L175 Difference]: Start difference. First operand has 419 places, 613 transitions, 8401 flow. Second operand 10 states and 181 transitions. [2024-06-14 13:11:19,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 651 transitions, 10137 flow [2024-06-14 13:11:21,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 651 transitions, 9940 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:21,496 INFO L231 Difference]: Finished difference. Result has 422 places, 616 transitions, 8466 flow [2024-06-14 13:11:21,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8466, PETRI_PLACES=422, PETRI_TRANSITIONS=616} [2024-06-14 13:11:21,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-14 13:11:21,497 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 616 transitions, 8466 flow [2024-06-14 13:11:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:21,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:21,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:21,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:11:21,497 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:21,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash 668386449, now seen corresponding path program 4 times [2024-06-14 13:11:21,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909940425] [2024-06-14 13:11:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:22,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:22,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909940425] [2024-06-14 13:11:22,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909940425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:22,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:22,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195886546] [2024-06-14 13:11:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:22,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:22,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 616 transitions, 8466 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:22,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:22,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:22,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:24,093 INFO L124 PetriNetUnfolderBase]: 3726/5745 cut-off events. [2024-06-14 13:11:24,093 INFO L125 PetriNetUnfolderBase]: For 539092/539094 co-relation queries the response was YES. [2024-06-14 13:11:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47592 conditions, 5745 events. 3726/5745 cut-off events. For 539092/539094 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 32842 event pairs, 680 based on Foata normal form. 12/5755 useless extension candidates. Maximal degree in co-relation 47405. Up to 5431 conditions per place. [2024-06-14 13:11:24,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 58 changer transitions 0/646 dead transitions. [2024-06-14 13:11:24,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 646 transitions, 9951 flow [2024-06-14 13:11:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-14 13:11:24,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-14 13:11:24,186 INFO L175 Difference]: Start difference. First operand has 422 places, 616 transitions, 8466 flow. Second operand 11 states and 184 transitions. [2024-06-14 13:11:24,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 646 transitions, 9951 flow [2024-06-14 13:11:25,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 646 transitions, 9815 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:25,955 INFO L231 Difference]: Finished difference. Result has 427 places, 617 transitions, 8479 flow [2024-06-14 13:11:25,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8479, PETRI_PLACES=427, PETRI_TRANSITIONS=617} [2024-06-14 13:11:25,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-14 13:11:25,956 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 617 transitions, 8479 flow [2024-06-14 13:11:25,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:25,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:25,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:25,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:11:25,956 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:25,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 668382729, now seen corresponding path program 5 times [2024-06-14 13:11:25,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:25,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422810820] [2024-06-14 13:11:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:26,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422810820] [2024-06-14 13:11:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422810820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:26,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:26,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488887810] [2024-06-14 13:11:26,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:26,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:27,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:27,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 617 transitions, 8479 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:27,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:27,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:27,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:28,521 INFO L124 PetriNetUnfolderBase]: 3754/5789 cut-off events. [2024-06-14 13:11:28,521 INFO L125 PetriNetUnfolderBase]: For 535704/535706 co-relation queries the response was YES. [2024-06-14 13:11:28,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48187 conditions, 5789 events. 3754/5789 cut-off events. For 535704/535706 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33172 event pairs, 674 based on Foata normal form. 8/5795 useless extension candidates. Maximal degree in co-relation 47998. Up to 5437 conditions per place. [2024-06-14 13:11:28,615 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 589 selfloop transitions, 59 changer transitions 0/652 dead transitions. [2024-06-14 13:11:28,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 10055 flow [2024-06-14 13:11:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:11:28,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 13:11:28,616 INFO L175 Difference]: Start difference. First operand has 427 places, 617 transitions, 8479 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:11:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 10055 flow [2024-06-14 13:11:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 652 transitions, 9931 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:11:30,654 INFO L231 Difference]: Finished difference. Result has 429 places, 620 transitions, 8548 flow [2024-06-14 13:11:30,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8355, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8548, PETRI_PLACES=429, PETRI_TRANSITIONS=620} [2024-06-14 13:11:30,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 13:11:30,655 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 620 transitions, 8548 flow [2024-06-14 13:11:30,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:30,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:11:30,655 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:30,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash -46840285, now seen corresponding path program 1 times [2024-06-14 13:11:30,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:30,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934097043] [2024-06-14 13:11:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:30,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:31,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:31,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934097043] [2024-06-14 13:11:31,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934097043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:31,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:31,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192915684] [2024-06-14 13:11:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:31,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:31,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:31,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 620 transitions, 8548 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:31,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:31,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:31,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:33,443 INFO L124 PetriNetUnfolderBase]: 3762/5801 cut-off events. [2024-06-14 13:11:33,444 INFO L125 PetriNetUnfolderBase]: For 522676/522678 co-relation queries the response was YES. [2024-06-14 13:11:33,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48402 conditions, 5801 events. 3762/5801 cut-off events. For 522676/522678 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 33305 event pairs, 698 based on Foata normal form. 2/5801 useless extension candidates. Maximal degree in co-relation 48211. Up to 5589 conditions per place. [2024-06-14 13:11:33,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 602 selfloop transitions, 37 changer transitions 0/643 dead transitions. [2024-06-14 13:11:33,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 643 transitions, 9965 flow [2024-06-14 13:11:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:11:33,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-14 13:11:33,528 INFO L175 Difference]: Start difference. First operand has 429 places, 620 transitions, 8548 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:11:33,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 643 transitions, 9965 flow [2024-06-14 13:11:35,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 643 transitions, 9871 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:35,699 INFO L231 Difference]: Finished difference. Result has 434 places, 622 transitions, 8584 flow [2024-06-14 13:11:35,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8584, PETRI_PLACES=434, PETRI_TRANSITIONS=622} [2024-06-14 13:11:35,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-14 13:11:35,700 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 622 transitions, 8584 flow [2024-06-14 13:11:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:35,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:35,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:35,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:11:35,700 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:35,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -46832845, now seen corresponding path program 2 times [2024-06-14 13:11:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:35,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355073310] [2024-06-14 13:11:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:36,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355073310] [2024-06-14 13:11:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355073310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:36,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721335879] [2024-06-14 13:11:36,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:36,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:36,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 622 transitions, 8584 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:36,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:36,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:36,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:38,563 INFO L124 PetriNetUnfolderBase]: 3783/5832 cut-off events. [2024-06-14 13:11:38,563 INFO L125 PetriNetUnfolderBase]: For 541412/541414 co-relation queries the response was YES. [2024-06-14 13:11:38,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49053 conditions, 5832 events. 3783/5832 cut-off events. For 541412/541414 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33526 event pairs, 703 based on Foata normal form. 2/5832 useless extension candidates. Maximal degree in co-relation 48860. Up to 5597 conditions per place. [2024-06-14 13:11:38,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 601 selfloop transitions, 43 changer transitions 0/648 dead transitions. [2024-06-14 13:11:38,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 648 transitions, 10231 flow [2024-06-14 13:11:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 13:11:38,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:11:38,650 INFO L175 Difference]: Start difference. First operand has 434 places, 622 transitions, 8584 flow. Second operand 11 states and 176 transitions. [2024-06-14 13:11:38,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 648 transitions, 10231 flow [2024-06-14 13:11:41,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 648 transitions, 10120 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:11:41,037 INFO L231 Difference]: Finished difference. Result has 437 places, 626 transitions, 8670 flow [2024-06-14 13:11:41,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8473, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8670, PETRI_PLACES=437, PETRI_TRANSITIONS=626} [2024-06-14 13:11:41,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-14 13:11:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 626 transitions, 8670 flow [2024-06-14 13:11:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:41,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:41,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:11:41,038 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:41,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:41,038 INFO L85 PathProgramCache]: Analyzing trace with hash -52404475, now seen corresponding path program 3 times [2024-06-14 13:11:41,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:41,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917811435] [2024-06-14 13:11:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:41,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917811435] [2024-06-14 13:11:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917811435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:41,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94542542] [2024-06-14 13:11:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:41,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:42,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:42,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 626 transitions, 8670 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:42,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:42,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:42,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:43,590 INFO L124 PetriNetUnfolderBase]: 3778/5825 cut-off events. [2024-06-14 13:11:43,590 INFO L125 PetriNetUnfolderBase]: For 543866/543868 co-relation queries the response was YES. [2024-06-14 13:11:43,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49061 conditions, 5825 events. 3778/5825 cut-off events. For 543866/543868 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 33435 event pairs, 706 based on Foata normal form. 2/5825 useless extension candidates. Maximal degree in co-relation 48866. Up to 5613 conditions per place. [2024-06-14 13:11:43,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 605 selfloop transitions, 36 changer transitions 0/645 dead transitions. [2024-06-14 13:11:43,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 645 transitions, 10040 flow [2024-06-14 13:11:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:11:43,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:11:43,669 INFO L175 Difference]: Start difference. First operand has 437 places, 626 transitions, 8670 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:11:43,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 645 transitions, 10040 flow [2024-06-14 13:11:45,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 645 transitions, 9922 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:45,928 INFO L231 Difference]: Finished difference. Result has 439 places, 626 transitions, 8629 flow [2024-06-14 13:11:45,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8629, PETRI_PLACES=439, PETRI_TRANSITIONS=626} [2024-06-14 13:11:45,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 13:11:45,929 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 626 transitions, 8629 flow [2024-06-14 13:11:45,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:45,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:45,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:45,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:11:45,929 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:45,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:45,929 INFO L85 PathProgramCache]: Analyzing trace with hash -52554577, now seen corresponding path program 6 times [2024-06-14 13:11:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:45,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122979274] [2024-06-14 13:11:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:47,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:47,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122979274] [2024-06-14 13:11:47,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122979274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:47,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:47,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:47,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396922827] [2024-06-14 13:11:47,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:47,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:47,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 626 transitions, 8629 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:47,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:47,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:47,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:48,836 INFO L124 PetriNetUnfolderBase]: 3814/5881 cut-off events. [2024-06-14 13:11:48,836 INFO L125 PetriNetUnfolderBase]: For 590778/590780 co-relation queries the response was YES. [2024-06-14 13:11:48,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49648 conditions, 5881 events. 3814/5881 cut-off events. For 590778/590780 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33853 event pairs, 704 based on Foata normal form. 10/5889 useless extension candidates. Maximal degree in co-relation 49451. Up to 5592 conditions per place. [2024-06-14 13:11:48,921 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 602 selfloop transitions, 48 changer transitions 0/654 dead transitions. [2024-06-14 13:11:48,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 654 transitions, 10134 flow [2024-06-14 13:11:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-14 13:11:48,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-14 13:11:48,922 INFO L175 Difference]: Start difference. First operand has 439 places, 626 transitions, 8629 flow. Second operand 11 states and 184 transitions. [2024-06-14 13:11:48,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 654 transitions, 10134 flow [2024-06-14 13:11:51,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 654 transitions, 10050 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:51,923 INFO L231 Difference]: Finished difference. Result has 442 places, 627 transitions, 8685 flow [2024-06-14 13:11:51,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8545, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8685, PETRI_PLACES=442, PETRI_TRANSITIONS=627} [2024-06-14 13:11:51,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-14 13:11:51,924 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 627 transitions, 8685 flow [2024-06-14 13:11:51,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:51,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:51,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:51,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:11:51,924 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:51,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:51,924 INFO L85 PathProgramCache]: Analyzing trace with hash 170109263, now seen corresponding path program 7 times [2024-06-14 13:11:51,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:51,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356747311] [2024-06-14 13:11:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:51,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:52,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356747311] [2024-06-14 13:11:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356747311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:52,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:52,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011087824] [2024-06-14 13:11:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:52,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:52,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:53,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:53,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 627 transitions, 8685 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:53,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:53,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:54,837 INFO L124 PetriNetUnfolderBase]: 3850/5937 cut-off events. [2024-06-14 13:11:54,838 INFO L125 PetriNetUnfolderBase]: For 605153/605155 co-relation queries the response was YES. [2024-06-14 13:11:54,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50422 conditions, 5937 events. 3850/5937 cut-off events. For 605153/605155 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 34212 event pairs, 721 based on Foata normal form. 10/5945 useless extension candidates. Maximal degree in co-relation 50224. Up to 5675 conditions per place. [2024-06-14 13:11:54,921 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 607 selfloop transitions, 44 changer transitions 0/655 dead transitions. [2024-06-14 13:11:54,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 655 transitions, 10184 flow [2024-06-14 13:11:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:11:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:11:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-14 13:11:54,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-14 13:11:54,921 INFO L175 Difference]: Start difference. First operand has 442 places, 627 transitions, 8685 flow. Second operand 12 states and 193 transitions. [2024-06-14 13:11:54,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 655 transitions, 10184 flow [2024-06-14 13:11:57,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 655 transitions, 10072 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:11:57,447 INFO L231 Difference]: Finished difference. Result has 444 places, 628 transitions, 8703 flow [2024-06-14 13:11:57,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8703, PETRI_PLACES=444, PETRI_TRANSITIONS=628} [2024-06-14 13:11:57,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-14 13:11:57,447 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 628 transitions, 8703 flow [2024-06-14 13:11:57,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:57,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:57,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:57,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:11:57,448 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:57,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash 164599013, now seen corresponding path program 8 times [2024-06-14 13:11:57,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:57,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590622255] [2024-06-14 13:11:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590622255] [2024-06-14 13:11:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590622255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:58,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:58,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:11:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942384759] [2024-06-14 13:11:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:58,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:11:58,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:11:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:11:58,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:11:58,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 628 transitions, 8703 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:58,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:11:58,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:00,394 INFO L124 PetriNetUnfolderBase]: 3911/6032 cut-off events. [2024-06-14 13:12:00,394 INFO L125 PetriNetUnfolderBase]: For 626924/626926 co-relation queries the response was YES. [2024-06-14 13:12:00,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51782 conditions, 6032 events. 3911/6032 cut-off events. For 626924/626926 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34846 event pairs, 721 based on Foata normal form. 8/6038 useless extension candidates. Maximal degree in co-relation 51584. Up to 5620 conditions per place. [2024-06-14 13:12:00,478 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 605 selfloop transitions, 51 changer transitions 0/660 dead transitions. [2024-06-14 13:12:00,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 660 transitions, 10479 flow [2024-06-14 13:12:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:12:00,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-14 13:12:00,479 INFO L175 Difference]: Start difference. First operand has 444 places, 628 transitions, 8703 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:12:00,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 660 transitions, 10479 flow [2024-06-14 13:12:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 660 transitions, 10376 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:03,080 INFO L231 Difference]: Finished difference. Result has 446 places, 631 transitions, 8805 flow [2024-06-14 13:12:03,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8805, PETRI_PLACES=446, PETRI_TRANSITIONS=631} [2024-06-14 13:12:03,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-14 13:12:03,080 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 631 transitions, 8805 flow [2024-06-14 13:12:03,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:03,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:03,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:03,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:12:03,080 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:03,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash 497406119, now seen corresponding path program 4 times [2024-06-14 13:12:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:03,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918597781] [2024-06-14 13:12:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:04,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918597781] [2024-06-14 13:12:04,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918597781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:04,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695271651] [2024-06-14 13:12:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:04,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:04,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 631 transitions, 8805 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:04,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:04,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:04,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:05,919 INFO L124 PetriNetUnfolderBase]: 3919/6044 cut-off events. [2024-06-14 13:12:05,919 INFO L125 PetriNetUnfolderBase]: For 612319/612321 co-relation queries the response was YES. [2024-06-14 13:12:05,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52053 conditions, 6044 events. 3919/6044 cut-off events. For 612319/612321 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 34980 event pairs, 788 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 51853. Up to 5868 conditions per place. [2024-06-14 13:12:06,004 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 19 changer transitions 0/646 dead transitions. [2024-06-14 13:12:06,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 646 transitions, 10202 flow [2024-06-14 13:12:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:12:06,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:12:06,006 INFO L175 Difference]: Start difference. First operand has 446 places, 631 transitions, 8805 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:12:06,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 646 transitions, 10202 flow [2024-06-14 13:12:08,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 646 transitions, 10120 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:08,943 INFO L231 Difference]: Finished difference. Result has 448 places, 633 transitions, 8831 flow [2024-06-14 13:12:08,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8723, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8831, PETRI_PLACES=448, PETRI_TRANSITIONS=633} [2024-06-14 13:12:08,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 13:12:08,943 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 633 transitions, 8831 flow [2024-06-14 13:12:08,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:08,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:08,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:08,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:12:08,944 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:08,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1310259261, now seen corresponding path program 5 times [2024-06-14 13:12:08,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:08,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734165601] [2024-06-14 13:12:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:08,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:09,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:09,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734165601] [2024-06-14 13:12:09,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734165601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:09,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:09,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388273784] [2024-06-14 13:12:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:10,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:10,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 633 transitions, 8831 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:10,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:10,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:11,870 INFO L124 PetriNetUnfolderBase]: 3927/6056 cut-off events. [2024-06-14 13:12:11,870 INFO L125 PetriNetUnfolderBase]: For 622246/622248 co-relation queries the response was YES. [2024-06-14 13:12:11,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52207 conditions, 6056 events. 3927/6056 cut-off events. For 622246/622248 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35086 event pairs, 790 based on Foata normal form. 2/6056 useless extension candidates. Maximal degree in co-relation 52005. Up to 5866 conditions per place. [2024-06-14 13:12:11,955 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 622 selfloop transitions, 22 changer transitions 0/648 dead transitions. [2024-06-14 13:12:11,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 648 transitions, 10207 flow [2024-06-14 13:12:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:12:11,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:12:11,956 INFO L175 Difference]: Start difference. First operand has 448 places, 633 transitions, 8831 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:12:11,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 648 transitions, 10207 flow [2024-06-14 13:12:15,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 648 transitions, 10118 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:15,117 INFO L231 Difference]: Finished difference. Result has 450 places, 635 transitions, 8841 flow [2024-06-14 13:12:15,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8742, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8841, PETRI_PLACES=450, PETRI_TRANSITIONS=635} [2024-06-14 13:12:15,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:12:15,117 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 635 transitions, 8841 flow [2024-06-14 13:12:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:15,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:12:15,118 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:15,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2022405061, now seen corresponding path program 6 times [2024-06-14 13:12:15,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:15,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469606500] [2024-06-14 13:12:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469606500] [2024-06-14 13:12:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469606500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:16,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432784166] [2024-06-14 13:12:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:16,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:16,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:16,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:16,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 635 transitions, 8841 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:16,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:16,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:16,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:17,839 INFO L124 PetriNetUnfolderBase]: 3935/6068 cut-off events. [2024-06-14 13:12:17,839 INFO L125 PetriNetUnfolderBase]: For 634721/634723 co-relation queries the response was YES. [2024-06-14 13:12:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52500 conditions, 6068 events. 3935/6068 cut-off events. For 634721/634723 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 35195 event pairs, 781 based on Foata normal form. 2/6068 useless extension candidates. Maximal degree in co-relation 52297. Up to 5848 conditions per place. [2024-06-14 13:12:17,926 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 34 changer transitions 0/654 dead transitions. [2024-06-14 13:12:17,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 654 transitions, 10282 flow [2024-06-14 13:12:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:12:17,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:12:17,927 INFO L175 Difference]: Start difference. First operand has 450 places, 635 transitions, 8841 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:12:17,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 654 transitions, 10282 flow [2024-06-14 13:12:21,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 654 transitions, 10199 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:21,183 INFO L231 Difference]: Finished difference. Result has 452 places, 637 transitions, 8902 flow [2024-06-14 13:12:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8758, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8902, PETRI_PLACES=452, PETRI_TRANSITIONS=637} [2024-06-14 13:12:21,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-14 13:12:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 637 transitions, 8902 flow [2024-06-14 13:12:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:21,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:21,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:12:21,184 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:21,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash 497198357, now seen corresponding path program 9 times [2024-06-14 13:12:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489329661] [2024-06-14 13:12:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:22,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:22,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489329661] [2024-06-14 13:12:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489329661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:22,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399417477] [2024-06-14 13:12:22,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:22,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:22,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 637 transitions, 8902 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:22,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:22,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:22,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:24,265 INFO L124 PetriNetUnfolderBase]: 3971/6124 cut-off events. [2024-06-14 13:12:24,265 INFO L125 PetriNetUnfolderBase]: For 689557/689559 co-relation queries the response was YES. [2024-06-14 13:12:24,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53344 conditions, 6124 events. 3971/6124 cut-off events. For 689557/689559 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35600 event pairs, 792 based on Foata normal form. 10/6132 useless extension candidates. Maximal degree in co-relation 53140. Up to 5894 conditions per place. [2024-06-14 13:12:24,353 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 631 selfloop transitions, 22 changer transitions 0/657 dead transitions. [2024-06-14 13:12:24,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 657 transitions, 10373 flow [2024-06-14 13:12:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:12:24,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:12:24,355 INFO L175 Difference]: Start difference. First operand has 452 places, 637 transitions, 8902 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:12:24,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 657 transitions, 10373 flow [2024-06-14 13:12:27,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 657 transitions, 10272 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:27,759 INFO L231 Difference]: Finished difference. Result has 457 places, 638 transitions, 8897 flow [2024-06-14 13:12:27,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8897, PETRI_PLACES=457, PETRI_TRANSITIONS=638} [2024-06-14 13:12:27,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 13:12:27,760 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 638 transitions, 8897 flow [2024-06-14 13:12:27,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:27,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:27,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:27,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:12:27,761 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:27,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 763110839, now seen corresponding path program 7 times [2024-06-14 13:12:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:27,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286070666] [2024-06-14 13:12:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:28,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286070666] [2024-06-14 13:12:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286070666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:28,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:28,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986113428] [2024-06-14 13:12:28,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:28,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:28,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:28,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 638 transitions, 8897 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:28,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:28,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:28,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:30,554 INFO L124 PetriNetUnfolderBase]: 3979/6134 cut-off events. [2024-06-14 13:12:30,554 INFO L125 PetriNetUnfolderBase]: For 664482/664484 co-relation queries the response was YES. [2024-06-14 13:12:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53522 conditions, 6134 events. 3979/6134 cut-off events. For 664482/664484 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35590 event pairs, 794 based on Foata normal form. 2/6134 useless extension candidates. Maximal degree in co-relation 53317. Up to 5955 conditions per place. [2024-06-14 13:12:30,642 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 630 selfloop transitions, 19 changer transitions 0/653 dead transitions. [2024-06-14 13:12:30,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 653 transitions, 10279 flow [2024-06-14 13:12:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:12:30,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:12:30,644 INFO L175 Difference]: Start difference. First operand has 457 places, 638 transitions, 8897 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:12:30,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 653 transitions, 10279 flow [2024-06-14 13:12:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 653 transitions, 10195 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:34,869 INFO L231 Difference]: Finished difference. Result has 457 places, 640 transitions, 8912 flow [2024-06-14 13:12:34,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8813, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8912, PETRI_PLACES=457, PETRI_TRANSITIONS=640} [2024-06-14 13:12:34,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 13:12:34,870 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 640 transitions, 8912 flow [2024-06-14 13:12:34,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:34,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:34,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:12:34,870 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:34,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:34,870 INFO L85 PathProgramCache]: Analyzing trace with hash 274931141, now seen corresponding path program 8 times [2024-06-14 13:12:34,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:34,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89379600] [2024-06-14 13:12:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:35,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89379600] [2024-06-14 13:12:35,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89379600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:35,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:35,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782525055] [2024-06-14 13:12:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:35,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:35,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:35,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 640 transitions, 8912 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:35,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:35,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:35,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:37,689 INFO L124 PetriNetUnfolderBase]: 3987/6148 cut-off events. [2024-06-14 13:12:37,689 INFO L125 PetriNetUnfolderBase]: For 673516/673518 co-relation queries the response was YES. [2024-06-14 13:12:37,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53580 conditions, 6148 events. 3987/6148 cut-off events. For 673516/673518 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35757 event pairs, 791 based on Foata normal form. 2/6148 useless extension candidates. Maximal degree in co-relation 53374. Up to 5905 conditions per place. [2024-06-14 13:12:37,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 619 selfloop transitions, 39 changer transitions 0/662 dead transitions. [2024-06-14 13:12:37,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 662 transitions, 10627 flow [2024-06-14 13:12:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:12:37,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:12:37,782 INFO L175 Difference]: Start difference. First operand has 457 places, 640 transitions, 8912 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:12:37,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 662 transitions, 10627 flow [2024-06-14 13:12:41,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 662 transitions, 10544 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:41,570 INFO L231 Difference]: Finished difference. Result has 460 places, 644 transitions, 9058 flow [2024-06-14 13:12:41,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9058, PETRI_PLACES=460, PETRI_TRANSITIONS=644} [2024-06-14 13:12:41,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-14 13:12:41,571 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 644 transitions, 9058 flow [2024-06-14 13:12:41,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:41,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:41,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:12:41,571 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:41,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 274715939, now seen corresponding path program 10 times [2024-06-14 13:12:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:41,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717611494] [2024-06-14 13:12:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:42,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:42,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717611494] [2024-06-14 13:12:42,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717611494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:42,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:42,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:42,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864843455] [2024-06-14 13:12:42,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:42,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:42,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:42,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 644 transitions, 9058 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:42,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:42,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:42,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:44,528 INFO L124 PetriNetUnfolderBase]: 4023/6204 cut-off events. [2024-06-14 13:12:44,529 INFO L125 PetriNetUnfolderBase]: For 732651/732653 co-relation queries the response was YES. [2024-06-14 13:12:44,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 6204 events. 4023/6204 cut-off events. For 732651/732653 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36184 event pairs, 795 based on Foata normal form. 10/6212 useless extension candidates. Maximal degree in co-relation 54327. Up to 5930 conditions per place. [2024-06-14 13:12:44,626 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 627 selfloop transitions, 37 changer transitions 0/668 dead transitions. [2024-06-14 13:12:44,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 668 transitions, 10577 flow [2024-06-14 13:12:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:12:44,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:12:44,627 INFO L175 Difference]: Start difference. First operand has 460 places, 644 transitions, 9058 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:12:44,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 668 transitions, 10577 flow [2024-06-14 13:12:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 668 transitions, 10453 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:48,293 INFO L231 Difference]: Finished difference. Result has 464 places, 645 transitions, 9064 flow [2024-06-14 13:12:48,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9064, PETRI_PLACES=464, PETRI_TRANSITIONS=645} [2024-06-14 13:12:48,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 13:12:48,293 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 645 transitions, 9064 flow [2024-06-14 13:12:48,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:48,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:48,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:12:48,293 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash 753906412, now seen corresponding path program 1 times [2024-06-14 13:12:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638013030] [2024-06-14 13:12:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:49,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638013030] [2024-06-14 13:12:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638013030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:49,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:49,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:49,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435136067] [2024-06-14 13:12:49,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:49,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:49,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:49,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 645 transitions, 9064 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:51,308 INFO L124 PetriNetUnfolderBase]: 4020/6200 cut-off events. [2024-06-14 13:12:51,308 INFO L125 PetriNetUnfolderBase]: For 693382/693384 co-relation queries the response was YES. [2024-06-14 13:12:51,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54492 conditions, 6200 events. 4020/6200 cut-off events. For 693382/693384 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 36154 event pairs, 805 based on Foata normal form. 1/6199 useless extension candidates. Maximal degree in co-relation 54283. Up to 6010 conditions per place. [2024-06-14 13:12:51,409 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 31 changer transitions 0/658 dead transitions. [2024-06-14 13:12:51,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 658 transitions, 10434 flow [2024-06-14 13:12:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:12:51,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 13:12:51,410 INFO L175 Difference]: Start difference. First operand has 464 places, 645 transitions, 9064 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:12:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 658 transitions, 10434 flow [2024-06-14 13:12:55,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 658 transitions, 10315 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:55,473 INFO L231 Difference]: Finished difference. Result has 465 places, 645 transitions, 9017 flow [2024-06-14 13:12:55,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8945, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9017, PETRI_PLACES=465, PETRI_TRANSITIONS=645} [2024-06-14 13:12:55,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 13:12:55,474 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 645 transitions, 9017 flow [2024-06-14 13:12:55,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:55,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:55,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:55,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:12:55,475 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:55,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 753906629, now seen corresponding path program 9 times [2024-06-14 13:12:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713692317] [2024-06-14 13:12:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:56,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:56,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713692317] [2024-06-14 13:12:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713692317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:56,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:56,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:12:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901598284] [2024-06-14 13:12:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:12:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:12:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:12:56,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:12:56,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 645 transitions, 9017 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:56,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:56,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:12:56,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:58,373 INFO L124 PetriNetUnfolderBase]: 4028/6212 cut-off events. [2024-06-14 13:12:58,373 INFO L125 PetriNetUnfolderBase]: For 706709/706711 co-relation queries the response was YES. [2024-06-14 13:12:58,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54397 conditions, 6212 events. 4028/6212 cut-off events. For 706709/706711 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36164 event pairs, 809 based on Foata normal form. 2/6212 useless extension candidates. Maximal degree in co-relation 54187. Up to 6021 conditions per place. [2024-06-14 13:12:58,476 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 627 selfloop transitions, 29 changer transitions 0/660 dead transitions. [2024-06-14 13:12:58,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 660 transitions, 10441 flow [2024-06-14 13:12:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:12:58,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:12:58,477 INFO L175 Difference]: Start difference. First operand has 465 places, 645 transitions, 9017 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:12:58,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 660 transitions, 10441 flow [2024-06-14 13:13:01,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 660 transitions, 10238 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:13:01,679 INFO L231 Difference]: Finished difference. Result has 464 places, 647 transitions, 8944 flow [2024-06-14 13:13:01,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8944, PETRI_PLACES=464, PETRI_TRANSITIONS=647} [2024-06-14 13:13:01,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 13:13:01,680 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 647 transitions, 8944 flow [2024-06-14 13:13:01,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:01,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:01,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:01,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:13:01,680 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:01,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2016840871, now seen corresponding path program 10 times [2024-06-14 13:13:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:01,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718310973] [2024-06-14 13:13:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:02,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718310973] [2024-06-14 13:13:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718310973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:02,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755269282] [2024-06-14 13:13:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:02,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:02,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:02,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 647 transitions, 8944 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:02,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:02,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:02,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:04,463 INFO L124 PetriNetUnfolderBase]: 4023/6205 cut-off events. [2024-06-14 13:13:04,463 INFO L125 PetriNetUnfolderBase]: For 709380/709382 co-relation queries the response was YES. [2024-06-14 13:13:04,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54059 conditions, 6205 events. 4023/6205 cut-off events. For 709380/709382 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36210 event pairs, 797 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 53850. Up to 5985 conditions per place. [2024-06-14 13:13:04,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 627 selfloop transitions, 36 changer transitions 0/667 dead transitions. [2024-06-14 13:13:04,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 667 transitions, 10354 flow [2024-06-14 13:13:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:13:04,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:13:04,572 INFO L175 Difference]: Start difference. First operand has 464 places, 647 transitions, 8944 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:13:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 667 transitions, 10354 flow [2024-06-14 13:13:08,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 667 transitions, 10214 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:08,531 INFO L231 Difference]: Finished difference. Result has 466 places, 647 transitions, 8881 flow [2024-06-14 13:13:08,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8804, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8881, PETRI_PLACES=466, PETRI_TRANSITIONS=647} [2024-06-14 13:13:08,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-14 13:13:08,532 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 647 transitions, 8881 flow [2024-06-14 13:13:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:08,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:08,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:08,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:13:08,532 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:08,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash 753914069, now seen corresponding path program 11 times [2024-06-14 13:13:08,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:08,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289154422] [2024-06-14 13:13:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289154422] [2024-06-14 13:13:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289154422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955956] [2024-06-14 13:13:09,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:09,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:09,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 647 transitions, 8881 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:09,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:09,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:09,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:11,349 INFO L124 PetriNetUnfolderBase]: 4018/6198 cut-off events. [2024-06-14 13:13:11,349 INFO L125 PetriNetUnfolderBase]: For 697326/697328 co-relation queries the response was YES. [2024-06-14 13:13:11,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53654 conditions, 6198 events. 4018/6198 cut-off events. For 697326/697328 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36118 event pairs, 803 based on Foata normal form. 2/6198 useless extension candidates. Maximal degree in co-relation 53444. Up to 5979 conditions per place. [2024-06-14 13:13:11,450 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 623 selfloop transitions, 35 changer transitions 0/662 dead transitions. [2024-06-14 13:13:11,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 662 transitions, 10303 flow [2024-06-14 13:13:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:13:11,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 13:13:11,451 INFO L175 Difference]: Start difference. First operand has 466 places, 647 transitions, 8881 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:13:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 662 transitions, 10303 flow [2024-06-14 13:13:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 662 transitions, 10241 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:14,713 INFO L231 Difference]: Finished difference. Result has 469 places, 649 transitions, 8965 flow [2024-06-14 13:13:14,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8819, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8965, PETRI_PLACES=469, PETRI_TRANSITIONS=649} [2024-06-14 13:13:14,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 13:13:14,714 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 649 transitions, 8965 flow [2024-06-14 13:13:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:14,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:14,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:13:14,714 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:14,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash 269205689, now seen corresponding path program 11 times [2024-06-14 13:13:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105965532] [2024-06-14 13:13:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:14,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:15,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:15,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105965532] [2024-06-14 13:13:15,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105965532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:15,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:15,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:15,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010214503] [2024-06-14 13:13:15,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:15,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:15,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:15,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:15,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 649 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:15,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:15,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:15,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:17,664 INFO L124 PetriNetUnfolderBase]: 4152/6408 cut-off events. [2024-06-14 13:13:17,664 INFO L125 PetriNetUnfolderBase]: For 819477/819479 co-relation queries the response was YES. [2024-06-14 13:13:17,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57019 conditions, 6408 events. 4152/6408 cut-off events. For 819477/819479 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37590 event pairs, 809 based on Foata normal form. 8/6414 useless extension candidates. Maximal degree in co-relation 56808. Up to 5889 conditions per place. [2024-06-14 13:13:17,767 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 64 changer transitions 0/691 dead transitions. [2024-06-14 13:13:17,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 691 transitions, 10933 flow [2024-06-14 13:13:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:13:17,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-14 13:13:17,768 INFO L175 Difference]: Start difference. First operand has 469 places, 649 transitions, 8965 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:13:17,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 691 transitions, 10933 flow [2024-06-14 13:13:21,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 691 transitions, 10795 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:21,776 INFO L231 Difference]: Finished difference. Result has 472 places, 655 transitions, 9159 flow [2024-06-14 13:13:21,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8831, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9159, PETRI_PLACES=472, PETRI_TRANSITIONS=655} [2024-06-14 13:13:21,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-14 13:13:21,776 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 655 transitions, 9159 flow [2024-06-14 13:13:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:21,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:21,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:13:21,777 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:21,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2016834919, now seen corresponding path program 12 times [2024-06-14 13:13:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931618046] [2024-06-14 13:13:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:22,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931618046] [2024-06-14 13:13:22,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931618046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:22,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:22,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512871153] [2024-06-14 13:13:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:22,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:22,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 655 transitions, 9159 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:22,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:22,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:24,725 INFO L124 PetriNetUnfolderBase]: 4185/6459 cut-off events. [2024-06-14 13:13:24,725 INFO L125 PetriNetUnfolderBase]: For 835965/835967 co-relation queries the response was YES. [2024-06-14 13:13:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57204 conditions, 6459 events. 4185/6459 cut-off events. For 835965/835967 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37990 event pairs, 837 based on Foata normal form. 16/6473 useless extension candidates. Maximal degree in co-relation 56991. Up to 6165 conditions per place. [2024-06-14 13:13:24,832 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 641 selfloop transitions, 40 changer transitions 0/685 dead transitions. [2024-06-14 13:13:24,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 685 transitions, 10764 flow [2024-06-14 13:13:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:13:24,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 13:13:24,833 INFO L175 Difference]: Start difference. First operand has 472 places, 655 transitions, 9159 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:13:24,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 685 transitions, 10764 flow [2024-06-14 13:13:28,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 685 transitions, 10630 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:28,715 INFO L231 Difference]: Finished difference. Result has 477 places, 659 transitions, 9214 flow [2024-06-14 13:13:28,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9214, PETRI_PLACES=477, PETRI_TRANSITIONS=659} [2024-06-14 13:13:28,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 13:13:28,716 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 659 transitions, 9214 flow [2024-06-14 13:13:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:28,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:28,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:28,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:13:28,717 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:28,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2016690769, now seen corresponding path program 13 times [2024-06-14 13:13:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098191173] [2024-06-14 13:13:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:28,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098191173] [2024-06-14 13:13:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098191173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:29,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698166784] [2024-06-14 13:13:29,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:29,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:29,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 659 transitions, 9214 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:29,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:29,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:31,539 INFO L124 PetriNetUnfolderBase]: 4162/6426 cut-off events. [2024-06-14 13:13:31,539 INFO L125 PetriNetUnfolderBase]: For 750154/750156 co-relation queries the response was YES. [2024-06-14 13:13:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55497 conditions, 6426 events. 4162/6426 cut-off events. For 750154/750156 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37762 event pairs, 821 based on Foata normal form. 10/6434 useless extension candidates. Maximal degree in co-relation 55281. Up to 6116 conditions per place. [2024-06-14 13:13:31,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 62 changer transitions 0/689 dead transitions. [2024-06-14 13:13:31,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 689 transitions, 10792 flow [2024-06-14 13:13:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:13:31,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:13:31,650 INFO L175 Difference]: Start difference. First operand has 477 places, 659 transitions, 9214 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:13:31,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 689 transitions, 10792 flow [2024-06-14 13:13:35,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 689 transitions, 10512 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-14 13:13:35,189 INFO L231 Difference]: Finished difference. Result has 476 places, 660 transitions, 9109 flow [2024-06-14 13:13:35,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9109, PETRI_PLACES=476, PETRI_TRANSITIONS=660} [2024-06-14 13:13:35,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-14 13:13:35,189 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 660 transitions, 9109 flow [2024-06-14 13:13:35,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:35,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:35,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:35,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:13:35,190 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:35,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -390719199, now seen corresponding path program 1 times [2024-06-14 13:13:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:35,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183253014] [2024-06-14 13:13:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:35,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:36,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:36,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183253014] [2024-06-14 13:13:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183253014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:36,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:36,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:36,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810305381] [2024-06-14 13:13:36,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:36,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:36,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:36,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:36,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 660 transitions, 9109 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:36,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:36,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:36,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:38,343 INFO L124 PetriNetUnfolderBase]: 4188/6465 cut-off events. [2024-06-14 13:13:38,343 INFO L125 PetriNetUnfolderBase]: For 712116/712118 co-relation queries the response was YES. [2024-06-14 13:13:38,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55251 conditions, 6465 events. 4188/6465 cut-off events. For 712116/712118 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 37975 event pairs, 667 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 55038. Up to 5723 conditions per place. [2024-06-14 13:13:38,454 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 177 changer transitions 0/695 dead transitions. [2024-06-14 13:13:38,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 695 transitions, 11105 flow [2024-06-14 13:13:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:13:38,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:13:38,455 INFO L175 Difference]: Start difference. First operand has 476 places, 660 transitions, 9109 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:13:38,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 695 transitions, 11105 flow [2024-06-14 13:13:42,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 695 transitions, 10942 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:42,908 INFO L231 Difference]: Finished difference. Result has 477 places, 666 transitions, 9521 flow [2024-06-14 13:13:42,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8946, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9521, PETRI_PLACES=477, PETRI_TRANSITIONS=666} [2024-06-14 13:13:42,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 13:13:42,909 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 666 transitions, 9521 flow [2024-06-14 13:13:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:42,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:42,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:42,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:13:42,909 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash -40448431, now seen corresponding path program 2 times [2024-06-14 13:13:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464402683] [2024-06-14 13:13:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464402683] [2024-06-14 13:13:43,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464402683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:43,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:43,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865131310] [2024-06-14 13:13:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:43,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:43,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:44,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:44,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 666 transitions, 9521 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:44,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:44,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:46,156 INFO L124 PetriNetUnfolderBase]: 4214/6502 cut-off events. [2024-06-14 13:13:46,156 INFO L125 PetriNetUnfolderBase]: For 740603/740605 co-relation queries the response was YES. [2024-06-14 13:13:46,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56581 conditions, 6502 events. 4214/6502 cut-off events. For 740603/740605 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 38242 event pairs, 685 based on Foata normal form. 2/6495 useless extension candidates. Maximal degree in co-relation 56368. Up to 5975 conditions per place. [2024-06-14 13:13:46,277 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 124 changer transitions 0/699 dead transitions. [2024-06-14 13:13:46,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 699 transitions, 11554 flow [2024-06-14 13:13:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:13:46,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:13:46,278 INFO L175 Difference]: Start difference. First operand has 477 places, 666 transitions, 9521 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:13:46,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 699 transitions, 11554 flow [2024-06-14 13:13:50,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 699 transitions, 11290 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:50,354 INFO L231 Difference]: Finished difference. Result has 480 places, 672 transitions, 9740 flow [2024-06-14 13:13:50,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9279, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9740, PETRI_PLACES=480, PETRI_TRANSITIONS=672} [2024-06-14 13:13:50,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 13:13:50,354 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 672 transitions, 9740 flow [2024-06-14 13:13:50,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:50,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:50,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:50,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:13:50,354 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:50,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash -40442851, now seen corresponding path program 3 times [2024-06-14 13:13:50,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:50,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281899630] [2024-06-14 13:13:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:50,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:51,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:51,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281899630] [2024-06-14 13:13:51,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281899630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:51,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:51,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:51,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790722738] [2024-06-14 13:13:51,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:51,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:51,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:51,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:51,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 672 transitions, 9740 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:51,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:51,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:51,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:53,628 INFO L124 PetriNetUnfolderBase]: 4208/6492 cut-off events. [2024-06-14 13:13:53,628 INFO L125 PetriNetUnfolderBase]: For 728272/728274 co-relation queries the response was YES. [2024-06-14 13:13:53,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56429 conditions, 6492 events. 4208/6492 cut-off events. For 728272/728274 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38128 event pairs, 681 based on Foata normal form. 2/6485 useless extension candidates. Maximal degree in co-relation 56215. Up to 5970 conditions per place. [2024-06-14 13:13:53,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 128 changer transitions 0/700 dead transitions. [2024-06-14 13:13:53,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 700 transitions, 11349 flow [2024-06-14 13:13:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:13:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:13:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-14 13:13:53,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-14 13:13:53,743 INFO L175 Difference]: Start difference. First operand has 480 places, 672 transitions, 9740 flow. Second operand 11 states and 190 transitions. [2024-06-14 13:13:53,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 700 transitions, 11349 flow [2024-06-14 13:13:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 700 transitions, 11156 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:58,192 INFO L231 Difference]: Finished difference. Result has 486 places, 672 transitions, 9817 flow [2024-06-14 13:13:58,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9817, PETRI_PLACES=486, PETRI_TRANSITIONS=672} [2024-06-14 13:13:58,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-14 13:13:58,192 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 672 transitions, 9817 flow [2024-06-14 13:13:58,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:58,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:58,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:58,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:13:58,193 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:58,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash 243268723, now seen corresponding path program 4 times [2024-06-14 13:13:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902773837] [2024-06-14 13:13:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:59,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:59,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902773837] [2024-06-14 13:13:59,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902773837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:59,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:59,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:13:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864416855] [2024-06-14 13:13:59,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:59,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:13:59,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:13:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:13:59,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:13:59,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 672 transitions, 9817 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:59,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:59,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:13:59,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:01,235 INFO L124 PetriNetUnfolderBase]: 4218/6512 cut-off events. [2024-06-14 13:14:01,235 INFO L125 PetriNetUnfolderBase]: For 728670/728672 co-relation queries the response was YES. [2024-06-14 13:14:01,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56840 conditions, 6512 events. 4218/6512 cut-off events. For 728670/728672 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38392 event pairs, 733 based on Foata normal form. 2/6505 useless extension candidates. Maximal degree in co-relation 56625. Up to 5929 conditions per place. [2024-06-14 13:14:01,357 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 136 changer transitions 0/702 dead transitions. [2024-06-14 13:14:01,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 702 transitions, 11722 flow [2024-06-14 13:14:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:14:01,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-14 13:14:01,358 INFO L175 Difference]: Start difference. First operand has 486 places, 672 transitions, 9817 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:14:01,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 702 transitions, 11722 flow [2024-06-14 13:14:05,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 702 transitions, 11404 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 13:14:05,567 INFO L231 Difference]: Finished difference. Result has 482 places, 675 transitions, 9890 flow [2024-06-14 13:14:05,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9501, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9890, PETRI_PLACES=482, PETRI_TRANSITIONS=675} [2024-06-14 13:14:05,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 13:14:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 675 transitions, 9890 flow [2024-06-14 13:14:05,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:05,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:05,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:14:05,568 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 84245316, now seen corresponding path program 1 times [2024-06-14 13:14:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817869893] [2024-06-14 13:14:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:06,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817869893] [2024-06-14 13:14:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817869893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:06,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:06,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:06,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647368517] [2024-06-14 13:14:06,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 675 transitions, 9890 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:06,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:06,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:08,590 INFO L124 PetriNetUnfolderBase]: 4223/6513 cut-off events. [2024-06-14 13:14:08,590 INFO L125 PetriNetUnfolderBase]: For 723981/723983 co-relation queries the response was YES. [2024-06-14 13:14:08,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56979 conditions, 6513 events. 4223/6513 cut-off events. For 723981/723983 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38304 event pairs, 751 based on Foata normal form. 1/6505 useless extension candidates. Maximal degree in co-relation 56764. Up to 6208 conditions per place. [2024-06-14 13:14:08,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 624 selfloop transitions, 60 changer transitions 0/688 dead transitions. [2024-06-14 13:14:08,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 688 transitions, 11416 flow [2024-06-14 13:14:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:14:08,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:14:08,706 INFO L175 Difference]: Start difference. First operand has 482 places, 675 transitions, 9890 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:14:08,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 688 transitions, 11416 flow [2024-06-14 13:14:12,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 688 transitions, 10952 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:12,931 INFO L231 Difference]: Finished difference. Result has 480 places, 678 transitions, 9678 flow [2024-06-14 13:14:12,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9678, PETRI_PLACES=480, PETRI_TRANSITIONS=678} [2024-06-14 13:14:12,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 13:14:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 678 transitions, 9678 flow [2024-06-14 13:14:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:12,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:12,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:14:12,932 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:12,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash 83978189, now seen corresponding path program 5 times [2024-06-14 13:14:12,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:12,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443572940] [2024-06-14 13:14:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:13,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443572940] [2024-06-14 13:14:13,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443572940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:13,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:13,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486471852] [2024-06-14 13:14:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:13,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:13,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:14,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:14,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 678 transitions, 9678 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:14,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:14,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:15,907 INFO L124 PetriNetUnfolderBase]: 4233/6523 cut-off events. [2024-06-14 13:14:15,907 INFO L125 PetriNetUnfolderBase]: For 728443/728445 co-relation queries the response was YES. [2024-06-14 13:14:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56739 conditions, 6523 events. 4233/6523 cut-off events. For 728443/728445 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 38342 event pairs, 747 based on Foata normal form. 2/6516 useless extension candidates. Maximal degree in co-relation 56525. Up to 6209 conditions per place. [2024-06-14 13:14:16,033 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 635 selfloop transitions, 55 changer transitions 0/694 dead transitions. [2024-06-14 13:14:16,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 694 transitions, 11248 flow [2024-06-14 13:14:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:14:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:14:16,034 INFO L175 Difference]: Start difference. First operand has 480 places, 678 transitions, 9678 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:14:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 694 transitions, 11248 flow [2024-06-14 13:14:20,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 694 transitions, 11088 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:20,328 INFO L231 Difference]: Finished difference. Result has 482 places, 681 transitions, 9742 flow [2024-06-14 13:14:20,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9518, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9742, PETRI_PLACES=482, PETRI_TRANSITIONS=681} [2024-06-14 13:14:20,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 13:14:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 681 transitions, 9742 flow [2024-06-14 13:14:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:20,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:14:20,329 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:20,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1372422086, now seen corresponding path program 1 times [2024-06-14 13:14:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299001985] [2024-06-14 13:14:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:21,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299001985] [2024-06-14 13:14:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299001985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:21,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:21,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849661365] [2024-06-14 13:14:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:21,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:21,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:21,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 681 transitions, 9742 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:21,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:21,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:21,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:23,397 INFO L124 PetriNetUnfolderBase]: 4230/6533 cut-off events. [2024-06-14 13:14:23,397 INFO L125 PetriNetUnfolderBase]: For 718753/718755 co-relation queries the response was YES. [2024-06-14 13:14:23,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56590 conditions, 6533 events. 4230/6533 cut-off events. For 718753/718755 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38538 event pairs, 775 based on Foata normal form. 1/6525 useless extension candidates. Maximal degree in co-relation 56376. Up to 6039 conditions per place. [2024-06-14 13:14:23,512 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 589 selfloop transitions, 108 changer transitions 0/701 dead transitions. [2024-06-14 13:14:23,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 701 transitions, 11204 flow [2024-06-14 13:14:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:14:23,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 13:14:23,513 INFO L175 Difference]: Start difference. First operand has 482 places, 681 transitions, 9742 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:14:23,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 701 transitions, 11204 flow [2024-06-14 13:14:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 701 transitions, 11014 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:27,472 INFO L231 Difference]: Finished difference. Result has 485 places, 683 transitions, 9903 flow [2024-06-14 13:14:27,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9903, PETRI_PLACES=485, PETRI_TRANSITIONS=683} [2024-06-14 13:14:27,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 13:14:27,472 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 683 transitions, 9903 flow [2024-06-14 13:14:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:27,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:27,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:27,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:14:27,473 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:27,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash 282047377, now seen corresponding path program 6 times [2024-06-14 13:14:27,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:27,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247194827] [2024-06-14 13:14:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:27,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247194827] [2024-06-14 13:14:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247194827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:28,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:28,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:28,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865462745] [2024-06-14 13:14:28,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:28,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:28,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:28,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:28,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 683 transitions, 9903 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:28,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:28,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:28,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:30,476 INFO L124 PetriNetUnfolderBase]: 4224/6539 cut-off events. [2024-06-14 13:14:30,476 INFO L125 PetriNetUnfolderBase]: For 713127/713129 co-relation queries the response was YES. [2024-06-14 13:14:30,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56628 conditions, 6539 events. 4224/6539 cut-off events. For 713127/713129 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38761 event pairs, 754 based on Foata normal form. 2/6532 useless extension candidates. Maximal degree in co-relation 56412. Up to 5937 conditions per place. [2024-06-14 13:14:30,588 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 131 changer transitions 0/706 dead transitions. [2024-06-14 13:14:30,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 706 transitions, 11498 flow [2024-06-14 13:14:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:14:30,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:14:30,589 INFO L175 Difference]: Start difference. First operand has 485 places, 683 transitions, 9903 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:14:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 706 transitions, 11498 flow [2024-06-14 13:14:35,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 706 transitions, 11152 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:35,247 INFO L231 Difference]: Finished difference. Result has 486 places, 683 transitions, 9837 flow [2024-06-14 13:14:35,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9561, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9837, PETRI_PLACES=486, PETRI_TRANSITIONS=683} [2024-06-14 13:14:35,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-14 13:14:35,248 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 683 transitions, 9837 flow [2024-06-14 13:14:35,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:35,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:35,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:35,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:14:35,248 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:35,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash 40075752, now seen corresponding path program 2 times [2024-06-14 13:14:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:35,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700287948] [2024-06-14 13:14:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700287948] [2024-06-14 13:14:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700287948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:36,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:36,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:36,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691303290] [2024-06-14 13:14:36,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:36,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 683 transitions, 9837 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:38,742 INFO L124 PetriNetUnfolderBase]: 4289/6629 cut-off events. [2024-06-14 13:14:38,742 INFO L125 PetriNetUnfolderBase]: For 720183/720192 co-relation queries the response was YES. [2024-06-14 13:14:38,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57366 conditions, 6629 events. 4289/6629 cut-off events. For 720183/720192 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 39307 event pairs, 760 based on Foata normal form. 7/6631 useless extension candidates. Maximal degree in co-relation 57149. Up to 5958 conditions per place. [2024-06-14 13:14:38,843 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 541 selfloop transitions, 211 changer transitions 0/756 dead transitions. [2024-06-14 13:14:38,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 756 transitions, 12235 flow [2024-06-14 13:14:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 13:14:38,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-14 13:14:38,844 INFO L175 Difference]: Start difference. First operand has 486 places, 683 transitions, 9837 flow. Second operand 11 states and 193 transitions. [2024-06-14 13:14:38,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 756 transitions, 12235 flow [2024-06-14 13:14:42,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 756 transitions, 12051 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:42,898 INFO L231 Difference]: Finished difference. Result has 493 places, 725 transitions, 10759 flow [2024-06-14 13:14:42,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9663, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10759, PETRI_PLACES=493, PETRI_TRANSITIONS=725} [2024-06-14 13:14:42,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-14 13:14:42,898 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 725 transitions, 10759 flow [2024-06-14 13:14:42,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:42,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:42,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:14:42,898 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:42,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash -126273110, now seen corresponding path program 1 times [2024-06-14 13:14:42,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:42,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655759232] [2024-06-14 13:14:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:42,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:43,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:43,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655759232] [2024-06-14 13:14:43,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655759232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:43,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:43,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129022482] [2024-06-14 13:14:43,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:43,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:43,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 725 transitions, 10759 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:43,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:43,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:43,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:46,155 INFO L124 PetriNetUnfolderBase]: 4403/6795 cut-off events. [2024-06-14 13:14:46,155 INFO L125 PetriNetUnfolderBase]: For 754146/754155 co-relation queries the response was YES. [2024-06-14 13:14:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59583 conditions, 6795 events. 4403/6795 cut-off events. For 754146/754155 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 40358 event pairs, 661 based on Foata normal form. 10/6800 useless extension candidates. Maximal degree in co-relation 59365. Up to 5987 conditions per place. [2024-06-14 13:14:46,275 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 597 selfloop transitions, 203 changer transitions 0/804 dead transitions. [2024-06-14 13:14:46,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 804 transitions, 13532 flow [2024-06-14 13:14:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-14 13:14:46,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-14 13:14:46,276 INFO L175 Difference]: Start difference. First operand has 493 places, 725 transitions, 10759 flow. Second operand 12 states and 215 transitions. [2024-06-14 13:14:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 804 transitions, 13532 flow [2024-06-14 13:14:51,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 804 transitions, 13308 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:51,087 INFO L231 Difference]: Finished difference. Result has 504 places, 759 transitions, 11728 flow [2024-06-14 13:14:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10535, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11728, PETRI_PLACES=504, PETRI_TRANSITIONS=759} [2024-06-14 13:14:51,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 13:14:51,087 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 759 transitions, 11728 flow [2024-06-14 13:14:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:51,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:14:51,088 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:51,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 40374282, now seen corresponding path program 3 times [2024-06-14 13:14:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394679147] [2024-06-14 13:14:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394679147] [2024-06-14 13:14:52,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394679147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:52,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:52,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:52,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986087270] [2024-06-14 13:14:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:52,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:52,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 759 transitions, 11728 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:52,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:52,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:52,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:54,257 INFO L124 PetriNetUnfolderBase]: 4413/6804 cut-off events. [2024-06-14 13:14:54,257 INFO L125 PetriNetUnfolderBase]: For 758854/758856 co-relation queries the response was YES. [2024-06-14 13:14:54,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61482 conditions, 6804 events. 4413/6804 cut-off events. For 758854/758856 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 40415 event pairs, 775 based on Foata normal form. 1/6796 useless extension candidates. Maximal degree in co-relation 61260. Up to 5908 conditions per place. [2024-06-14 13:14:54,383 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 287 changer transitions 0/786 dead transitions. [2024-06-14 13:14:54,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 786 transitions, 13649 flow [2024-06-14 13:14:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:54,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:14:54,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:14:54,383 INFO L175 Difference]: Start difference. First operand has 504 places, 759 transitions, 11728 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:14:54,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 786 transitions, 13649 flow [2024-06-14 13:14:58,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 786 transitions, 13337 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:58,575 INFO L231 Difference]: Finished difference. Result has 504 places, 765 transitions, 12080 flow [2024-06-14 13:14:58,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11420, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12080, PETRI_PLACES=504, PETRI_TRANSITIONS=765} [2024-06-14 13:14:58,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 13:14:58,576 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 765 transitions, 12080 flow [2024-06-14 13:14:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:58,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:58,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:14:58,576 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:58,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1567433640, now seen corresponding path program 4 times [2024-06-14 13:14:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120129781] [2024-06-14 13:14:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120129781] [2024-06-14 13:14:59,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120129781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:59,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:59,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:14:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883476355] [2024-06-14 13:14:59,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:14:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:14:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:14:59,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:14:59,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 765 transitions, 12080 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:59,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:59,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:14:59,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:01,656 INFO L124 PetriNetUnfolderBase]: 4418/6813 cut-off events. [2024-06-14 13:15:01,657 INFO L125 PetriNetUnfolderBase]: For 746170/746172 co-relation queries the response was YES. [2024-06-14 13:15:01,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61776 conditions, 6813 events. 4418/6813 cut-off events. For 746170/746172 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40395 event pairs, 777 based on Foata normal form. 1/6805 useless extension candidates. Maximal degree in co-relation 61554. Up to 6126 conditions per place. [2024-06-14 13:15:01,790 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 550 selfloop transitions, 232 changer transitions 0/786 dead transitions. [2024-06-14 13:15:01,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 786 transitions, 13767 flow [2024-06-14 13:15:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:15:01,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:15:01,791 INFO L175 Difference]: Start difference. First operand has 504 places, 765 transitions, 12080 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:15:01,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 786 transitions, 13767 flow [2024-06-14 13:15:06,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 786 transitions, 13253 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:06,153 INFO L231 Difference]: Finished difference. Result has 507 places, 768 transitions, 12107 flow [2024-06-14 13:15:06,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11569, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12107, PETRI_PLACES=507, PETRI_TRANSITIONS=768} [2024-06-14 13:15:06,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-14 13:15:06,154 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 768 transitions, 12107 flow [2024-06-14 13:15:06,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:06,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:06,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:06,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:15:06,154 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:06,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:06,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1451957524, now seen corresponding path program 1 times [2024-06-14 13:15:06,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:06,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79156887] [2024-06-14 13:15:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:06,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:07,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:07,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79156887] [2024-06-14 13:15:07,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79156887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:07,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:07,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:07,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358579880] [2024-06-14 13:15:07,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:07,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:07,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:07,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:07,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:07,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:07,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 768 transitions, 12107 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:07,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:07,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:07,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:09,324 INFO L124 PetriNetUnfolderBase]: 4462/6873 cut-off events. [2024-06-14 13:15:09,324 INFO L125 PetriNetUnfolderBase]: For 824828/824830 co-relation queries the response was YES. [2024-06-14 13:15:09,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62489 conditions, 6873 events. 4462/6873 cut-off events. For 824828/824830 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 40758 event pairs, 681 based on Foata normal form. 12/6876 useless extension candidates. Maximal degree in co-relation 62267. Up to 6347 conditions per place. [2024-06-14 13:15:09,457 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 690 selfloop transitions, 102 changer transitions 0/796 dead transitions. [2024-06-14 13:15:09,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 796 transitions, 13989 flow [2024-06-14 13:15:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:15:09,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 13:15:09,457 INFO L175 Difference]: Start difference. First operand has 507 places, 768 transitions, 12107 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:15:09,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 796 transitions, 13989 flow [2024-06-14 13:15:13,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 796 transitions, 13516 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:13,593 INFO L231 Difference]: Finished difference. Result has 510 places, 769 transitions, 11880 flow [2024-06-14 13:15:13,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11634, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11880, PETRI_PLACES=510, PETRI_TRANSITIONS=769} [2024-06-14 13:15:13,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 13:15:13,594 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 769 transitions, 11880 flow [2024-06-14 13:15:13,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:13,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:13,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:13,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:15:13,595 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1452142470, now seen corresponding path program 5 times [2024-06-14 13:15:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741601892] [2024-06-14 13:15:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741601892] [2024-06-14 13:15:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741601892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:14,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:14,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:14,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736087801] [2024-06-14 13:15:14,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:14,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:14,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:14,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 769 transitions, 11880 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:14,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:14,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:14,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:17,031 INFO L124 PetriNetUnfolderBase]: 4467/6895 cut-off events. [2024-06-14 13:15:17,031 INFO L125 PetriNetUnfolderBase]: For 773350/773359 co-relation queries the response was YES. [2024-06-14 13:15:17,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62501 conditions, 6895 events. 4467/6895 cut-off events. For 773350/773359 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 41128 event pairs, 777 based on Foata normal form. 7/6897 useless extension candidates. Maximal degree in co-relation 62278. Up to 6508 conditions per place. [2024-06-14 13:15:17,164 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 680 selfloop transitions, 106 changer transitions 0/790 dead transitions. [2024-06-14 13:15:17,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 790 transitions, 13587 flow [2024-06-14 13:15:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:15:17,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:15:17,165 INFO L175 Difference]: Start difference. First operand has 510 places, 769 transitions, 11880 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:15:17,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 790 transitions, 13587 flow [2024-06-14 13:15:21,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 790 transitions, 13383 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:21,543 INFO L231 Difference]: Finished difference. Result has 514 places, 773 transitions, 12008 flow [2024-06-14 13:15:21,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11676, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12008, PETRI_PLACES=514, PETRI_TRANSITIONS=773} [2024-06-14 13:15:21,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-14 13:15:21,543 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 773 transitions, 12008 flow [2024-06-14 13:15:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:21,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:21,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:21,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:15:21,544 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:21,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1451964468, now seen corresponding path program 2 times [2024-06-14 13:15:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:21,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447164640] [2024-06-14 13:15:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:21,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447164640] [2024-06-14 13:15:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447164640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:22,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:22,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371079558] [2024-06-14 13:15:22,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:22,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:22,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 773 transitions, 12008 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:22,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:22,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:22,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:24,941 INFO L124 PetriNetUnfolderBase]: 4487/6923 cut-off events. [2024-06-14 13:15:24,941 INFO L125 PetriNetUnfolderBase]: For 803991/804000 co-relation queries the response was YES. [2024-06-14 13:15:25,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62789 conditions, 6923 events. 4487/6923 cut-off events. For 803991/804000 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 41308 event pairs, 691 based on Foata normal form. 10/6928 useless extension candidates. Maximal degree in co-relation 62564. Up to 6486 conditions per place. [2024-06-14 13:15:25,065 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 713 selfloop transitions, 92 changer transitions 0/809 dead transitions. [2024-06-14 13:15:25,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 809 transitions, 13987 flow [2024-06-14 13:15:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:15:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:15:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-14 13:15:25,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:15:25,067 INFO L175 Difference]: Start difference. First operand has 514 places, 773 transitions, 12008 flow. Second operand 12 states and 204 transitions. [2024-06-14 13:15:25,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 809 transitions, 13987 flow [2024-06-14 13:15:30,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 809 transitions, 13784 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:30,125 INFO L231 Difference]: Finished difference. Result has 521 places, 777 transitions, 12104 flow [2024-06-14 13:15:30,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11809, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12104, PETRI_PLACES=521, PETRI_TRANSITIONS=777} [2024-06-14 13:15:30,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-14 13:15:30,126 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 777 transitions, 12104 flow [2024-06-14 13:15:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:30,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:15:30,126 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:30,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 158466984, now seen corresponding path program 3 times [2024-06-14 13:15:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136819840] [2024-06-14 13:15:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136819840] [2024-06-14 13:15:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136819840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:31,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403077809] [2024-06-14 13:15:31,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:31,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:31,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 777 transitions, 12104 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:31,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:31,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:31,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:33,406 INFO L124 PetriNetUnfolderBase]: 4507/6947 cut-off events. [2024-06-14 13:15:33,406 INFO L125 PetriNetUnfolderBase]: For 818151/818160 co-relation queries the response was YES. [2024-06-14 13:15:33,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63287 conditions, 6947 events. 4507/6947 cut-off events. For 818151/818160 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 41346 event pairs, 689 based on Foata normal form. 10/6952 useless extension candidates. Maximal degree in co-relation 63061. Up to 6514 conditions per place. [2024-06-14 13:15:33,528 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 718 selfloop transitions, 89 changer transitions 0/811 dead transitions. [2024-06-14 13:15:33,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 811 transitions, 14087 flow [2024-06-14 13:15:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:15:33,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 13:15:33,530 INFO L175 Difference]: Start difference. First operand has 521 places, 777 transitions, 12104 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:15:33,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 811 transitions, 14087 flow [2024-06-14 13:15:38,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 811 transitions, 13848 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-14 13:15:38,333 INFO L231 Difference]: Finished difference. Result has 521 places, 781 transitions, 12162 flow [2024-06-14 13:15:38,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12162, PETRI_PLACES=521, PETRI_TRANSITIONS=781} [2024-06-14 13:15:38,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-14 13:15:38,334 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 781 transitions, 12162 flow [2024-06-14 13:15:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:15:38,334 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:38,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:38,334 INFO L85 PathProgramCache]: Analyzing trace with hash 202321630, now seen corresponding path program 4 times [2024-06-14 13:15:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36914701] [2024-06-14 13:15:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:38,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:39,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36914701] [2024-06-14 13:15:39,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36914701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:39,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:39,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:39,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220097910] [2024-06-14 13:15:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:39,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 781 transitions, 12162 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:39,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:39,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:39,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:41,684 INFO L124 PetriNetUnfolderBase]: 4527/6975 cut-off events. [2024-06-14 13:15:41,684 INFO L125 PetriNetUnfolderBase]: For 831178/831187 co-relation queries the response was YES. [2024-06-14 13:15:41,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63641 conditions, 6975 events. 4527/6975 cut-off events. For 831178/831187 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41537 event pairs, 685 based on Foata normal form. 10/6980 useless extension candidates. Maximal degree in co-relation 63414. Up to 6489 conditions per place. [2024-06-14 13:15:41,818 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 703 selfloop transitions, 112 changer transitions 0/819 dead transitions. [2024-06-14 13:15:41,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 819 transitions, 14212 flow [2024-06-14 13:15:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 13:15:41,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279379157427938 [2024-06-14 13:15:41,820 INFO L175 Difference]: Start difference. First operand has 521 places, 781 transitions, 12162 flow. Second operand 11 states and 193 transitions. [2024-06-14 13:15:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 819 transitions, 14212 flow [2024-06-14 13:15:46,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 819 transitions, 13971 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:46,631 INFO L231 Difference]: Finished difference. Result has 525 places, 787 transitions, 12337 flow [2024-06-14 13:15:46,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11921, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12337, PETRI_PLACES=525, PETRI_TRANSITIONS=787} [2024-06-14 13:15:46,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-14 13:15:46,632 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 787 transitions, 12337 flow [2024-06-14 13:15:46,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:46,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:46,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:46,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:15:46,632 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:46,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash 363944090, now seen corresponding path program 2 times [2024-06-14 13:15:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:46,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580026758] [2024-06-14 13:15:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:47,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580026758] [2024-06-14 13:15:47,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580026758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:47,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:47,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453114814] [2024-06-14 13:15:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:47,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:47,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:47,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:47,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 787 transitions, 12337 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:47,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:47,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:47,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:49,563 INFO L124 PetriNetUnfolderBase]: 4607/7095 cut-off events. [2024-06-14 13:15:49,563 INFO L125 PetriNetUnfolderBase]: For 898977/898986 co-relation queries the response was YES. [2024-06-14 13:15:49,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65022 conditions, 7095 events. 4607/7095 cut-off events. For 898977/898986 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 42355 event pairs, 697 based on Foata normal form. 18/7108 useless extension candidates. Maximal degree in co-relation 64793. Up to 6638 conditions per place. [2024-06-14 13:15:49,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 745 selfloop transitions, 68 changer transitions 0/817 dead transitions. [2024-06-14 13:15:49,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 817 transitions, 14302 flow [2024-06-14 13:15:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:15:49,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:15:49,701 INFO L175 Difference]: Start difference. First operand has 525 places, 787 transitions, 12337 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:15:49,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 817 transitions, 14302 flow [2024-06-14 13:15:55,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 817 transitions, 14025 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-14 13:15:55,011 INFO L231 Difference]: Finished difference. Result has 524 places, 789 transitions, 12270 flow [2024-06-14 13:15:55,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12060, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12270, PETRI_PLACES=524, PETRI_TRANSITIONS=789} [2024-06-14 13:15:55,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-14 13:15:55,012 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 789 transitions, 12270 flow [2024-06-14 13:15:55,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:55,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:55,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:15:55,012 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:55,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 600119202, now seen corresponding path program 1 times [2024-06-14 13:15:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:55,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712962610] [2024-06-14 13:15:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:55,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712962610] [2024-06-14 13:15:55,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712962610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:55,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:55,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:15:55,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650156124] [2024-06-14 13:15:55,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:55,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:15:55,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:55,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:15:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:15:56,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:15:56,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 789 transitions, 12270 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:56,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:56,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:15:56,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:58,100 INFO L124 PetriNetUnfolderBase]: 4617/7112 cut-off events. [2024-06-14 13:15:58,101 INFO L125 PetriNetUnfolderBase]: For 824978/824987 co-relation queries the response was YES. [2024-06-14 13:15:58,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64969 conditions, 7112 events. 4617/7112 cut-off events. For 824978/824987 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42566 event pairs, 778 based on Foata normal form. 8/7115 useless extension candidates. Maximal degree in co-relation 64740. Up to 6815 conditions per place. [2024-06-14 13:15:58,238 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 751 selfloop transitions, 52 changer transitions 0/807 dead transitions. [2024-06-14 13:15:58,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 807 transitions, 14109 flow [2024-06-14 13:15:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:15:58,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 13:15:58,239 INFO L175 Difference]: Start difference. First operand has 524 places, 789 transitions, 12270 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:15:58,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 807 transitions, 14109 flow [2024-06-14 13:16:03,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 807 transitions, 13977 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:03,336 INFO L231 Difference]: Finished difference. Result has 525 places, 792 transitions, 12378 flow [2024-06-14 13:16:03,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12138, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12378, PETRI_PLACES=525, PETRI_TRANSITIONS=792} [2024-06-14 13:16:03,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-14 13:16:03,337 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 792 transitions, 12378 flow [2024-06-14 13:16:03,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:03,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:03,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:16:03,337 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:03,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash 600119450, now seen corresponding path program 3 times [2024-06-14 13:16:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821591392] [2024-06-14 13:16:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:04,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:04,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821591392] [2024-06-14 13:16:04,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821591392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:04,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:04,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196326273] [2024-06-14 13:16:04,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:04,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:04,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 792 transitions, 12378 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:04,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:04,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:04,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:06,489 INFO L124 PetriNetUnfolderBase]: 4661/7186 cut-off events. [2024-06-14 13:16:06,489 INFO L125 PetriNetUnfolderBase]: For 905781/905790 co-relation queries the response was YES. [2024-06-14 13:16:06,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66039 conditions, 7186 events. 4661/7186 cut-off events. For 905781/905790 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43148 event pairs, 788 based on Foata normal form. 18/7199 useless extension candidates. Maximal degree in co-relation 65809. Up to 6852 conditions per place. [2024-06-14 13:16:06,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 763 selfloop transitions, 45 changer transitions 0/812 dead transitions. [2024-06-14 13:16:06,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 812 transitions, 14233 flow [2024-06-14 13:16:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:16:06,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:16:06,842 INFO L175 Difference]: Start difference. First operand has 525 places, 792 transitions, 12378 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:16:06,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 812 transitions, 14233 flow [2024-06-14 13:16:12,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 812 transitions, 14063 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:12,363 INFO L231 Difference]: Finished difference. Result has 526 places, 793 transitions, 12347 flow [2024-06-14 13:16:12,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12208, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12347, PETRI_PLACES=526, PETRI_TRANSITIONS=793} [2024-06-14 13:16:12,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-14 13:16:12,363 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 793 transitions, 12347 flow [2024-06-14 13:16:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:12,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:12,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:12,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:16:12,364 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:12,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 363937146, now seen corresponding path program 5 times [2024-06-14 13:16:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:12,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587986850] [2024-06-14 13:16:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:12,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:13,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587986850] [2024-06-14 13:16:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587986850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:13,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140222638] [2024-06-14 13:16:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:13,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:13,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:13,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 793 transitions, 12347 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:13,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:13,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:13,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:15,706 INFO L124 PetriNetUnfolderBase]: 4681/7213 cut-off events. [2024-06-14 13:16:15,706 INFO L125 PetriNetUnfolderBase]: For 858067/858076 co-relation queries the response was YES. [2024-06-14 13:16:15,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66327 conditions, 7213 events. 4681/7213 cut-off events. For 858067/858076 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43266 event pairs, 780 based on Foata normal form. 10/7218 useless extension candidates. Maximal degree in co-relation 66097. Up to 6745 conditions per place. [2024-06-14 13:16:15,834 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 731 selfloop transitions, 89 changer transitions 0/824 dead transitions. [2024-06-14 13:16:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 824 transitions, 14329 flow [2024-06-14 13:16:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:16:15,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:16:15,835 INFO L175 Difference]: Start difference. First operand has 526 places, 793 transitions, 12347 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:16:15,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 824 transitions, 14329 flow [2024-06-14 13:16:20,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 824 transitions, 14238 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:20,460 INFO L231 Difference]: Finished difference. Result has 530 places, 797 transitions, 12561 flow [2024-06-14 13:16:20,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12256, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12561, PETRI_PLACES=530, PETRI_TRANSITIONS=797} [2024-06-14 13:16:20,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-14 13:16:20,461 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 797 transitions, 12561 flow [2024-06-14 13:16:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:20,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:20,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:16:20,461 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 600416120, now seen corresponding path program 4 times [2024-06-14 13:16:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374250868] [2024-06-14 13:16:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374250868] [2024-06-14 13:16:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374250868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:21,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:21,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:21,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898424393] [2024-06-14 13:16:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:21,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:21,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 797 transitions, 12561 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:21,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:21,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:21,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:23,580 INFO L124 PetriNetUnfolderBase]: 4709/7254 cut-off events. [2024-06-14 13:16:23,580 INFO L125 PetriNetUnfolderBase]: For 896272/896281 co-relation queries the response was YES. [2024-06-14 13:16:23,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67015 conditions, 7254 events. 4709/7254 cut-off events. For 896272/896281 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 43510 event pairs, 806 based on Foata normal form. 14/7263 useless extension candidates. Maximal degree in co-relation 66784. Up to 6971 conditions per place. [2024-06-14 13:16:23,725 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 777 selfloop transitions, 35 changer transitions 0/816 dead transitions. [2024-06-14 13:16:23,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 816 transitions, 14381 flow [2024-06-14 13:16:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:16:23,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 13:16:23,737 INFO L175 Difference]: Start difference. First operand has 530 places, 797 transitions, 12561 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:16:23,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 816 transitions, 14381 flow [2024-06-14 13:16:29,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 816 transitions, 14132 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:29,732 INFO L231 Difference]: Finished difference. Result has 531 places, 800 transitions, 12478 flow [2024-06-14 13:16:29,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12312, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12478, PETRI_PLACES=531, PETRI_TRANSITIONS=800} [2024-06-14 13:16:29,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-14 13:16:29,733 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 800 transitions, 12478 flow [2024-06-14 13:16:29,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:29,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:29,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:29,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:16:29,734 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:29,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash 591838296, now seen corresponding path program 6 times [2024-06-14 13:16:29,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:29,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300182530] [2024-06-14 13:16:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:30,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:30,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300182530] [2024-06-14 13:16:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300182530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:30,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41284446] [2024-06-14 13:16:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:30,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:30,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:30,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 800 transitions, 12478 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:30,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:30,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:30,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:32,885 INFO L124 PetriNetUnfolderBase]: 4729/7284 cut-off events. [2024-06-14 13:16:32,886 INFO L125 PetriNetUnfolderBase]: For 889481/889490 co-relation queries the response was YES. [2024-06-14 13:16:33,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67437 conditions, 7284 events. 4729/7284 cut-off events. For 889481/889490 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 43808 event pairs, 798 based on Foata normal form. 10/7289 useless extension candidates. Maximal degree in co-relation 67204. Up to 6985 conditions per place. [2024-06-14 13:16:33,033 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 774 selfloop transitions, 43 changer transitions 0/821 dead transitions. [2024-06-14 13:16:33,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 821 transitions, 14367 flow [2024-06-14 13:16:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:16:33,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:16:33,034 INFO L175 Difference]: Start difference. First operand has 531 places, 800 transitions, 12478 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:16:33,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 821 transitions, 14367 flow [2024-06-14 13:16:38,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 821 transitions, 14258 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:38,637 INFO L231 Difference]: Finished difference. Result has 535 places, 804 transitions, 12590 flow [2024-06-14 13:16:38,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12369, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12590, PETRI_PLACES=535, PETRI_TRANSITIONS=804} [2024-06-14 13:16:38,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-14 13:16:38,637 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 804 transitions, 12590 flow [2024-06-14 13:16:38,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:38,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:38,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:38,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:16:38,638 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:38,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 363759144, now seen corresponding path program 6 times [2024-06-14 13:16:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:38,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616190478] [2024-06-14 13:16:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:39,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616190478] [2024-06-14 13:16:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616190478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:39,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428505393] [2024-06-14 13:16:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:39,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 804 transitions, 12590 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:39,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:39,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:39,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:42,039 INFO L124 PetriNetUnfolderBase]: 4726/7281 cut-off events. [2024-06-14 13:16:42,040 INFO L125 PetriNetUnfolderBase]: For 874530/874539 co-relation queries the response was YES. [2024-06-14 13:16:42,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67291 conditions, 7281 events. 4726/7281 cut-off events. For 874530/874539 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43771 event pairs, 820 based on Foata normal form. 7/7283 useless extension candidates. Maximal degree in co-relation 67057. Up to 6769 conditions per place. [2024-06-14 13:16:42,191 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 704 selfloop transitions, 120 changer transitions 0/828 dead transitions. [2024-06-14 13:16:42,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 828 transitions, 14321 flow [2024-06-14 13:16:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:16:42,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 13:16:42,192 INFO L175 Difference]: Start difference. First operand has 535 places, 804 transitions, 12590 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:16:42,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 828 transitions, 14321 flow [2024-06-14 13:16:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 828 transitions, 14114 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:48,228 INFO L231 Difference]: Finished difference. Result has 537 places, 804 transitions, 12635 flow [2024-06-14 13:16:48,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12383, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12635, PETRI_PLACES=537, PETRI_TRANSITIONS=804} [2024-06-14 13:16:48,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-14 13:16:48,229 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 804 transitions, 12635 flow [2024-06-14 13:16:48,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:48,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:48,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:16:48,229 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:48,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash -544431906, now seen corresponding path program 7 times [2024-06-14 13:16:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:48,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418303446] [2024-06-14 13:16:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:48,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418303446] [2024-06-14 13:16:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418303446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231712553] [2024-06-14 13:16:49,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:49,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:49,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:49,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 804 transitions, 12635 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:49,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:49,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:49,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:51,697 INFO L124 PetriNetUnfolderBase]: 4714/7273 cut-off events. [2024-06-14 13:16:51,697 INFO L125 PetriNetUnfolderBase]: For 879366/879375 co-relation queries the response was YES. [2024-06-14 13:16:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66742 conditions, 7273 events. 4714/7273 cut-off events. For 879366/879375 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43823 event pairs, 778 based on Foata normal form. 10/7278 useless extension candidates. Maximal degree in co-relation 66507. Up to 6696 conditions per place. [2024-06-14 13:16:51,826 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 709 selfloop transitions, 128 changer transitions 0/841 dead transitions. [2024-06-14 13:16:51,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 841 transitions, 14616 flow [2024-06-14 13:16:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:16:51,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-14 13:16:51,827 INFO L175 Difference]: Start difference. First operand has 537 places, 804 transitions, 12635 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:16:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 841 transitions, 14616 flow [2024-06-14 13:16:57,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 841 transitions, 14179 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:57,270 INFO L231 Difference]: Finished difference. Result has 540 places, 806 transitions, 12551 flow [2024-06-14 13:16:57,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12551, PETRI_PLACES=540, PETRI_TRANSITIONS=806} [2024-06-14 13:16:57,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-14 13:16:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 806 transitions, 12551 flow [2024-06-14 13:16:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:57,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:57,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:16:57,271 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:57,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash -721661858, now seen corresponding path program 8 times [2024-06-14 13:16:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850049057] [2024-06-14 13:16:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:58,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850049057] [2024-06-14 13:16:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850049057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:16:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156384792] [2024-06-14 13:16:58,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:58,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:16:58,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:16:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:16:58,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:16:58,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 806 transitions, 12551 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:58,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:58,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:16:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:00,580 INFO L124 PetriNetUnfolderBase]: 4771/7347 cut-off events. [2024-06-14 13:17:00,580 INFO L125 PetriNetUnfolderBase]: For 894153/894162 co-relation queries the response was YES. [2024-06-14 13:17:00,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67955 conditions, 7347 events. 4771/7347 cut-off events. For 894153/894162 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 44164 event pairs, 829 based on Foata normal form. 8/7350 useless extension candidates. Maximal degree in co-relation 67718. Up to 6907 conditions per place. [2024-06-14 13:17:00,717 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 759 selfloop transitions, 108 changer transitions 0/871 dead transitions. [2024-06-14 13:17:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 871 transitions, 15222 flow [2024-06-14 13:17:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:17:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:17:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:17:00,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-14 13:17:00,718 INFO L175 Difference]: Start difference. First operand has 540 places, 806 transitions, 12551 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:17:00,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 871 transitions, 15222 flow [2024-06-14 13:17:06,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 871 transitions, 14865 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:06,488 INFO L231 Difference]: Finished difference. Result has 545 places, 837 transitions, 13028 flow [2024-06-14 13:17:06,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12198, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13028, PETRI_PLACES=545, PETRI_TRANSITIONS=837} [2024-06-14 13:17:06,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-14 13:17:06,489 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 837 transitions, 13028 flow [2024-06-14 13:17:06,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:06,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:17:06,490 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:06,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1360080640, now seen corresponding path program 9 times [2024-06-14 13:17:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:06,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227356841] [2024-06-14 13:17:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227356841] [2024-06-14 13:17:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227356841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:07,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:07,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364454010] [2024-06-14 13:17:07,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:07,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 837 transitions, 13028 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:07,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:07,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:10,083 INFO L124 PetriNetUnfolderBase]: 4950/7604 cut-off events. [2024-06-14 13:17:10,083 INFO L125 PetriNetUnfolderBase]: For 962851/962860 co-relation queries the response was YES. [2024-06-14 13:17:10,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 7604 events. 4950/7604 cut-off events. For 962851/962860 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45788 event pairs, 833 based on Foata normal form. 12/7611 useless extension candidates. Maximal degree in co-relation 71016. Up to 6735 conditions per place. [2024-06-14 13:17:10,257 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 617 selfloop transitions, 315 changer transitions 0/936 dead transitions. [2024-06-14 13:17:10,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 936 transitions, 16438 flow [2024-06-14 13:17:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:17:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:17:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2024-06-14 13:17:10,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42964352720450283 [2024-06-14 13:17:10,258 INFO L175 Difference]: Start difference. First operand has 545 places, 837 transitions, 13028 flow. Second operand 13 states and 229 transitions. [2024-06-14 13:17:10,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 936 transitions, 16438 flow [2024-06-14 13:17:16,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 936 transitions, 16150 flow, removed 109 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:16,462 INFO L231 Difference]: Finished difference. Result has 557 places, 896 transitions, 14635 flow [2024-06-14 13:17:16,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12799, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14635, PETRI_PLACES=557, PETRI_TRANSITIONS=896} [2024-06-14 13:17:16,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-14 13:17:16,463 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 896 transitions, 14635 flow [2024-06-14 13:17:16,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:16,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:16,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:16,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 13:17:16,463 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:16,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash -691334912, now seen corresponding path program 10 times [2024-06-14 13:17:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:16,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645913970] [2024-06-14 13:17:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:16,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:17,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645913970] [2024-06-14 13:17:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645913970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:17,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159383410] [2024-06-14 13:17:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:17,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:17,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:17,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 896 transitions, 14635 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:20,379 INFO L124 PetriNetUnfolderBase]: 5002/7675 cut-off events. [2024-06-14 13:17:20,379 INFO L125 PetriNetUnfolderBase]: For 1003650/1003652 co-relation queries the response was YES. [2024-06-14 13:17:20,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74130 conditions, 7675 events. 5002/7675 cut-off events. For 1003650/1003652 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46164 event pairs, 827 based on Foata normal form. 4/7670 useless extension candidates. Maximal degree in co-relation 73886. Up to 6598 conditions per place. [2024-06-14 13:17:20,525 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 658 selfloop transitions, 286 changer transitions 0/948 dead transitions. [2024-06-14 13:17:20,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 948 transitions, 17374 flow [2024-06-14 13:17:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:17:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:17:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 243 transitions. [2024-06-14 13:17:20,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42334494773519166 [2024-06-14 13:17:20,526 INFO L175 Difference]: Start difference. First operand has 557 places, 896 transitions, 14635 flow. Second operand 14 states and 243 transitions. [2024-06-14 13:17:20,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 948 transitions, 17374 flow [2024-06-14 13:17:26,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 948 transitions, 16647 flow, removed 186 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:26,599 INFO L231 Difference]: Finished difference. Result has 564 places, 904 transitions, 14825 flow [2024-06-14 13:17:26,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13928, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14825, PETRI_PLACES=564, PETRI_TRANSITIONS=904} [2024-06-14 13:17:26,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-14 13:17:26,599 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 904 transitions, 14825 flow [2024-06-14 13:17:26,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:26,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:26,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 13:17:26,600 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:26,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1284995324, now seen corresponding path program 5 times [2024-06-14 13:17:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:26,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434177307] [2024-06-14 13:17:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434177307] [2024-06-14 13:17:27,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434177307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:27,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:27,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:27,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640697573] [2024-06-14 13:17:27,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:27,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:27,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:27,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:27,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:27,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 904 transitions, 14825 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:27,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:27,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:30,424 INFO L124 PetriNetUnfolderBase]: 5046/7743 cut-off events. [2024-06-14 13:17:30,424 INFO L125 PetriNetUnfolderBase]: For 1067661/1067663 co-relation queries the response was YES. [2024-06-14 13:17:30,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75341 conditions, 7743 events. 5046/7743 cut-off events. For 1067661/1067663 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46667 event pairs, 835 based on Foata normal form. 12/7746 useless extension candidates. Maximal degree in co-relation 75095. Up to 7218 conditions per place. [2024-06-14 13:17:30,585 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 842 selfloop transitions, 91 changer transitions 0/937 dead transitions. [2024-06-14 13:17:30,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 937 transitions, 17062 flow [2024-06-14 13:17:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:17:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-14 13:17:30,586 INFO L175 Difference]: Start difference. First operand has 564 places, 904 transitions, 14825 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:17:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 937 transitions, 17062 flow [2024-06-14 13:17:35,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 937 transitions, 16496 flow, removed 129 selfloop flow, removed 13 redundant places. [2024-06-14 13:17:35,845 INFO L231 Difference]: Finished difference. Result has 561 places, 905 transitions, 14486 flow [2024-06-14 13:17:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14259, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14486, PETRI_PLACES=561, PETRI_TRANSITIONS=905} [2024-06-14 13:17:35,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-14 13:17:35,846 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 905 transitions, 14486 flow [2024-06-14 13:17:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:35,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:35,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 13:17:35,846 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:35,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1284988380, now seen corresponding path program 11 times [2024-06-14 13:17:35,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235774962] [2024-06-14 13:17:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:35,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:36,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:36,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235774962] [2024-06-14 13:17:36,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235774962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:36,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:36,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376491563] [2024-06-14 13:17:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:36,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:37,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:37,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 905 transitions, 14486 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:37,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:37,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:37,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:39,908 INFO L124 PetriNetUnfolderBase]: 5056/7772 cut-off events. [2024-06-14 13:17:39,908 INFO L125 PetriNetUnfolderBase]: For 966790/966799 co-relation queries the response was YES. [2024-06-14 13:17:40,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 7772 events. 5056/7772 cut-off events. For 966790/966799 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 47081 event pairs, 839 based on Foata normal form. 8/7775 useless extension candidates. Maximal degree in co-relation 74579. Up to 7429 conditions per place. [2024-06-14 13:17:40,159 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 886 selfloop transitions, 65 changer transitions 0/955 dead transitions. [2024-06-14 13:17:40,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 955 transitions, 16877 flow [2024-06-14 13:17:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:17:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:17:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-14 13:17:40,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38649155722326456 [2024-06-14 13:17:40,160 INFO L175 Difference]: Start difference. First operand has 561 places, 905 transitions, 14486 flow. Second operand 13 states and 206 transitions. [2024-06-14 13:17:40,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 955 transitions, 16877 flow [2024-06-14 13:17:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 955 transitions, 16642 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:46,185 INFO L231 Difference]: Finished difference. Result has 570 places, 927 transitions, 14796 flow [2024-06-14 13:17:46,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14262, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14796, PETRI_PLACES=570, PETRI_TRANSITIONS=927} [2024-06-14 13:17:46,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 528 predicate places. [2024-06-14 13:17:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 927 transitions, 14796 flow [2024-06-14 13:17:46,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:46,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:46,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 13:17:46,186 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:46,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash 852656092, now seen corresponding path program 12 times [2024-06-14 13:17:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115863328] [2024-06-14 13:17:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:47,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:47,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115863328] [2024-06-14 13:17:47,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115863328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:47,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:47,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959527137] [2024-06-14 13:17:47,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:47,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:47,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:47,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:47,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 927 transitions, 14796 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:47,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:47,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:47,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:50,115 INFO L124 PetriNetUnfolderBase]: 5164/7911 cut-off events. [2024-06-14 13:17:50,116 INFO L125 PetriNetUnfolderBase]: For 1079199/1079208 co-relation queries the response was YES. [2024-06-14 13:17:50,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77986 conditions, 7911 events. 5164/7911 cut-off events. For 1079199/1079208 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 47667 event pairs, 683 based on Foata normal form. 10/7916 useless extension candidates. Maximal degree in co-relation 77737. Up to 5885 conditions per place. [2024-06-14 13:17:50,369 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 484 selfloop transitions, 497 changer transitions 0/985 dead transitions. [2024-06-14 13:17:50,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 985 transitions, 18117 flow [2024-06-14 13:17:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:17:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:17:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 233 transitions. [2024-06-14 13:17:50,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371482176360225 [2024-06-14 13:17:50,372 INFO L175 Difference]: Start difference. First operand has 570 places, 927 transitions, 14796 flow. Second operand 13 states and 233 transitions. [2024-06-14 13:17:50,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 985 transitions, 18117 flow [2024-06-14 13:17:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 985 transitions, 17866 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-14 13:17:56,621 INFO L231 Difference]: Finished difference. Result has 580 places, 945 transitions, 16276 flow [2024-06-14 13:17:56,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14545, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16276, PETRI_PLACES=580, PETRI_TRANSITIONS=945} [2024-06-14 13:17:56,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 538 predicate places. [2024-06-14 13:17:56,622 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 945 transitions, 16276 flow [2024-06-14 13:17:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:56,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:56,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 13:17:56,622 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:56,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1284815400, now seen corresponding path program 13 times [2024-06-14 13:17:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:56,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238003136] [2024-06-14 13:17:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:57,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238003136] [2024-06-14 13:17:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238003136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:57,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:17:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626457163] [2024-06-14 13:17:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:57,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:17:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:17:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:17:57,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:17:57,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 945 transitions, 16276 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:57,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:57,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:17:57,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:00,835 INFO L124 PetriNetUnfolderBase]: 5174/7931 cut-off events. [2024-06-14 13:18:00,835 INFO L125 PetriNetUnfolderBase]: For 1097406/1097415 co-relation queries the response was YES. [2024-06-14 13:18:00,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80989 conditions, 7931 events. 5174/7931 cut-off events. For 1097406/1097415 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 47905 event pairs, 857 based on Foata normal form. 8/7934 useless extension candidates. Maximal degree in co-relation 80737. Up to 7592 conditions per place. [2024-06-14 13:18:00,986 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 906 selfloop transitions, 65 changer transitions 0/975 dead transitions. [2024-06-14 13:18:00,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 975 transitions, 18429 flow [2024-06-14 13:18:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:18:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:18:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-14 13:18:00,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 13:18:00,987 INFO L175 Difference]: Start difference. First operand has 580 places, 945 transitions, 16276 flow. Second operand 12 states and 194 transitions. [2024-06-14 13:18:00,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 975 transitions, 18429 flow [2024-06-14 13:18:08,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 975 transitions, 17769 flow, removed 110 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:08,608 INFO L231 Difference]: Finished difference. Result has 584 places, 948 transitions, 15838 flow [2024-06-14 13:18:08,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15616, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15838, PETRI_PLACES=584, PETRI_TRANSITIONS=948} [2024-06-14 13:18:08,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-14 13:18:08,608 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 948 transitions, 15838 flow [2024-06-14 13:18:08,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:08,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:08,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:08,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 13:18:08,609 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:08,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:08,609 INFO L85 PathProgramCache]: Analyzing trace with hash -478726052, now seen corresponding path program 14 times [2024-06-14 13:18:08,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:08,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924211008] [2024-06-14 13:18:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:08,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924211008] [2024-06-14 13:18:09,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924211008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:09,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:09,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637979767] [2024-06-14 13:18:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:09,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:09,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:18:09,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 948 transitions, 15838 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:09,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:09,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:18:09,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:13,029 INFO L124 PetriNetUnfolderBase]: 5220/8001 cut-off events. [2024-06-14 13:18:13,030 INFO L125 PetriNetUnfolderBase]: For 1136309/1136318 co-relation queries the response was YES. [2024-06-14 13:18:13,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81629 conditions, 8001 events. 5220/8001 cut-off events. For 1136309/1136318 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 48389 event pairs, 857 based on Foata normal form. 10/8006 useless extension candidates. Maximal degree in co-relation 81375. Up to 7516 conditions per place. [2024-06-14 13:18:13,181 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 877 selfloop transitions, 110 changer transitions 0/991 dead transitions. [2024-06-14 13:18:13,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 991 transitions, 18535 flow [2024-06-14 13:18:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:18:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:18:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-14 13:18:13,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41088180112570355 [2024-06-14 13:18:13,182 INFO L175 Difference]: Start difference. First operand has 584 places, 948 transitions, 15838 flow. Second operand 13 states and 219 transitions. [2024-06-14 13:18:13,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 991 transitions, 18535 flow [2024-06-14 13:18:20,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 991 transitions, 18364 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-14 13:18:20,287 INFO L231 Difference]: Finished difference. Result has 589 places, 961 transitions, 16271 flow [2024-06-14 13:18:20,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15667, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=841, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16271, PETRI_PLACES=589, PETRI_TRANSITIONS=961} [2024-06-14 13:18:20,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2024-06-14 13:18:20,288 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 961 transitions, 16271 flow [2024-06-14 13:18:20,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:20,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:20,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:20,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 13:18:20,288 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:20,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:20,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1005817600, now seen corresponding path program 15 times [2024-06-14 13:18:20,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:20,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334277921] [2024-06-14 13:18:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:20,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:21,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:21,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334277921] [2024-06-14 13:18:21,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334277921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:21,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:21,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978493033] [2024-06-14 13:18:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:21,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:18:21,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 961 transitions, 16271 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:21,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:21,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:18:21,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:24,670 INFO L124 PetriNetUnfolderBase]: 5202/7979 cut-off events. [2024-06-14 13:18:24,670 INFO L125 PetriNetUnfolderBase]: For 1115866/1115875 co-relation queries the response was YES. [2024-06-14 13:18:24,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80587 conditions, 7979 events. 5202/7979 cut-off events. For 1115866/1115875 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 48316 event pairs, 873 based on Foata normal form. 12/7986 useless extension candidates. Maximal degree in co-relation 80331. Up to 7199 conditions per place. [2024-06-14 13:18:24,839 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 677 selfloop transitions, 309 changer transitions 0/990 dead transitions. [2024-06-14 13:18:24,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 990 transitions, 18371 flow [2024-06-14 13:18:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:18:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:18:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 13:18:24,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 13:18:24,840 INFO L175 Difference]: Start difference. First operand has 589 places, 961 transitions, 16271 flow. Second operand 12 states and 206 transitions. [2024-06-14 13:18:24,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 990 transitions, 18371 flow [2024-06-14 13:18:32,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 990 transitions, 18167 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-14 13:18:32,170 INFO L231 Difference]: Finished difference. Result has 592 places, 962 transitions, 16717 flow [2024-06-14 13:18:32,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16067, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16717, PETRI_PLACES=592, PETRI_TRANSITIONS=962} [2024-06-14 13:18:32,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-14 13:18:32,177 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 962 transitions, 16717 flow [2024-06-14 13:18:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 13:18:32,177 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:32,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:32,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1629616130, now seen corresponding path program 16 times [2024-06-14 13:18:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636686972] [2024-06-14 13:18:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:33,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:33,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636686972] [2024-06-14 13:18:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636686972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:33,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:33,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:33,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991118801] [2024-06-14 13:18:33,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:33,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:18:33,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 962 transitions, 16717 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:33,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:33,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:18:33,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:36,509 INFO L124 PetriNetUnfolderBase]: 5232/8021 cut-off events. [2024-06-14 13:18:36,510 INFO L125 PetriNetUnfolderBase]: For 1132678/1132687 co-relation queries the response was YES. [2024-06-14 13:18:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81716 conditions, 8021 events. 5232/8021 cut-off events. For 1132678/1132687 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 48560 event pairs, 887 based on Foata normal form. 12/8028 useless extension candidates. Maximal degree in co-relation 81458. Up to 7570 conditions per place. [2024-06-14 13:18:36,669 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 855 selfloop transitions, 131 changer transitions 0/990 dead transitions. [2024-06-14 13:18:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 990 transitions, 18949 flow [2024-06-14 13:18:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:18:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:18:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-14 13:18:36,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057649667405765 [2024-06-14 13:18:36,670 INFO L175 Difference]: Start difference. First operand has 592 places, 962 transitions, 16717 flow. Second operand 11 states and 183 transitions. [2024-06-14 13:18:36,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 990 transitions, 18949 flow [2024-06-14 13:18:44,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 990 transitions, 18276 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-14 13:18:44,954 INFO L231 Difference]: Finished difference. Result has 594 places, 970 transitions, 16518 flow [2024-06-14 13:18:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16044, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16518, PETRI_PLACES=594, PETRI_TRANSITIONS=970} [2024-06-14 13:18:44,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 552 predicate places. [2024-06-14 13:18:44,954 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 970 transitions, 16518 flow [2024-06-14 13:18:44,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:44,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:44,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:44,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 13:18:44,954 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:44,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1624731770, now seen corresponding path program 17 times [2024-06-14 13:18:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713074243] [2024-06-14 13:18:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:45,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713074243] [2024-06-14 13:18:45,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713074243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:45,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:45,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:45,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381132889] [2024-06-14 13:18:45,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:45,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:45,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:46,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:18:46,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 970 transitions, 16518 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:46,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:46,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:18:46,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:49,044 INFO L124 PetriNetUnfolderBase]: 5284/8087 cut-off events. [2024-06-14 13:18:49,045 INFO L125 PetriNetUnfolderBase]: For 1149133/1149142 co-relation queries the response was YES. [2024-06-14 13:18:49,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82720 conditions, 8087 events. 5284/8087 cut-off events. For 1149133/1149142 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 48895 event pairs, 735 based on Foata normal form. 8/8090 useless extension candidates. Maximal degree in co-relation 82461. Up to 7508 conditions per place. [2024-06-14 13:18:49,209 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 893 selfloop transitions, 150 changer transitions 0/1047 dead transitions. [2024-06-14 13:18:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1047 transitions, 19918 flow [2024-06-14 13:18:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:18:49,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-14 13:18:49,210 INFO L175 Difference]: Start difference. First operand has 594 places, 970 transitions, 16518 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:18:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1047 transitions, 19918 flow [2024-06-14 13:18:56,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1047 transitions, 19552 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:56,736 INFO L231 Difference]: Finished difference. Result has 601 places, 1023 transitions, 17640 flow [2024-06-14 13:18:56,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16185, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17640, PETRI_PLACES=601, PETRI_TRANSITIONS=1023} [2024-06-14 13:18:56,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 559 predicate places. [2024-06-14 13:18:56,737 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1023 transitions, 17640 flow [2024-06-14 13:18:56,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:56,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:56,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:56,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 13:18:56,737 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:56,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1624998680, now seen corresponding path program 18 times [2024-06-14 13:18:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737428383] [2024-06-14 13:18:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:57,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737428383] [2024-06-14 13:18:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737428383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:57,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:57,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204832408] [2024-06-14 13:18:57,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:57,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:18:57,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1023 transitions, 17640 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:57,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:57,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:18:57,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:00,915 INFO L124 PetriNetUnfolderBase]: 5288/8103 cut-off events. [2024-06-14 13:19:00,915 INFO L125 PetriNetUnfolderBase]: For 1169399/1169408 co-relation queries the response was YES. [2024-06-14 13:19:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83371 conditions, 8103 events. 5288/8103 cut-off events. For 1169399/1169408 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 49143 event pairs, 730 based on Foata normal form. 10/8108 useless extension candidates. Maximal degree in co-relation 83106. Up to 7321 conditions per place. [2024-06-14 13:19:01,094 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 845 selfloop transitions, 202 changer transitions 0/1051 dead transitions. [2024-06-14 13:19:01,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1051 transitions, 20042 flow [2024-06-14 13:19:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 13:19:01,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-14 13:19:01,095 INFO L175 Difference]: Start difference. First operand has 601 places, 1023 transitions, 17640 flow. Second operand 10 states and 177 transitions. [2024-06-14 13:19:01,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1051 transitions, 20042 flow [2024-06-14 13:19:08,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1051 transitions, 19718 flow, removed 126 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:08,901 INFO L231 Difference]: Finished difference. Result has 608 places, 1026 transitions, 17885 flow [2024-06-14 13:19:08,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17368, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17885, PETRI_PLACES=608, PETRI_TRANSITIONS=1026} [2024-06-14 13:19:08,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 566 predicate places. [2024-06-14 13:19:08,901 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1026 transitions, 17885 flow [2024-06-14 13:19:08,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:08,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:08,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:08,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 13:19:08,902 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:08,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1865606916, now seen corresponding path program 6 times [2024-06-14 13:19:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:08,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646838169] [2024-06-14 13:19:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:09,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646838169] [2024-06-14 13:19:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646838169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:09,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:09,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:09,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661077846] [2024-06-14 13:19:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:09,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:09,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:19:09,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1026 transitions, 17885 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:09,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:09,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:19:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:13,151 INFO L124 PetriNetUnfolderBase]: 5332/8165 cut-off events. [2024-06-14 13:19:13,151 INFO L125 PetriNetUnfolderBase]: For 1244892/1244901 co-relation queries the response was YES. [2024-06-14 13:19:13,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83926 conditions, 8165 events. 5332/8165 cut-off events. For 1244892/1244901 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49552 event pairs, 856 based on Foata normal form. 18/8178 useless extension candidates. Maximal degree in co-relation 83660. Up to 7758 conditions per place. [2024-06-14 13:19:13,331 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 980 selfloop transitions, 66 changer transitions 0/1050 dead transitions. [2024-06-14 13:19:13,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1050 transitions, 20232 flow [2024-06-14 13:19:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:19:13,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:19:13,332 INFO L175 Difference]: Start difference. First operand has 608 places, 1026 transitions, 17885 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:19:13,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1050 transitions, 20232 flow [2024-06-14 13:19:21,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1050 transitions, 19658 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:21,823 INFO L231 Difference]: Finished difference. Result has 609 places, 1027 transitions, 17491 flow [2024-06-14 13:19:21,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17311, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17491, PETRI_PLACES=609, PETRI_TRANSITIONS=1027} [2024-06-14 13:19:21,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 567 predicate places. [2024-06-14 13:19:21,824 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1027 transitions, 17491 flow [2024-06-14 13:19:21,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:21,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:21,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:21,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 13:19:21,824 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:21,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1629200420, now seen corresponding path program 19 times [2024-06-14 13:19:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:21,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112163913] [2024-06-14 13:19:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112163913] [2024-06-14 13:19:22,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112163913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:22,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:22,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437152012] [2024-06-14 13:19:22,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:22,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:22,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:22,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:19:22,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1027 transitions, 17491 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:22,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:22,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:19:22,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:26,458 INFO L124 PetriNetUnfolderBase]: 5454/8339 cut-off events. [2024-06-14 13:19:26,458 INFO L125 PetriNetUnfolderBase]: For 1300365/1300374 co-relation queries the response was YES. [2024-06-14 13:19:26,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87560 conditions, 8339 events. 5454/8339 cut-off events. For 1300365/1300374 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 50604 event pairs, 731 based on Foata normal form. 8/8342 useless extension candidates. Maximal degree in co-relation 87293. Up to 7266 conditions per place. [2024-06-14 13:19:26,630 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 773 selfloop transitions, 299 changer transitions 0/1076 dead transitions. [2024-06-14 13:19:26,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1076 transitions, 20950 flow [2024-06-14 13:19:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:19:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:19:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-14 13:19:26,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:19:26,631 INFO L175 Difference]: Start difference. First operand has 609 places, 1027 transitions, 17491 flow. Second operand 12 states and 212 transitions. [2024-06-14 13:19:26,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1076 transitions, 20950 flow [2024-06-14 13:19:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1076 transitions, 20802 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:35,177 INFO L231 Difference]: Finished difference. Result has 614 places, 1045 transitions, 18591 flow [2024-06-14 13:19:35,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17343, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18591, PETRI_PLACES=614, PETRI_TRANSITIONS=1045} [2024-06-14 13:19:35,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 572 predicate places. [2024-06-14 13:19:35,177 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1045 transitions, 18591 flow [2024-06-14 13:19:35,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:35,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:35,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:35,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 13:19:35,178 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:35,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1865786840, now seen corresponding path program 20 times [2024-06-14 13:19:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:35,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727845449] [2024-06-14 13:19:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:36,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727845449] [2024-06-14 13:19:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727845449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:36,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760976697] [2024-06-14 13:19:36,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:36,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:19:36,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1045 transitions, 18591 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:36,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:36,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:19:36,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:39,810 INFO L124 PetriNetUnfolderBase]: 5458/8339 cut-off events. [2024-06-14 13:19:39,810 INFO L125 PetriNetUnfolderBase]: For 1321014/1321023 co-relation queries the response was YES. [2024-06-14 13:19:39,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88195 conditions, 8339 events. 5458/8339 cut-off events. For 1321014/1321023 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 50577 event pairs, 868 based on Foata normal form. 10/8344 useless extension candidates. Maximal degree in co-relation 87927. Up to 7874 conditions per place. [2024-06-14 13:19:39,983 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 952 selfloop transitions, 120 changer transitions 0/1076 dead transitions. [2024-06-14 13:19:39,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1076 transitions, 21002 flow [2024-06-14 13:19:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:19:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:19:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-06-14 13:19:39,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39547038327526135 [2024-06-14 13:19:39,989 INFO L175 Difference]: Start difference. First operand has 614 places, 1045 transitions, 18591 flow. Second operand 14 states and 227 transitions. [2024-06-14 13:19:39,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1076 transitions, 21002 flow [2024-06-14 13:19:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 1076 transitions, 20595 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:48,087 INFO L231 Difference]: Finished difference. Result has 620 places, 1048 transitions, 18550 flow [2024-06-14 13:19:48,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18192, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18550, PETRI_PLACES=620, PETRI_TRANSITIONS=1048} [2024-06-14 13:19:48,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-14 13:19:48,087 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 1048 transitions, 18550 flow [2024-06-14 13:19:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:48,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:48,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 13:19:48,088 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:48,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1865791490, now seen corresponding path program 21 times [2024-06-14 13:19:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:48,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058433799] [2024-06-14 13:19:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:48,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:49,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058433799] [2024-06-14 13:19:49,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058433799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:49,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:49,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5022265] [2024-06-14 13:19:49,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:49,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:49,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:49,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:49,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:19:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 1048 transitions, 18550 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:49,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:19:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:52,873 INFO L124 PetriNetUnfolderBase]: 5446/8311 cut-off events. [2024-06-14 13:19:52,873 INFO L125 PetriNetUnfolderBase]: For 1283022/1283031 co-relation queries the response was YES. [2024-06-14 13:19:53,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87328 conditions, 8311 events. 5446/8311 cut-off events. For 1283022/1283031 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 50296 event pairs, 860 based on Foata normal form. 10/8316 useless extension candidates. Maximal degree in co-relation 87059. Up to 7816 conditions per place. [2024-06-14 13:19:53,056 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 941 selfloop transitions, 134 changer transitions 0/1079 dead transitions. [2024-06-14 13:19:53,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1079 transitions, 21129 flow [2024-06-14 13:19:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:19:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:19:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 244 transitions. [2024-06-14 13:19:53,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967479674796748 [2024-06-14 13:19:53,058 INFO L175 Difference]: Start difference. First operand has 620 places, 1048 transitions, 18550 flow. Second operand 15 states and 244 transitions. [2024-06-14 13:19:53,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1079 transitions, 21129 flow [2024-06-14 13:20:00,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1079 transitions, 20827 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-14 13:20:00,514 INFO L231 Difference]: Finished difference. Result has 625 places, 1048 transitions, 18532 flow [2024-06-14 13:20:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18248, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1048, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=18532, PETRI_PLACES=625, PETRI_TRANSITIONS=1048} [2024-06-14 13:20:00,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 583 predicate places. [2024-06-14 13:20:00,515 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 1048 transitions, 18532 flow [2024-06-14 13:20:00,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:00,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:00,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:00,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 13:20:00,515 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:20:00,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash 571295454, now seen corresponding path program 22 times [2024-06-14 13:20:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:00,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935656882] [2024-06-14 13:20:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935656882] [2024-06-14 13:20:01,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935656882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:01,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:01,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:20:01,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702681903] [2024-06-14 13:20:01,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:01,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:20:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:20:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:20:01,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:20:01,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1048 transitions, 18532 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:01,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:01,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:20:01,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand