./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/mix052_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix052_pso.opt_rmo.opt_tso.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:26:49,605 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:26:49,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:26:49,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:26:49,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:26:49,663 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:26:49,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:26:49,664 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:26:49,665 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:26:49,665 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:26:49,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:26:49,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:26:49,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:26:49,666 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:26:49,667 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:26:49,667 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:26:49,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:26:49,668 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:26:49,668 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:26:49,668 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:26:49,668 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:26:49,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:26:49,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:26:49,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:26:49,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:26:49,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:26:49,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:26:49,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:26:49,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:26:49,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:26:49,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:26:49,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:26:49,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:26:49,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:26:49,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:26:49,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:26:49,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:26:49,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:26:49,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:26:49,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:26:49,673 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:26:49,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:26:49,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:26:49,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:26:49,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:26:49,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:26:49,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:26:49,906 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:26:49,906 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:26:49,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i [2024-05-12 13:26:51,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:26:51,212 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:26:51,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i [2024-05-12 13:26:51,229 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afce80ba5/1a0d1c1dff9c4708bd04866303db742a/FLAG965fb9c7d [2024-05-12 13:26:51,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afce80ba5/1a0d1c1dff9c4708bd04866303db742a [2024-05-12 13:26:51,244 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:26:51,244 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:26:51,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix052_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-05-12 13:26:51,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:26:51,408 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:26:51,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:26:51,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:26:51,415 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:26:51,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:26:51" (1/2) ... [2024-05-12 13:26:51,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e78650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:26:51, skipping insertion in model container [2024-05-12 13:26:51,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:26:51" (1/2) ... [2024-05-12 13:26:51,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e35c275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:26:51, skipping insertion in model container [2024-05-12 13:26:51,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:26:51" (2/2) ... [2024-05-12 13:26:51,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e78650 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51, skipping insertion in model container [2024-05-12 13:26:51,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:26:51" (2/2) ... [2024-05-12 13:26:51,419 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:26:51,493 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:26:51,494 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-05-12 13:26:51,494 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-05-12 13:26:51,494 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-05-12 13:26:51,494 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:26:51,494 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-05-12 13:26:51,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:26:51,709 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i[964,977] [2024-05-12 13:26:51,850 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:26:51,858 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:26:51,890 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_pso.opt_rmo.opt_tso.opt.i[964,977] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:26:51,957 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:26:51,986 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:26:51,986 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51 WrapperNode [2024-05-12 13:26:51,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:26:51,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:26:51,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:26:51,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:26:51,993 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 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,007 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 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,033 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2024-05-12 13:26:52,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:26:52,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:26:52,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:26:52,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:26:52,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,045 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,059 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 13:26:52,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:26:52,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:26:52,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:26:52,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:26:52,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (1/1) ... [2024-05-12 13:26:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:26:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:26:52,138 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) [2024-05-12 13:26:52,159 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 [2024-05-12 13:26:52,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:26:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:26:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:26:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:26:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:26:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:26:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:26:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:26:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:26:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:26:52,174 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:26:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:26:52,174 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:26:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:26:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:26:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:26:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:26:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:26:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:26:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:26:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:26:52,179 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:26:52,286 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:26:52,288 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:26:52,595 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:26:52,595 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:26:52,746 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:26:52,746 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:26:52,747 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:26:52 BoogieIcfgContainer [2024-05-12 13:26:52,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:26:52,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:26:52,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:26:52,752 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:26:52,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:26:51" (1/4) ... [2024-05-12 13:26:52,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695fb980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:26:52, skipping insertion in model container [2024-05-12 13:26:52,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:26:51" (2/4) ... [2024-05-12 13:26:52,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695fb980 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:26:52, skipping insertion in model container [2024-05-12 13:26:52,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:26:51" (3/4) ... [2024-05-12 13:26:52,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695fb980 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:26:52, skipping insertion in model container [2024-05-12 13:26:52,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:26:52" (4/4) ... [2024-05-12 13:26:52,755 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_pso.opt_rmo.opt_tso.opt.i [2024-05-12 13:26:52,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:26:52,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:26:52,769 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:26:52,813 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:26:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 13:26:52,874 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-05-12 13:26:52,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:26:52,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-05-12 13:26:52,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-05-12 13:26:52,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 44 transitions, 97 flow [2024-05-12 13:26:52,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:26:52,899 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;@46225bb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:26:52,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:26:52,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:26:52,904 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:26:52,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:26:52,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:52,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:26:52,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:52,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2115248909, now seen corresponding path program 1 times [2024-05-12 13:26:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:52,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785312700] [2024-05-12 13:26:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:53,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:53,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785312700] [2024-05-12 13:26:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785312700] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:53,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:26:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052846789] [2024-05-12 13:26:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:53,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:26:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:26:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:26:53,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 47 [2024-05-12 13:26:53,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:53,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:53,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 47 [2024-05-12 13:26:53,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:54,517 INFO L124 PetriNetUnfolderBase]: 2575/4448 cut-off events. [2024-05-12 13:26:54,518 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 13:26:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8260 conditions, 4448 events. 2575/4448 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29195 event pairs, 2072 based on Foata normal form. 151/4222 useless extension candidates. Maximal degree in co-relation 8245. Up to 3731 conditions per place. [2024-05-12 13:26:54,544 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 41 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-05-12 13:26:54,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 223 flow [2024-05-12 13:26:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:26:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:26:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-05-12 13:26:54,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-05-12 13:26:54,556 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 97 flow. Second operand 3 states and 96 transitions. [2024-05-12 13:26:54,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 223 flow [2024-05-12 13:26:54,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 218 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:26:54,564 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 129 flow [2024-05-12 13:26:54,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-05-12 13:26:54,569 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-05-12 13:26:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 129 flow [2024-05-12 13:26:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:54,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:54,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:54,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:26:54,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:54,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1234705324, now seen corresponding path program 1 times [2024-05-12 13:26:54,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311366703] [2024-05-12 13:26:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:54,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:55,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311366703] [2024-05-12 13:26:55,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311366703] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:55,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:55,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:26:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414621952] [2024-05-12 13:26:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:55,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:26:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:26:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:26:55,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:26:55,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:26:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:55,611 INFO L124 PetriNetUnfolderBase]: 2998/4406 cut-off events. [2024-05-12 13:26:55,611 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2024-05-12 13:26:55,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9918 conditions, 4406 events. 2998/4406 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24103 event pairs, 1452 based on Foata normal form. 3/4227 useless extension candidates. Maximal degree in co-relation 9903. Up to 4303 conditions per place. [2024-05-12 13:26:55,632 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 53 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-05-12 13:26:55,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 319 flow [2024-05-12 13:26:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:26:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:26:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-05-12 13:26:55,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436170212765957 [2024-05-12 13:26:55,637 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 129 flow. Second operand 4 states and 121 transitions. [2024-05-12 13:26:55,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 319 flow [2024-05-12 13:26:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:26:55,641 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 175 flow [2024-05-12 13:26:55,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-05-12 13:26:55,642 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2024-05-12 13:26:55,642 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 175 flow [2024-05-12 13:26:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:55,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:55,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:26:55,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:55,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash -378839472, now seen corresponding path program 1 times [2024-05-12 13:26:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:55,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401179003] [2024-05-12 13:26:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:55,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:56,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401179003] [2024-05-12 13:26:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401179003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:56,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:56,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:26:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936852062] [2024-05-12 13:26:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:26:56,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:26:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:26:56,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:26:56,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:56,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:56,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:26:56,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:56,735 INFO L124 PetriNetUnfolderBase]: 3057/4518 cut-off events. [2024-05-12 13:26:56,735 INFO L125 PetriNetUnfolderBase]: For 1732/1732 co-relation queries the response was YES. [2024-05-12 13:26:56,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 4518 events. 3057/4518 cut-off events. For 1732/1732 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24576 event pairs, 871 based on Foata normal form. 7/4327 useless extension candidates. Maximal degree in co-relation 11223. Up to 4167 conditions per place. [2024-05-12 13:26:56,755 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 73 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-05-12 13:26:56,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 531 flow [2024-05-12 13:26:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:26:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:26:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-05-12 13:26:56,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851063829787234 [2024-05-12 13:26:56,758 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 175 flow. Second operand 5 states and 161 transitions. [2024-05-12 13:26:56,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 531 flow [2024-05-12 13:26:56,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 105 transitions, 512 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:26:56,761 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 304 flow [2024-05-12 13:26:56,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-05-12 13:26:56,761 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-05-12 13:26:56,762 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 304 flow [2024-05-12 13:26:56,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:56,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:56,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:56,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:26:56,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:56,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1007525327, now seen corresponding path program 1 times [2024-05-12 13:26:56,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:56,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930744621] [2024-05-12 13:26:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:57,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:57,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930744621] [2024-05-12 13:26:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930744621] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:57,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:57,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:26:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659284891] [2024-05-12 13:26:57,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:26:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:26:57,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:26:57,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:26:57,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 304 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:57,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:57,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:26:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:58,032 INFO L124 PetriNetUnfolderBase]: 3299/4864 cut-off events. [2024-05-12 13:26:58,032 INFO L125 PetriNetUnfolderBase]: For 4683/4683 co-relation queries the response was YES. [2024-05-12 13:26:58,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14532 conditions, 4864 events. 3299/4864 cut-off events. For 4683/4683 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26639 event pairs, 544 based on Foata normal form. 26/4624 useless extension candidates. Maximal degree in co-relation 14512. Up to 4211 conditions per place. [2024-05-12 13:26:58,059 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 85 selfloop transitions, 24 changer transitions 0/120 dead transitions. [2024-05-12 13:26:58,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 120 transitions, 686 flow [2024-05-12 13:26:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:26:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:26:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-05-12 13:26:58,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6737588652482269 [2024-05-12 13:26:58,061 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 304 flow. Second operand 6 states and 190 transitions. [2024-05-12 13:26:58,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 120 transitions, 686 flow [2024-05-12 13:26:58,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 120 transitions, 674 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 13:26:58,066 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 371 flow [2024-05-12 13:26:58,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-05-12 13:26:58,067 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-05-12 13:26:58,067 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 371 flow [2024-05-12 13:26:58,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:58,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:58,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:58,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:26:58,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:58,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 338095028, now seen corresponding path program 1 times [2024-05-12 13:26:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:58,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43258419] [2024-05-12 13:26:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:58,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43258419] [2024-05-12 13:26:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43258419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:58,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:26:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485802477] [2024-05-12 13:26:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:58,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:26:58,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:26:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:26:58,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:26:58,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 371 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-05-12 13:26:58,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:58,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:26:58,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:59,188 INFO L124 PetriNetUnfolderBase]: 3263/4999 cut-off events. [2024-05-12 13:26:59,188 INFO L125 PetriNetUnfolderBase]: For 6603/6603 co-relation queries the response was YES. [2024-05-12 13:26:59,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15955 conditions, 4999 events. 3263/4999 cut-off events. For 6603/6603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28478 event pairs, 885 based on Foata normal form. 4/4712 useless extension candidates. Maximal degree in co-relation 15932. Up to 4658 conditions per place. [2024-05-12 13:26:59,216 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 68 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-05-12 13:26:59,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 577 flow [2024-05-12 13:26:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:26:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:26:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-05-12 13:26:59,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2024-05-12 13:26:59,218 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 371 flow. Second operand 5 states and 133 transitions. [2024-05-12 13:26:59,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 577 flow [2024-05-12 13:26:59,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 516 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:26:59,226 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 339 flow [2024-05-12 13:26:59,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-05-12 13:26:59,226 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-05-12 13:26:59,227 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 339 flow [2024-05-12 13:26:59,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-05-12 13:26:59,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:59,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:26:59,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:59,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1870941109, now seen corresponding path program 1 times [2024-05-12 13:26:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047345693] [2024-05-12 13:26:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:26:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:26:59,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:26:59,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047345693] [2024-05-12 13:26:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047345693] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:26:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:26:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:26:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449938909] [2024-05-12 13:26:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:26:59,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:26:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:26:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:26:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:26:59,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2024-05-12 13:26:59,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:59,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:26:59,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2024-05-12 13:26:59,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:26:59,512 INFO L124 PetriNetUnfolderBase]: 1042/2127 cut-off events. [2024-05-12 13:26:59,513 INFO L125 PetriNetUnfolderBase]: For 2377/2593 co-relation queries the response was YES. [2024-05-12 13:26:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5152 conditions, 2127 events. 1042/2127 cut-off events. For 2377/2593 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15556 event pairs, 225 based on Foata normal form. 3/1967 useless extension candidates. Maximal degree in co-relation 5127. Up to 1140 conditions per place. [2024-05-12 13:26:59,530 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 27 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-05-12 13:26:59,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 369 flow [2024-05-12 13:26:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:26:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:26:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-05-12 13:26:59,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2024-05-12 13:26:59,531 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 339 flow. Second operand 3 states and 102 transitions. [2024-05-12 13:26:59,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 369 flow [2024-05-12 13:26:59,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 347 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 13:26:59,536 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 277 flow [2024-05-12 13:26:59,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-05-12 13:26:59,537 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2024-05-12 13:26:59,537 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 277 flow [2024-05-12 13:26:59,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:26:59,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:26:59,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:26:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:26:59,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:26:59,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:26:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2138274989, now seen corresponding path program 1 times [2024-05-12 13:26:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:26:59,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966535322] [2024-05-12 13:26:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:26:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:26:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:00,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:00,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966535322] [2024-05-12 13:27:00,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966535322] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:00,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:00,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:00,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130241821] [2024-05-12 13:27:00,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:00,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:00,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:00,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:00,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 277 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:00,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:00,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:00,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:00,794 INFO L124 PetriNetUnfolderBase]: 3488/5234 cut-off events. [2024-05-12 13:27:00,794 INFO L125 PetriNetUnfolderBase]: For 9074/9074 co-relation queries the response was YES. [2024-05-12 13:27:00,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16041 conditions, 5234 events. 3488/5234 cut-off events. For 9074/9074 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 29182 event pairs, 798 based on Foata normal form. 8/5227 useless extension candidates. Maximal degree in co-relation 16018. Up to 4567 conditions per place. [2024-05-12 13:27:00,821 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 80 selfloop transitions, 30 changer transitions 5/125 dead transitions. [2024-05-12 13:27:00,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 757 flow [2024-05-12 13:27:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 13:27:00,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5835866261398176 [2024-05-12 13:27:00,823 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 277 flow. Second operand 7 states and 192 transitions. [2024-05-12 13:27:00,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 757 flow [2024-05-12 13:27:00,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 733 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:27:00,830 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 454 flow [2024-05-12 13:27:00,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-05-12 13:27:00,831 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2024-05-12 13:27:00,831 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 454 flow [2024-05-12 13:27:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:00,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:00,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:00,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:27:00,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:00,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:00,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1944878465, now seen corresponding path program 2 times [2024-05-12 13:27:00,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103116149] [2024-05-12 13:27:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:01,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103116149] [2024-05-12 13:27:01,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103116149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:01,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843776107] [2024-05-12 13:27:01,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:01,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:01,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 454 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:01,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:01,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:01,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:02,220 INFO L124 PetriNetUnfolderBase]: 3126/4727 cut-off events. [2024-05-12 13:27:02,220 INFO L125 PetriNetUnfolderBase]: For 9930/9932 co-relation queries the response was YES. [2024-05-12 13:27:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15641 conditions, 4727 events. 3126/4727 cut-off events. For 9930/9932 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26242 event pairs, 730 based on Foata normal form. 12/4722 useless extension candidates. Maximal degree in co-relation 15614. Up to 4038 conditions per place. [2024-05-12 13:27:02,244 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 72 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-05-12 13:27:02,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 844 flow [2024-05-12 13:27:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-05-12 13:27:02,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-05-12 13:27:02,245 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 454 flow. Second operand 6 states and 158 transitions. [2024-05-12 13:27:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 844 flow [2024-05-12 13:27:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 805 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:02,254 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 554 flow [2024-05-12 13:27:02,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=554, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-05-12 13:27:02,255 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2024-05-12 13:27:02,255 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 554 flow [2024-05-12 13:27:02,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:02,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:02,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:02,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:27:02,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:02,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1508164525, now seen corresponding path program 3 times [2024-05-12 13:27:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044599302] [2024-05-12 13:27:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044599302] [2024-05-12 13:27:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044599302] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:02,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350322612] [2024-05-12 13:27:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:02,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:02,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:02,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:02,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:02,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:03,495 INFO L124 PetriNetUnfolderBase]: 3084/4647 cut-off events. [2024-05-12 13:27:03,495 INFO L125 PetriNetUnfolderBase]: For 12064/12066 co-relation queries the response was YES. [2024-05-12 13:27:03,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15760 conditions, 4647 events. 3084/4647 cut-off events. For 12064/12066 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25463 event pairs, 738 based on Foata normal form. 6/4630 useless extension candidates. Maximal degree in co-relation 15732. Up to 3982 conditions per place. [2024-05-12 13:27:03,524 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 68 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2024-05-12 13:27:03,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 862 flow [2024-05-12 13:27:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-05-12 13:27:03,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-05-12 13:27:03,526 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 554 flow. Second operand 6 states and 154 transitions. [2024-05-12 13:27:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 862 flow [2024-05-12 13:27:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 809 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:03,540 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 581 flow [2024-05-12 13:27:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-05-12 13:27:03,541 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2024-05-12 13:27:03,541 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 581 flow [2024-05-12 13:27:03,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:03,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:03,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:27:03,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:03,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -117736677, now seen corresponding path program 1 times [2024-05-12 13:27:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792395075] [2024-05-12 13:27:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792395075] [2024-05-12 13:27:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792395075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:04,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:04,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658757744] [2024-05-12 13:27:04,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:04,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:04,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:04,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:27:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:27:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:05,172 INFO L124 PetriNetUnfolderBase]: 2646/4199 cut-off events. [2024-05-12 13:27:05,172 INFO L125 PetriNetUnfolderBase]: For 11356/11358 co-relation queries the response was YES. [2024-05-12 13:27:05,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14135 conditions, 4199 events. 2646/4199 cut-off events. For 11356/11358 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24298 event pairs, 685 based on Foata normal form. 4/4187 useless extension candidates. Maximal degree in co-relation 14106. Up to 3773 conditions per place. [2024-05-12 13:27:05,195 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 97 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-05-12 13:27:05,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 940 flow [2024-05-12 13:27:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:27:05,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-05-12 13:27:05,197 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 581 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:27:05,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 940 flow [2024-05-12 13:27:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 121 transitions, 820 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:05,208 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 543 flow [2024-05-12 13:27:05,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-05-12 13:27:05,208 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-05-12 13:27:05,208 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 543 flow [2024-05-12 13:27:05,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:05,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:05,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:05,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:27:05,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:05,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1618370634, now seen corresponding path program 1 times [2024-05-12 13:27:05,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:05,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359226831] [2024-05-12 13:27:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359226831] [2024-05-12 13:27:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359226831] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:05,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:05,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:27:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138731926] [2024-05-12 13:27:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:05,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:27:05,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:27:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:27:05,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:27:05,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 543 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-05-12 13:27:05,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:05,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:27:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:06,274 INFO L124 PetriNetUnfolderBase]: 2648/4536 cut-off events. [2024-05-12 13:27:06,274 INFO L125 PetriNetUnfolderBase]: For 10513/10515 co-relation queries the response was YES. [2024-05-12 13:27:06,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14541 conditions, 4536 events. 2648/4536 cut-off events. For 10513/10515 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29031 event pairs, 981 based on Foata normal form. 1/4431 useless extension candidates. Maximal degree in co-relation 14510. Up to 3837 conditions per place. [2024-05-12 13:27:06,303 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 86 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2024-05-12 13:27:06,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 824 flow [2024-05-12 13:27:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:27:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:27:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-05-12 13:27:06,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-05-12 13:27:06,304 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 543 flow. Second operand 5 states and 121 transitions. [2024-05-12 13:27:06,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 824 flow [2024-05-12 13:27:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 785 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:27:06,317 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 598 flow [2024-05-12 13:27:06,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=598, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-05-12 13:27:06,318 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-05-12 13:27:06,318 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 598 flow [2024-05-12 13:27:06,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-05-12 13:27:06,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:06,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:06,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:27:06,318 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:06,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:06,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1285844150, now seen corresponding path program 1 times [2024-05-12 13:27:06,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:06,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227536987] [2024-05-12 13:27:06,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:06,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227536987] [2024-05-12 13:27:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227536987] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:06,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231097120] [2024-05-12 13:27:06,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:07,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:07,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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) [2024-05-12 13:27:07,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:07,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:07,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:07,824 INFO L124 PetriNetUnfolderBase]: 3368/5470 cut-off events. [2024-05-12 13:27:07,824 INFO L125 PetriNetUnfolderBase]: For 16852/16854 co-relation queries the response was YES. [2024-05-12 13:27:07,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18766 conditions, 5470 events. 3368/5470 cut-off events. For 16852/16854 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33199 event pairs, 623 based on Foata normal form. 16/5350 useless extension candidates. Maximal degree in co-relation 18733. Up to 3533 conditions per place. [2024-05-12 13:27:07,854 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 98 selfloop transitions, 36 changer transitions 0/144 dead transitions. [2024-05-12 13:27:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 144 transitions, 1078 flow [2024-05-12 13:27:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 13:27:07,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683890577507599 [2024-05-12 13:27:07,856 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 598 flow. Second operand 7 states and 187 transitions. [2024-05-12 13:27:07,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 144 transitions, 1078 flow [2024-05-12 13:27:07,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 144 transitions, 1055 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 13:27:07,872 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 679 flow [2024-05-12 13:27:07,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=679, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2024-05-12 13:27:07,872 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 32 predicate places. [2024-05-12 13:27:07,872 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 679 flow [2024-05-12 13:27:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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) [2024-05-12 13:27:07,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:07,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:07,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:27:07,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:07,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1288701110, now seen corresponding path program 2 times [2024-05-12 13:27:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602509363] [2024-05-12 13:27:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602509363] [2024-05-12 13:27:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602509363] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756523387] [2024-05-12 13:27:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:08,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:08,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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) [2024-05-12 13:27:08,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:08,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:09,475 INFO L124 PetriNetUnfolderBase]: 3482/5709 cut-off events. [2024-05-12 13:27:09,475 INFO L125 PetriNetUnfolderBase]: For 21027/21029 co-relation queries the response was YES. [2024-05-12 13:27:09,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20209 conditions, 5709 events. 3482/5709 cut-off events. For 21027/21029 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 35386 event pairs, 906 based on Foata normal form. 24/5577 useless extension candidates. Maximal degree in co-relation 20174. Up to 4280 conditions per place. [2024-05-12 13:27:09,509 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 40 changer transitions 0/142 dead transitions. [2024-05-12 13:27:09,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1111 flow [2024-05-12 13:27:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:27:09,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-05-12 13:27:09,511 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 679 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:27:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1111 flow [2024-05-12 13:27:09,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 142 transitions, 1066 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:09,534 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 750 flow [2024-05-12 13:27:09,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=750, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-05-12 13:27:09,534 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 36 predicate places. [2024-05-12 13:27:09,534 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 750 flow [2024-05-12 13:27:09,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 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) [2024-05-12 13:27:09,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:09,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:09,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:27:09,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:09,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1849958713, now seen corresponding path program 1 times [2024-05-12 13:27:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555388275] [2024-05-12 13:27:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:10,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:10,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555388275] [2024-05-12 13:27:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555388275] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:10,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:10,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519601171] [2024-05-12 13:27:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:10,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:10,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:10,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:10,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 750 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:10,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:10,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:10,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:10,846 INFO L124 PetriNetUnfolderBase]: 3499/5823 cut-off events. [2024-05-12 13:27:10,846 INFO L125 PetriNetUnfolderBase]: For 22865/22871 co-relation queries the response was YES. [2024-05-12 13:27:10,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21265 conditions, 5823 events. 3499/5823 cut-off events. For 22865/22871 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37442 event pairs, 1279 based on Foata normal form. 7/5687 useless extension candidates. Maximal degree in co-relation 21228. Up to 5064 conditions per place. [2024-05-12 13:27:10,878 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 105 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2024-05-12 13:27:10,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 1151 flow [2024-05-12 13:27:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 13:27:10,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-05-12 13:27:10,880 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 750 flow. Second operand 6 states and 143 transitions. [2024-05-12 13:27:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 1151 flow [2024-05-12 13:27:10,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1059 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:10,909 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 797 flow [2024-05-12 13:27:10,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=797, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-05-12 13:27:10,910 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 38 predicate places. [2024-05-12 13:27:10,910 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 797 flow [2024-05-12 13:27:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:10,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:27:10,911 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:10,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1484339718, now seen corresponding path program 1 times [2024-05-12 13:27:10,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437580731] [2024-05-12 13:27:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:10,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437580731] [2024-05-12 13:27:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437580731] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:11,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196096965] [2024-05-12 13:27:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:11,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:11,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 797 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:11,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:11,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:11,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:12,734 INFO L124 PetriNetUnfolderBase]: 3578/5885 cut-off events. [2024-05-12 13:27:12,735 INFO L125 PetriNetUnfolderBase]: For 24286/24288 co-relation queries the response was YES. [2024-05-12 13:27:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 5885 events. 3578/5885 cut-off events. For 24286/24288 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37115 event pairs, 1011 based on Foata normal form. 4/5733 useless extension candidates. Maximal degree in co-relation 22032. Up to 4667 conditions per place. [2024-05-12 13:27:12,771 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 102 selfloop transitions, 62 changer transitions 0/174 dead transitions. [2024-05-12 13:27:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 174 transitions, 1481 flow [2024-05-12 13:27:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:27:12,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-05-12 13:27:12,772 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 797 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:27:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 174 transitions, 1481 flow [2024-05-12 13:27:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1445 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:12,805 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1099 flow [2024-05-12 13:27:12,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-05-12 13:27:12,806 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 44 predicate places. [2024-05-12 13:27:12,806 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1099 flow [2024-05-12 13:27:12,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:12,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:12,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:12,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:27:12,806 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:12,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1475768838, now seen corresponding path program 2 times [2024-05-12 13:27:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058632437] [2024-05-12 13:27:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:13,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:13,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058632437] [2024-05-12 13:27:13,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058632437] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:13,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:13,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015883619] [2024-05-12 13:27:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:13,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:13,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:13,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:13,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:13,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:13,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:13,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:14,659 INFO L124 PetriNetUnfolderBase]: 3663/6009 cut-off events. [2024-05-12 13:27:14,659 INFO L125 PetriNetUnfolderBase]: For 29266/29268 co-relation queries the response was YES. [2024-05-12 13:27:14,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23850 conditions, 6009 events. 3663/6009 cut-off events. For 29266/29268 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37971 event pairs, 838 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 23809. Up to 4424 conditions per place. [2024-05-12 13:27:14,697 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 105 selfloop transitions, 69 changer transitions 0/184 dead transitions. [2024-05-12 13:27:14,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 184 transitions, 1747 flow [2024-05-12 13:27:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:27:14,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-05-12 13:27:14,699 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1099 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:27:14,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 184 transitions, 1747 flow [2024-05-12 13:27:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 184 transitions, 1652 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:14,749 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1242 flow [2024-05-12 13:27:14,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1242, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-05-12 13:27:14,750 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-05-12 13:27:14,750 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1242 flow [2024-05-12 13:27:14,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:14,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:14,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:14,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:27:14,750 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:14,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:14,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1712240868, now seen corresponding path program 3 times [2024-05-12 13:27:14,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:14,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236855655] [2024-05-12 13:27:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:14,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:15,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236855655] [2024-05-12 13:27:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236855655] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:15,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626045293] [2024-05-12 13:27:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:15,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:15,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1242 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:15,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:15,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:15,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:16,592 INFO L124 PetriNetUnfolderBase]: 3655/6024 cut-off events. [2024-05-12 13:27:16,592 INFO L125 PetriNetUnfolderBase]: For 33490/33492 co-relation queries the response was YES. [2024-05-12 13:27:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24336 conditions, 6024 events. 3655/6024 cut-off events. For 33490/33492 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 38240 event pairs, 1050 based on Foata normal form. 4/5868 useless extension candidates. Maximal degree in co-relation 24293. Up to 4790 conditions per place. [2024-05-12 13:27:16,628 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 107 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2024-05-12 13:27:16,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 179 transitions, 1763 flow [2024-05-12 13:27:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:27:16,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-05-12 13:27:16,629 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1242 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:27:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 179 transitions, 1763 flow [2024-05-12 13:27:16,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 179 transitions, 1604 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:16,690 INFO L231 Difference]: Finished difference. Result has 107 places, 130 transitions, 1237 flow [2024-05-12 13:27:16,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1237, PETRI_PLACES=107, PETRI_TRANSITIONS=130} [2024-05-12 13:27:16,690 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 54 predicate places. [2024-05-12 13:27:16,690 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 130 transitions, 1237 flow [2024-05-12 13:27:16,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:16,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:16,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:27:16,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:16,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -475974699, now seen corresponding path program 2 times [2024-05-12 13:27:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205122862] [2024-05-12 13:27:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:17,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:17,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205122862] [2024-05-12 13:27:17,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205122862] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:17,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:17,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859741320] [2024-05-12 13:27:17,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:17,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:17,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:17,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 130 transitions, 1237 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:17,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:17,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:17,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:18,036 INFO L124 PetriNetUnfolderBase]: 3657/6144 cut-off events. [2024-05-12 13:27:18,037 INFO L125 PetriNetUnfolderBase]: For 34695/34719 co-relation queries the response was YES. [2024-05-12 13:27:18,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24354 conditions, 6144 events. 3657/6144 cut-off events. For 34695/34719 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40332 event pairs, 1217 based on Foata normal form. 21/6010 useless extension candidates. Maximal degree in co-relation 24309. Up to 5283 conditions per place. [2024-05-12 13:27:18,077 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 128 selfloop transitions, 20 changer transitions 0/158 dead transitions. [2024-05-12 13:27:18,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 158 transitions, 1653 flow [2024-05-12 13:27:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-05-12 13:27:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-05-12 13:27:18,078 INFO L175 Difference]: Start difference. First operand has 107 places, 130 transitions, 1237 flow. Second operand 6 states and 140 transitions. [2024-05-12 13:27:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 158 transitions, 1653 flow [2024-05-12 13:27:18,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 158 transitions, 1521 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:18,130 INFO L231 Difference]: Finished difference. Result has 109 places, 136 transitions, 1212 flow [2024-05-12 13:27:18,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1212, PETRI_PLACES=109, PETRI_TRANSITIONS=136} [2024-05-12 13:27:18,130 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 56 predicate places. [2024-05-12 13:27:18,130 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 136 transitions, 1212 flow [2024-05-12 13:27:18,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:18,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:18,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:18,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:27:18,131 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:18,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash 909075603, now seen corresponding path program 1 times [2024-05-12 13:27:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696017938] [2024-05-12 13:27:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:18,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696017938] [2024-05-12 13:27:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696017938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:18,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:18,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084204375] [2024-05-12 13:27:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:18,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:18,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:18,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:18,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:18,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:27:18,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 136 transitions, 1212 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:18,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:18,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:27:18,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:19,472 INFO L124 PetriNetUnfolderBase]: 3424/5875 cut-off events. [2024-05-12 13:27:19,472 INFO L125 PetriNetUnfolderBase]: For 37827/37829 co-relation queries the response was YES. [2024-05-12 13:27:19,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23719 conditions, 5875 events. 3424/5875 cut-off events. For 37827/37829 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39256 event pairs, 1113 based on Foata normal form. 3/5722 useless extension candidates. Maximal degree in co-relation 23672. Up to 4923 conditions per place. [2024-05-12 13:27:19,507 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 137 selfloop transitions, 13 changer transitions 0/164 dead transitions. [2024-05-12 13:27:19,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 164 transitions, 1632 flow [2024-05-12 13:27:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-05-12 13:27:19,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-05-12 13:27:19,510 INFO L175 Difference]: Start difference. First operand has 109 places, 136 transitions, 1212 flow. Second operand 6 states and 146 transitions. [2024-05-12 13:27:19,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 164 transitions, 1632 flow [2024-05-12 13:27:19,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 164 transitions, 1596 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-05-12 13:27:19,567 INFO L231 Difference]: Finished difference. Result has 114 places, 143 transitions, 1281 flow [2024-05-12 13:27:19,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1281, PETRI_PLACES=114, PETRI_TRANSITIONS=143} [2024-05-12 13:27:19,567 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 61 predicate places. [2024-05-12 13:27:19,568 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 143 transitions, 1281 flow [2024-05-12 13:27:19,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:19,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:19,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:19,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:27:19,568 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:19,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -475968747, now seen corresponding path program 2 times [2024-05-12 13:27:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:19,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260637055] [2024-05-12 13:27:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:20,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260637055] [2024-05-12 13:27:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260637055] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:20,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:20,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:27:20,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698902195] [2024-05-12 13:27:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:27:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:27:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:27:20,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:27:20,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 1281 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:20,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:20,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:27:20,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:21,016 INFO L124 PetriNetUnfolderBase]: 3469/6061 cut-off events. [2024-05-12 13:27:21,016 INFO L125 PetriNetUnfolderBase]: For 41225/41233 co-relation queries the response was YES. [2024-05-12 13:27:21,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24939 conditions, 6061 events. 3469/6061 cut-off events. For 41225/41233 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 41038 event pairs, 1126 based on Foata normal form. 7/5879 useless extension candidates. Maximal degree in co-relation 24889. Up to 4953 conditions per place. [2024-05-12 13:27:21,058 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 133 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-05-12 13:27:21,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 167 transitions, 1683 flow [2024-05-12 13:27:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:27:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:27:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-05-12 13:27:21,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-05-12 13:27:21,059 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 1281 flow. Second operand 6 states and 147 transitions. [2024-05-12 13:27:21,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 167 transitions, 1683 flow [2024-05-12 13:27:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 167 transitions, 1650 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:21,121 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1325 flow [2024-05-12 13:27:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-05-12 13:27:21,121 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 64 predicate places. [2024-05-12 13:27:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1325 flow [2024-05-12 13:27:21,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:21,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:21,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:27:21,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:21,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 909321681, now seen corresponding path program 1 times [2024-05-12 13:27:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:21,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703119206] [2024-05-12 13:27:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:22,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703119206] [2024-05-12 13:27:22,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703119206] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:22,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:22,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070692973] [2024-05-12 13:27:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:22,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:22,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1325 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:22,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:22,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:22,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:22,785 INFO L124 PetriNetUnfolderBase]: 3765/6466 cut-off events. [2024-05-12 13:27:22,785 INFO L125 PetriNetUnfolderBase]: For 44392/44394 co-relation queries the response was YES. [2024-05-12 13:27:22,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26953 conditions, 6466 events. 3765/6466 cut-off events. For 44392/44394 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 43340 event pairs, 1251 based on Foata normal form. 1/6268 useless extension candidates. Maximal degree in co-relation 26902. Up to 5458 conditions per place. [2024-05-12 13:27:22,829 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 148 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2024-05-12 13:27:22,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 173 transitions, 1765 flow [2024-05-12 13:27:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 13:27:22,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48328267477203646 [2024-05-12 13:27:22,831 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1325 flow. Second operand 7 states and 159 transitions. [2024-05-12 13:27:22,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 173 transitions, 1765 flow [2024-05-12 13:27:22,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1712 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:27:22,899 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1346 flow [2024-05-12 13:27:22,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1346, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-05-12 13:27:22,900 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 67 predicate places. [2024-05-12 13:27:22,900 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1346 flow [2024-05-12 13:27:22,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:22,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:22,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:27:22,900 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:22,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2069169873, now seen corresponding path program 1 times [2024-05-12 13:27:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:22,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497402363] [2024-05-12 13:27:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:22,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497402363] [2024-05-12 13:27:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497402363] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:23,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:23,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300667252] [2024-05-12 13:27:23,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:23,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:23,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:23,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1346 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:23,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:23,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:24,444 INFO L124 PetriNetUnfolderBase]: 3816/6426 cut-off events. [2024-05-12 13:27:24,444 INFO L125 PetriNetUnfolderBase]: For 48047/48063 co-relation queries the response was YES. [2024-05-12 13:27:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27505 conditions, 6426 events. 3816/6426 cut-off events. For 48047/48063 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 42628 event pairs, 1173 based on Foata normal form. 17/6280 useless extension candidates. Maximal degree in co-relation 27453. Up to 5328 conditions per place. [2024-05-12 13:27:24,483 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 162 selfloop transitions, 39 changer transitions 0/211 dead transitions. [2024-05-12 13:27:24,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 211 transitions, 2138 flow [2024-05-12 13:27:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-05-12 13:27:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-05-12 13:27:24,485 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1346 flow. Second operand 7 states and 175 transitions. [2024-05-12 13:27:24,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 211 transitions, 2138 flow [2024-05-12 13:27:24,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 211 transitions, 2064 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:24,558 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 1706 flow [2024-05-12 13:27:24,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1706, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2024-05-12 13:27:24,559 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-05-12 13:27:24,559 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 1706 flow [2024-05-12 13:27:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:24,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:24,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:27:24,559 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:24,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2003810008, now seen corresponding path program 1 times [2024-05-12 13:27:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:24,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026648534] [2024-05-12 13:27:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026648534] [2024-05-12 13:27:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026648534] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:25,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862401185] [2024-05-12 13:27:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:25,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:25,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 1706 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:25,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:25,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:25,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:26,497 INFO L124 PetriNetUnfolderBase]: 4081/6892 cut-off events. [2024-05-12 13:27:26,497 INFO L125 PetriNetUnfolderBase]: For 59090/59092 co-relation queries the response was YES. [2024-05-12 13:27:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31570 conditions, 6892 events. 4081/6892 cut-off events. For 59090/59092 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 46330 event pairs, 1159 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 31516. Up to 4811 conditions per place. [2024-05-12 13:27:26,550 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 150 selfloop transitions, 78 changer transitions 0/238 dead transitions. [2024-05-12 13:27:26,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 238 transitions, 2484 flow [2024-05-12 13:27:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:27:26,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-05-12 13:27:26,551 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 1706 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:27:26,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 238 transitions, 2484 flow [2024-05-12 13:27:26,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 238 transitions, 2404 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:26,642 INFO L231 Difference]: Finished difference. Result has 130 places, 184 transitions, 1961 flow [2024-05-12 13:27:26,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1961, PETRI_PLACES=130, PETRI_TRANSITIONS=184} [2024-05-12 13:27:26,643 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 77 predicate places. [2024-05-12 13:27:26,643 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 184 transitions, 1961 flow [2024-05-12 13:27:26,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:26,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:26,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:26,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:27:26,643 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:26,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1883198970, now seen corresponding path program 1 times [2024-05-12 13:27:26,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:26,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023278742] [2024-05-12 13:27:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:26,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023278742] [2024-05-12 13:27:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023278742] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:27,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:27,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566934393] [2024-05-12 13:27:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:27,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:27,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 184 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:27,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:28,212 INFO L124 PetriNetUnfolderBase]: 4098/6926 cut-off events. [2024-05-12 13:27:28,213 INFO L125 PetriNetUnfolderBase]: For 64733/64747 co-relation queries the response was YES. [2024-05-12 13:27:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33054 conditions, 6926 events. 4098/6926 cut-off events. For 64733/64747 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 46689 event pairs, 1264 based on Foata normal form. 15/6764 useless extension candidates. Maximal degree in co-relation 32997. Up to 5938 conditions per place. [2024-05-12 13:27:28,269 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 189 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-05-12 13:27:28,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 217 transitions, 2531 flow [2024-05-12 13:27:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-05-12 13:27:28,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49848024316109424 [2024-05-12 13:27:28,270 INFO L175 Difference]: Start difference. First operand has 130 places, 184 transitions, 1961 flow. Second operand 7 states and 164 transitions. [2024-05-12 13:27:28,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 217 transitions, 2531 flow [2024-05-12 13:27:28,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 217 transitions, 2441 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:27:28,374 INFO L231 Difference]: Finished difference. Result has 133 places, 187 transitions, 1961 flow [2024-05-12 13:27:28,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=133, PETRI_TRANSITIONS=187} [2024-05-12 13:27:28,374 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 80 predicate places. [2024-05-12 13:27:28,374 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 187 transitions, 1961 flow [2024-05-12 13:27:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:28,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:28,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:27:28,375 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:28,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1889145833, now seen corresponding path program 2 times [2024-05-12 13:27:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:28,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751159600] [2024-05-12 13:27:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:29,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:29,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751159600] [2024-05-12 13:27:29,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751159600] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:29,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:29,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:29,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287144252] [2024-05-12 13:27:29,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:29,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:29,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:29,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:29,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:29,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 187 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:29,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:29,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:29,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:29,994 INFO L124 PetriNetUnfolderBase]: 4233/7164 cut-off events. [2024-05-12 13:27:29,994 INFO L125 PetriNetUnfolderBase]: For 69579/69587 co-relation queries the response was YES. [2024-05-12 13:27:30,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34109 conditions, 7164 events. 4233/7164 cut-off events. For 69579/69587 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 48712 event pairs, 1270 based on Foata normal form. 7/6987 useless extension candidates. Maximal degree in co-relation 34052. Up to 5798 conditions per place. [2024-05-12 13:27:30,052 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 175 selfloop transitions, 42 changer transitions 0/227 dead transitions. [2024-05-12 13:27:30,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 227 transitions, 2651 flow [2024-05-12 13:27:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:27:30,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-05-12 13:27:30,053 INFO L175 Difference]: Start difference. First operand has 133 places, 187 transitions, 1961 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:27:30,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 227 transitions, 2651 flow [2024-05-12 13:27:30,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 227 transitions, 2583 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:30,184 INFO L231 Difference]: Finished difference. Result has 136 places, 195 transitions, 2100 flow [2024-05-12 13:27:30,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2100, PETRI_PLACES=136, PETRI_TRANSITIONS=195} [2024-05-12 13:27:30,184 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 83 predicate places. [2024-05-12 13:27:30,184 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 195 transitions, 2100 flow [2024-05-12 13:27:30,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:30,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:30,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:27:30,185 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:30,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 433695708, now seen corresponding path program 2 times [2024-05-12 13:27:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:30,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027372540] [2024-05-12 13:27:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027372540] [2024-05-12 13:27:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027372540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872993155] [2024-05-12 13:27:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:31,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:31,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 195 transitions, 2100 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:31,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:31,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:31,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:32,191 INFO L124 PetriNetUnfolderBase]: 4213/7251 cut-off events. [2024-05-12 13:27:32,191 INFO L125 PetriNetUnfolderBase]: For 78595/78597 co-relation queries the response was YES. [2024-05-12 13:27:32,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 7251 events. 4213/7251 cut-off events. For 78595/78597 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 49523 event pairs, 822 based on Foata normal form. 12/7052 useless extension candidates. Maximal degree in co-relation 35384. Up to 4161 conditions per place. [2024-05-12 13:27:32,258 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 152 selfloop transitions, 78 changer transitions 0/240 dead transitions. [2024-05-12 13:27:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 240 transitions, 2748 flow [2024-05-12 13:27:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:27:32,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-05-12 13:27:32,259 INFO L175 Difference]: Start difference. First operand has 136 places, 195 transitions, 2100 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:27:32,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 240 transitions, 2748 flow [2024-05-12 13:27:32,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 240 transitions, 2666 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:27:32,399 INFO L231 Difference]: Finished difference. Result has 140 places, 195 transitions, 2183 flow [2024-05-12 13:27:32,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2183, PETRI_PLACES=140, PETRI_TRANSITIONS=195} [2024-05-12 13:27:32,399 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 87 predicate places. [2024-05-12 13:27:32,399 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 195 transitions, 2183 flow [2024-05-12 13:27:32,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:32,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:32,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:27:32,400 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:32,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash 699392988, now seen corresponding path program 3 times [2024-05-12 13:27:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:32,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36344268] [2024-05-12 13:27:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36344268] [2024-05-12 13:27:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36344268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:33,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325415070] [2024-05-12 13:27:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:33,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:33,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 195 transitions, 2183 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:33,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:33,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:33,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:34,310 INFO L124 PetriNetUnfolderBase]: 4193/7169 cut-off events. [2024-05-12 13:27:34,310 INFO L125 PetriNetUnfolderBase]: For 80680/80682 co-relation queries the response was YES. [2024-05-12 13:27:34,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35786 conditions, 7169 events. 4193/7169 cut-off events. For 80680/80682 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 48466 event pairs, 686 based on Foata normal form. 12/6971 useless extension candidates. Maximal degree in co-relation 35725. Up to 3923 conditions per place. [2024-05-12 13:27:34,370 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 150 selfloop transitions, 75 changer transitions 0/235 dead transitions. [2024-05-12 13:27:34,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 235 transitions, 2775 flow [2024-05-12 13:27:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:27:34,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-05-12 13:27:34,371 INFO L175 Difference]: Start difference. First operand has 140 places, 195 transitions, 2183 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:27:34,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 235 transitions, 2775 flow [2024-05-12 13:27:34,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 235 transitions, 2579 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:34,483 INFO L231 Difference]: Finished difference. Result has 140 places, 194 transitions, 2109 flow [2024-05-12 13:27:34,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=140, PETRI_TRANSITIONS=194} [2024-05-12 13:27:34,484 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 87 predicate places. [2024-05-12 13:27:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 194 transitions, 2109 flow [2024-05-12 13:27:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:27:34,484 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:34,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:34,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1869866490, now seen corresponding path program 2 times [2024-05-12 13:27:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996779545] [2024-05-12 13:27:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996779545] [2024-05-12 13:27:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996779545] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:35,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:35,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83623862] [2024-05-12 13:27:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:35,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:35,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 194 transitions, 2109 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:35,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:35,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:35,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:36,294 INFO L124 PetriNetUnfolderBase]: 4210/7349 cut-off events. [2024-05-12 13:27:36,294 INFO L125 PetriNetUnfolderBase]: For 79038/79040 co-relation queries the response was YES. [2024-05-12 13:27:36,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35852 conditions, 7349 events. 4210/7349 cut-off events. For 79038/79040 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 51220 event pairs, 1903 based on Foata normal form. 1/7116 useless extension candidates. Maximal degree in co-relation 35790. Up to 6099 conditions per place. [2024-05-12 13:27:36,366 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 195 selfloop transitions, 17 changer transitions 0/222 dead transitions. [2024-05-12 13:27:36,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2696 flow [2024-05-12 13:27:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-05-12 13:27:36,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574468085106383 [2024-05-12 13:27:36,367 INFO L175 Difference]: Start difference. First operand has 140 places, 194 transitions, 2109 flow. Second operand 8 states and 172 transitions. [2024-05-12 13:27:36,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2696 flow [2024-05-12 13:27:36,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 222 transitions, 2493 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:36,492 INFO L231 Difference]: Finished difference. Result has 143 places, 199 transitions, 2030 flow [2024-05-12 13:27:36,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2030, PETRI_PLACES=143, PETRI_TRANSITIONS=199} [2024-05-12 13:27:36,492 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 90 predicate places. [2024-05-12 13:27:36,492 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 199 transitions, 2030 flow [2024-05-12 13:27:36,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:36,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:36,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:27:36,493 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1870312363, now seen corresponding path program 3 times [2024-05-12 13:27:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527838801] [2024-05-12 13:27:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527838801] [2024-05-12 13:27:37,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527838801] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:37,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:37,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563242092] [2024-05-12 13:27:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:37,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:37,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:37,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 199 transitions, 2030 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:37,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:37,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:37,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:38,212 INFO L124 PetriNetUnfolderBase]: 4300/7487 cut-off events. [2024-05-12 13:27:38,212 INFO L125 PetriNetUnfolderBase]: For 80826/80834 co-relation queries the response was YES. [2024-05-12 13:27:38,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35643 conditions, 7487 events. 4300/7487 cut-off events. For 80826/80834 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 52141 event pairs, 1259 based on Foata normal form. 7/7239 useless extension candidates. Maximal degree in co-relation 35580. Up to 5702 conditions per place. [2024-05-12 13:27:38,263 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 178 selfloop transitions, 54 changer transitions 0/242 dead transitions. [2024-05-12 13:27:38,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 2856 flow [2024-05-12 13:27:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:27:38,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-05-12 13:27:38,264 INFO L175 Difference]: Start difference. First operand has 143 places, 199 transitions, 2030 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:27:38,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 2856 flow [2024-05-12 13:27:38,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 242 transitions, 2780 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:38,380 INFO L231 Difference]: Finished difference. Result has 147 places, 212 transitions, 2258 flow [2024-05-12 13:27:38,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=147, PETRI_TRANSITIONS=212} [2024-05-12 13:27:38,381 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 94 predicate places. [2024-05-12 13:27:38,381 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 212 transitions, 2258 flow [2024-05-12 13:27:38,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:38,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:38,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:27:38,381 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1870311960, now seen corresponding path program 3 times [2024-05-12 13:27:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019409789] [2024-05-12 13:27:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019409789] [2024-05-12 13:27:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019409789] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765111916] [2024-05-12 13:27:39,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:39,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:39,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:39,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:39,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 212 transitions, 2258 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:39,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:39,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:39,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:40,110 INFO L124 PetriNetUnfolderBase]: 4302/7508 cut-off events. [2024-05-12 13:27:40,111 INFO L125 PetriNetUnfolderBase]: For 90375/90409 co-relation queries the response was YES. [2024-05-12 13:27:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37539 conditions, 7508 events. 4302/7508 cut-off events. For 90375/90409 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 52446 event pairs, 1275 based on Foata normal form. 29/7286 useless extension candidates. Maximal degree in co-relation 37473. Up to 6153 conditions per place. [2024-05-12 13:27:40,175 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 201 selfloop transitions, 30 changer transitions 0/241 dead transitions. [2024-05-12 13:27:40,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 241 transitions, 2890 flow [2024-05-12 13:27:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-05-12 13:27:40,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-05-12 13:27:40,177 INFO L175 Difference]: Start difference. First operand has 147 places, 212 transitions, 2258 flow. Second operand 7 states and 162 transitions. [2024-05-12 13:27:40,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 241 transitions, 2890 flow [2024-05-12 13:27:40,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 2792 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-05-12 13:27:40,327 INFO L231 Difference]: Finished difference. Result has 152 places, 215 transitions, 2294 flow [2024-05-12 13:27:40,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2294, PETRI_PLACES=152, PETRI_TRANSITIONS=215} [2024-05-12 13:27:40,328 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-05-12 13:27:40,328 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 215 transitions, 2294 flow [2024-05-12 13:27:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:40,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:40,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:27:40,329 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:40,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:40,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2048302645, now seen corresponding path program 1 times [2024-05-12 13:27:40,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:40,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626352085] [2024-05-12 13:27:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:40,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626352085] [2024-05-12 13:27:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626352085] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:41,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:41,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941634366] [2024-05-12 13:27:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:41,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-05-12 13:27:41,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 215 transitions, 2294 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:41,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:41,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-05-12 13:27:41,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:42,175 INFO L124 PetriNetUnfolderBase]: 4186/7258 cut-off events. [2024-05-12 13:27:42,176 INFO L125 PetriNetUnfolderBase]: For 108222/108395 co-relation queries the response was YES. [2024-05-12 13:27:42,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37131 conditions, 7258 events. 4186/7258 cut-off events. For 108222/108395 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 51201 event pairs, 1780 based on Foata normal form. 30/6995 useless extension candidates. Maximal degree in co-relation 37063. Up to 5910 conditions per place. [2024-05-12 13:27:42,247 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 206 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2024-05-12 13:27:42,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 247 transitions, 2890 flow [2024-05-12 13:27:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:27:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:27:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:27:42,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-05-12 13:27:42,248 INFO L175 Difference]: Start difference. First operand has 152 places, 215 transitions, 2294 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:27:42,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 247 transitions, 2890 flow [2024-05-12 13:27:42,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 247 transitions, 2778 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:42,397 INFO L231 Difference]: Finished difference. Result has 154 places, 218 transitions, 2278 flow [2024-05-12 13:27:42,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2278, PETRI_PLACES=154, PETRI_TRANSITIONS=218} [2024-05-12 13:27:42,398 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 101 predicate places. [2024-05-12 13:27:42,398 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 218 transitions, 2278 flow [2024-05-12 13:27:42,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:42,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:42,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:42,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:27:42,399 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:42,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 158417590, now seen corresponding path program 1 times [2024-05-12 13:27:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:42,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853594960] [2024-05-12 13:27:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:43,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853594960] [2024-05-12 13:27:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853594960] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:43,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597785998] [2024-05-12 13:27:43,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:43,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:43,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:43,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 218 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:43,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:43,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:44,271 INFO L124 PetriNetUnfolderBase]: 4681/7892 cut-off events. [2024-05-12 13:27:44,271 INFO L125 PetriNetUnfolderBase]: For 104389/104397 co-relation queries the response was YES. [2024-05-12 13:27:44,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40956 conditions, 7892 events. 4681/7892 cut-off events. For 104389/104397 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 54299 event pairs, 1446 based on Foata normal form. 9/7694 useless extension candidates. Maximal degree in co-relation 40887. Up to 6239 conditions per place. [2024-05-12 13:27:44,347 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 228 selfloop transitions, 59 changer transitions 0/297 dead transitions. [2024-05-12 13:27:44,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 297 transitions, 3552 flow [2024-05-12 13:27:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:27:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:27:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:27:44,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-05-12 13:27:44,349 INFO L175 Difference]: Start difference. First operand has 154 places, 218 transitions, 2278 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:27:44,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 297 transitions, 3552 flow [2024-05-12 13:27:44,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 297 transitions, 3482 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:44,515 INFO L231 Difference]: Finished difference. Result has 161 places, 246 transitions, 2732 flow [2024-05-12 13:27:44,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2732, PETRI_PLACES=161, PETRI_TRANSITIONS=246} [2024-05-12 13:27:44,515 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 108 predicate places. [2024-05-12 13:27:44,516 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 246 transitions, 2732 flow [2024-05-12 13:27:44,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:44,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:44,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:44,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:27:44,516 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:44,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:44,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1869850618, now seen corresponding path program 1 times [2024-05-12 13:27:44,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:44,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11712813] [2024-05-12 13:27:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:45,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11712813] [2024-05-12 13:27:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11712813] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:45,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:45,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321136395] [2024-05-12 13:27:45,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:45,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:45,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 246 transitions, 2732 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:45,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:45,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:45,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:46,839 INFO L124 PetriNetUnfolderBase]: 4684/8169 cut-off events. [2024-05-12 13:27:46,839 INFO L125 PetriNetUnfolderBase]: For 120033/120035 co-relation queries the response was YES. [2024-05-12 13:27:46,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43204 conditions, 8169 events. 4684/8169 cut-off events. For 120033/120035 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 58128 event pairs, 2010 based on Foata normal form. 2/7903 useless extension candidates. Maximal degree in co-relation 43131. Up to 6722 conditions per place. [2024-05-12 13:27:46,913 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 249 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-05-12 13:27:46,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 277 transitions, 3430 flow [2024-05-12 13:27:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-05-12 13:27:46,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47606382978723405 [2024-05-12 13:27:46,915 INFO L175 Difference]: Start difference. First operand has 161 places, 246 transitions, 2732 flow. Second operand 8 states and 179 transitions. [2024-05-12 13:27:46,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 277 transitions, 3430 flow [2024-05-12 13:27:47,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 277 transitions, 3345 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-05-12 13:27:47,091 INFO L231 Difference]: Finished difference. Result has 167 places, 248 transitions, 2742 flow [2024-05-12 13:27:47,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2742, PETRI_PLACES=167, PETRI_TRANSITIONS=248} [2024-05-12 13:27:47,091 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 114 predicate places. [2024-05-12 13:27:47,091 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 248 transitions, 2742 flow [2024-05-12 13:27:47,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:47,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:47,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:47,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:27:47,092 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:47,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1757488384, now seen corresponding path program 2 times [2024-05-12 13:27:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:47,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017915071] [2024-05-12 13:27:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:47,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017915071] [2024-05-12 13:27:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017915071] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:47,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:47,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941767228] [2024-05-12 13:27:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:47,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:47,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:47,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 248 transitions, 2742 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:47,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:47,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:48,989 INFO L124 PetriNetUnfolderBase]: 4819/8135 cut-off events. [2024-05-12 13:27:48,989 INFO L125 PetriNetUnfolderBase]: For 124706/124726 co-relation queries the response was YES. [2024-05-12 13:27:49,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44468 conditions, 8135 events. 4819/8135 cut-off events. For 124706/124726 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 56377 event pairs, 1493 based on Foata normal form. 21/7942 useless extension candidates. Maximal degree in co-relation 44393. Up to 6680 conditions per place. [2024-05-12 13:27:49,072 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 237 selfloop transitions, 60 changer transitions 0/307 dead transitions. [2024-05-12 13:27:49,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 307 transitions, 3708 flow [2024-05-12 13:27:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:27:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:27:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 13:27:49,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-05-12 13:27:49,073 INFO L175 Difference]: Start difference. First operand has 167 places, 248 transitions, 2742 flow. Second operand 9 states and 222 transitions. [2024-05-12 13:27:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 307 transitions, 3708 flow [2024-05-12 13:27:49,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 307 transitions, 3629 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:49,310 INFO L231 Difference]: Finished difference. Result has 172 places, 266 transitions, 3066 flow [2024-05-12 13:27:49,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2663, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3066, PETRI_PLACES=172, PETRI_TRANSITIONS=266} [2024-05-12 13:27:49,311 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 119 predicate places. [2024-05-12 13:27:49,311 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 266 transitions, 3066 flow [2024-05-12 13:27:49,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:49,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:49,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:49,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:27:49,311 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:49,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:49,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1284161210, now seen corresponding path program 3 times [2024-05-12 13:27:49,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:49,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205685013] [2024-05-12 13:27:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:49,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:49,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205685013] [2024-05-12 13:27:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205685013] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:49,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089833263] [2024-05-12 13:27:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:50,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:50,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 266 transitions, 3066 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:50,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:50,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:50,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:51,479 INFO L124 PetriNetUnfolderBase]: 5000/8406 cut-off events. [2024-05-12 13:27:51,479 INFO L125 PetriNetUnfolderBase]: For 136115/136127 co-relation queries the response was YES. [2024-05-12 13:27:51,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47618 conditions, 8406 events. 5000/8406 cut-off events. For 136115/136127 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 58051 event pairs, 1532 based on Foata normal form. 13/8196 useless extension candidates. Maximal degree in co-relation 47540. Up to 6844 conditions per place. [2024-05-12 13:27:51,574 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 244 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-05-12 13:27:51,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 326 transitions, 4215 flow [2024-05-12 13:27:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:27:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:27:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 13:27:51,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2024-05-12 13:27:51,575 INFO L175 Difference]: Start difference. First operand has 172 places, 266 transitions, 3066 flow. Second operand 9 states and 221 transitions. [2024-05-12 13:27:51,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 326 transitions, 4215 flow [2024-05-12 13:27:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 326 transitions, 3981 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:51,858 INFO L231 Difference]: Finished difference. Result has 179 places, 287 transitions, 3435 flow [2024-05-12 13:27:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3435, PETRI_PLACES=179, PETRI_TRANSITIONS=287} [2024-05-12 13:27:51,859 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 126 predicate places. [2024-05-12 13:27:51,859 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 287 transitions, 3435 flow [2024-05-12 13:27:51,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:51,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:51,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:27:51,859 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1789388084, now seen corresponding path program 1 times [2024-05-12 13:27:51,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:51,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253518083] [2024-05-12 13:27:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:52,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:52,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253518083] [2024-05-12 13:27:52,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253518083] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:52,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:52,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659877142] [2024-05-12 13:27:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:52,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:52,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 287 transitions, 3435 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:52,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:52,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:52,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:53,743 INFO L124 PetriNetUnfolderBase]: 5068/8525 cut-off events. [2024-05-12 13:27:53,743 INFO L125 PetriNetUnfolderBase]: For 144198/144204 co-relation queries the response was YES. [2024-05-12 13:27:53,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48759 conditions, 8525 events. 5068/8525 cut-off events. For 144198/144204 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 59014 event pairs, 1542 based on Foata normal form. 8/8305 useless extension candidates. Maximal degree in co-relation 48677. Up to 7032 conditions per place. [2024-05-12 13:27:53,836 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 255 selfloop transitions, 61 changer transitions 0/326 dead transitions. [2024-05-12 13:27:53,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 326 transitions, 4289 flow [2024-05-12 13:27:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:27:53,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-05-12 13:27:53,837 INFO L175 Difference]: Start difference. First operand has 179 places, 287 transitions, 3435 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:27:53,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 326 transitions, 4289 flow [2024-05-12 13:27:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 326 transitions, 4117 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 13:27:54,113 INFO L231 Difference]: Finished difference. Result has 182 places, 293 transitions, 3498 flow [2024-05-12 13:27:54,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3267, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3498, PETRI_PLACES=182, PETRI_TRANSITIONS=293} [2024-05-12 13:27:54,114 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 129 predicate places. [2024-05-12 13:27:54,114 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 293 transitions, 3498 flow [2024-05-12 13:27:54,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:54,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:54,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:27:54,114 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:54,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1274874354, now seen corresponding path program 2 times [2024-05-12 13:27:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:54,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032887274] [2024-05-12 13:27:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032887274] [2024-05-12 13:27:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032887274] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:27:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744918167] [2024-05-12 13:27:54,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:54,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:27:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:54,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:27:54,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:27:54,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:54,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 293 transitions, 3498 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:54,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:54,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:54,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:56,090 INFO L124 PetriNetUnfolderBase]: 5136/8650 cut-off events. [2024-05-12 13:27:56,090 INFO L125 PetriNetUnfolderBase]: For 149994/150000 co-relation queries the response was YES. [2024-05-12 13:27:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49566 conditions, 8650 events. 5136/8650 cut-off events. For 149994/150000 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 60121 event pairs, 1507 based on Foata normal form. 8/8429 useless extension candidates. Maximal degree in co-relation 49483. Up to 6850 conditions per place. [2024-05-12 13:27:56,186 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 245 selfloop transitions, 80 changer transitions 0/335 dead transitions. [2024-05-12 13:27:56,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 335 transitions, 4464 flow [2024-05-12 13:27:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:27:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:27:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:27:56,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-05-12 13:27:56,189 INFO L175 Difference]: Start difference. First operand has 182 places, 293 transitions, 3498 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:27:56,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 335 transitions, 4464 flow [2024-05-12 13:27:56,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 335 transitions, 4357 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 13:27:56,484 INFO L231 Difference]: Finished difference. Result has 187 places, 299 transitions, 3685 flow [2024-05-12 13:27:56,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=187, PETRI_TRANSITIONS=299} [2024-05-12 13:27:56,485 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 134 predicate places. [2024-05-12 13:27:56,485 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 299 transitions, 3685 flow [2024-05-12 13:27:56,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:56,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:56,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:56,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:27:56,485 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:56,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:56,486 INFO L85 PathProgramCache]: Analyzing trace with hash 110416074, now seen corresponding path program 1 times [2024-05-12 13:27:56,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:56,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447233954] [2024-05-12 13:27:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:57,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447233954] [2024-05-12 13:27:57,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447233954] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:57,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:57,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902377876] [2024-05-12 13:27:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:57,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:57,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 299 transitions, 3685 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:57,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:57,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:57,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:27:58,621 INFO L124 PetriNetUnfolderBase]: 5163/8735 cut-off events. [2024-05-12 13:27:58,621 INFO L125 PetriNetUnfolderBase]: For 157753/157759 co-relation queries the response was YES. [2024-05-12 13:27:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50693 conditions, 8735 events. 5163/8735 cut-off events. For 157753/157759 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 61157 event pairs, 1868 based on Foata normal form. 7/8501 useless extension candidates. Maximal degree in co-relation 50608. Up to 7352 conditions per place. [2024-05-12 13:27:58,708 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 303 selfloop transitions, 39 changer transitions 0/352 dead transitions. [2024-05-12 13:27:58,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 352 transitions, 4790 flow [2024-05-12 13:27:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:27:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:27:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-05-12 13:27:58,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988179669030733 [2024-05-12 13:27:58,709 INFO L175 Difference]: Start difference. First operand has 187 places, 299 transitions, 3685 flow. Second operand 9 states and 211 transitions. [2024-05-12 13:27:58,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 352 transitions, 4790 flow [2024-05-12 13:27:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 352 transitions, 4604 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:27:59,027 INFO L231 Difference]: Finished difference. Result has 193 places, 313 transitions, 3903 flow [2024-05-12 13:27:59,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3903, PETRI_PLACES=193, PETRI_TRANSITIONS=313} [2024-05-12 13:27:59,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-05-12 13:27:59,028 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 313 transitions, 3903 flow [2024-05-12 13:27:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:59,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:27:59,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:27:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:27:59,028 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:27:59,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:27:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1274877950, now seen corresponding path program 4 times [2024-05-12 13:27:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:27:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57842741] [2024-05-12 13:27:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:27:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:27:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:27:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:27:59,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:27:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57842741] [2024-05-12 13:27:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57842741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:27:59,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:27:59,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:27:59,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882064524] [2024-05-12 13:27:59,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:27:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:27:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:27:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:27:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:27:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:27:59,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 313 transitions, 3903 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:27:59,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:27:59,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:27:59,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:01,133 INFO L124 PetriNetUnfolderBase]: 5198/8753 cut-off events. [2024-05-12 13:28:01,133 INFO L125 PetriNetUnfolderBase]: For 163844/163850 co-relation queries the response was YES. [2024-05-12 13:28:01,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51302 conditions, 8753 events. 5198/8753 cut-off events. For 163844/163850 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 61027 event pairs, 1518 based on Foata normal form. 7/8525 useless extension candidates. Maximal degree in co-relation 51213. Up to 6573 conditions per place. [2024-05-12 13:28:01,246 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 251 selfloop transitions, 97 changer transitions 0/358 dead transitions. [2024-05-12 13:28:01,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 358 transitions, 4950 flow [2024-05-12 13:28:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:28:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:28:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:28:01,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-05-12 13:28:01,247 INFO L175 Difference]: Start difference. First operand has 193 places, 313 transitions, 3903 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:28:01,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 358 transitions, 4950 flow [2024-05-12 13:28:01,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 358 transitions, 4729 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-05-12 13:28:01,631 INFO L231 Difference]: Finished difference. Result has 200 places, 318 transitions, 4041 flow [2024-05-12 13:28:01,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4041, PETRI_PLACES=200, PETRI_TRANSITIONS=318} [2024-05-12 13:28:01,632 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 147 predicate places. [2024-05-12 13:28:01,632 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 318 transitions, 4041 flow [2024-05-12 13:28:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:01,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:01,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:28:01,632 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:01,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash -280241556, now seen corresponding path program 5 times [2024-05-12 13:28:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:01,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488377429] [2024-05-12 13:28:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:02,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:02,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488377429] [2024-05-12 13:28:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488377429] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:02,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144551502] [2024-05-12 13:28:02,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:02,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:02,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:02,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:02,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 318 transitions, 4041 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:02,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:02,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:03,782 INFO L124 PetriNetUnfolderBase]: 5249/8806 cut-off events. [2024-05-12 13:28:03,782 INFO L125 PetriNetUnfolderBase]: For 173871/173883 co-relation queries the response was YES. [2024-05-12 13:28:03,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53094 conditions, 8806 events. 5249/8806 cut-off events. For 173871/173883 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 61286 event pairs, 1558 based on Foata normal form. 13/8588 useless extension candidates. Maximal degree in co-relation 53002. Up to 7046 conditions per place. [2024-05-12 13:28:03,881 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 259 selfloop transitions, 89 changer transitions 0/358 dead transitions. [2024-05-12 13:28:03,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 358 transitions, 4973 flow [2024-05-12 13:28:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:28:03,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-05-12 13:28:03,882 INFO L175 Difference]: Start difference. First operand has 200 places, 318 transitions, 4041 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:28:03,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 358 transitions, 4973 flow [2024-05-12 13:28:04,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 358 transitions, 4765 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 13:28:04,205 INFO L231 Difference]: Finished difference. Result has 203 places, 322 transitions, 4129 flow [2024-05-12 13:28:04,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4129, PETRI_PLACES=203, PETRI_TRANSITIONS=322} [2024-05-12 13:28:04,206 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-05-12 13:28:04,206 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 322 transitions, 4129 flow [2024-05-12 13:28:04,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:04,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:04,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:04,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:28:04,207 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:04,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash -276698380, now seen corresponding path program 3 times [2024-05-12 13:28:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264471101] [2024-05-12 13:28:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:04,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264471101] [2024-05-12 13:28:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264471101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:04,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:04,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900389032] [2024-05-12 13:28:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:04,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:04,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 322 transitions, 4129 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:04,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:04,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:06,224 INFO L124 PetriNetUnfolderBase]: 5345/8976 cut-off events. [2024-05-12 13:28:06,224 INFO L125 PetriNetUnfolderBase]: For 188027/188033 co-relation queries the response was YES. [2024-05-12 13:28:06,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54977 conditions, 8976 events. 5345/8976 cut-off events. For 188027/188033 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 62723 event pairs, 1404 based on Foata normal form. 12/8750 useless extension candidates. Maximal degree in co-relation 54884. Up to 7328 conditions per place. [2024-05-12 13:28:06,327 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 282 selfloop transitions, 69 changer transitions 0/361 dead transitions. [2024-05-12 13:28:06,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 361 transitions, 5134 flow [2024-05-12 13:28:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:28:06,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-05-12 13:28:06,329 INFO L175 Difference]: Start difference. First operand has 203 places, 322 transitions, 4129 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:28:06,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 361 transitions, 5134 flow [2024-05-12 13:28:06,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 361 transitions, 4902 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-05-12 13:28:06,834 INFO L231 Difference]: Finished difference. Result has 204 places, 331 transitions, 4229 flow [2024-05-12 13:28:06,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=204, PETRI_TRANSITIONS=331} [2024-05-12 13:28:06,834 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 151 predicate places. [2024-05-12 13:28:06,834 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 331 transitions, 4229 flow [2024-05-12 13:28:06,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:06,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:06,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:06,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:28:06,835 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:06,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1566026738, now seen corresponding path program 4 times [2024-05-12 13:28:06,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:06,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131489005] [2024-05-12 13:28:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:06,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:07,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131489005] [2024-05-12 13:28:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131489005] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:07,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:07,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:07,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442649279] [2024-05-12 13:28:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:07,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:07,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:07,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:07,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 331 transitions, 4229 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:07,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:07,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:07,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:08,873 INFO L124 PetriNetUnfolderBase]: 5373/9030 cut-off events. [2024-05-12 13:28:08,873 INFO L125 PetriNetUnfolderBase]: For 189904/189910 co-relation queries the response was YES. [2024-05-12 13:28:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55208 conditions, 9030 events. 5373/9030 cut-off events. For 189904/189910 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 63305 event pairs, 1362 based on Foata normal form. 8/8805 useless extension candidates. Maximal degree in co-relation 55114. Up to 6930 conditions per place. [2024-05-12 13:28:08,988 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 256 selfloop transitions, 97 changer transitions 0/363 dead transitions. [2024-05-12 13:28:08,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 363 transitions, 5195 flow [2024-05-12 13:28:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:28:08,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-05-12 13:28:08,992 INFO L175 Difference]: Start difference. First operand has 204 places, 331 transitions, 4229 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:28:08,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 363 transitions, 5195 flow [2024-05-12 13:28:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 363 transitions, 5053 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-05-12 13:28:09,452 INFO L231 Difference]: Finished difference. Result has 208 places, 334 transitions, 4365 flow [2024-05-12 13:28:09,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4365, PETRI_PLACES=208, PETRI_TRANSITIONS=334} [2024-05-12 13:28:09,452 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 155 predicate places. [2024-05-12 13:28:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 334 transitions, 4365 flow [2024-05-12 13:28:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:09,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:28:09,453 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:09,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash -270958296, now seen corresponding path program 6 times [2024-05-12 13:28:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:09,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560127615] [2024-05-12 13:28:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:10,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560127615] [2024-05-12 13:28:10,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560127615] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:10,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:10,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:10,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465255759] [2024-05-12 13:28:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:10,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:10,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 334 transitions, 4365 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:10,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:11,645 INFO L124 PetriNetUnfolderBase]: 5568/9345 cut-off events. [2024-05-12 13:28:11,645 INFO L125 PetriNetUnfolderBase]: For 202815/202821 co-relation queries the response was YES. [2024-05-12 13:28:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57978 conditions, 9345 events. 5568/9345 cut-off events. For 202815/202821 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 65791 event pairs, 1410 based on Foata normal form. 7/9111 useless extension candidates. Maximal degree in co-relation 57883. Up to 6560 conditions per place. [2024-05-12 13:28:11,748 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 247 selfloop transitions, 125 changer transitions 0/382 dead transitions. [2024-05-12 13:28:11,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 382 transitions, 5689 flow [2024-05-12 13:28:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:28:11,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-05-12 13:28:11,749 INFO L175 Difference]: Start difference. First operand has 208 places, 334 transitions, 4365 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:28:11,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 382 transitions, 5689 flow [2024-05-12 13:28:12,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 382 transitions, 5529 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:28:12,182 INFO L231 Difference]: Finished difference. Result has 213 places, 346 transitions, 4819 flow [2024-05-12 13:28:12,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4205, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4819, PETRI_PLACES=213, PETRI_TRANSITIONS=346} [2024-05-12 13:28:12,183 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 160 predicate places. [2024-05-12 13:28:12,183 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 346 transitions, 4819 flow [2024-05-12 13:28:12,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:12,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:12,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:12,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:28:12,184 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:12,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash -270945772, now seen corresponding path program 2 times [2024-05-12 13:28:12,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:12,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752083629] [2024-05-12 13:28:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:12,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752083629] [2024-05-12 13:28:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752083629] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168454093] [2024-05-12 13:28:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:13,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 346 transitions, 4819 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:13,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:14,686 INFO L124 PetriNetUnfolderBase]: 5590/9413 cut-off events. [2024-05-12 13:28:14,686 INFO L125 PetriNetUnfolderBase]: For 220953/220959 co-relation queries the response was YES. [2024-05-12 13:28:14,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60436 conditions, 9413 events. 5590/9413 cut-off events. For 220953/220959 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 66432 event pairs, 1894 based on Foata normal form. 7/9168 useless extension candidates. Maximal degree in co-relation 60339. Up to 7916 conditions per place. [2024-05-12 13:28:14,781 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 340 selfloop transitions, 33 changer transitions 0/383 dead transitions. [2024-05-12 13:28:14,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 383 transitions, 5790 flow [2024-05-12 13:28:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-05-12 13:28:14,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-05-12 13:28:14,782 INFO L175 Difference]: Start difference. First operand has 213 places, 346 transitions, 4819 flow. Second operand 8 states and 184 transitions. [2024-05-12 13:28:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 383 transitions, 5790 flow [2024-05-12 13:28:15,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 383 transitions, 5642 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-05-12 13:28:15,330 INFO L231 Difference]: Finished difference. Result has 218 places, 352 transitions, 4856 flow [2024-05-12 13:28:15,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4856, PETRI_PLACES=218, PETRI_TRANSITIONS=352} [2024-05-12 13:28:15,330 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-05-12 13:28:15,330 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 352 transitions, 4856 flow [2024-05-12 13:28:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:15,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:15,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:28:15,331 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:15,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash 306195220, now seen corresponding path program 7 times [2024-05-12 13:28:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610608793] [2024-05-12 13:28:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:15,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:16,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610608793] [2024-05-12 13:28:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610608793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:16,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:16,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422149840] [2024-05-12 13:28:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:16,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:16,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 352 transitions, 4856 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:16,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:16,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:16,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:17,615 INFO L124 PetriNetUnfolderBase]: 5585/9363 cut-off events. [2024-05-12 13:28:17,615 INFO L125 PetriNetUnfolderBase]: For 221914/221920 co-relation queries the response was YES. [2024-05-12 13:28:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60477 conditions, 9363 events. 5585/9363 cut-off events. For 221914/221920 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65859 event pairs, 1340 based on Foata normal form. 7/9117 useless extension candidates. Maximal degree in co-relation 60378. Up to 6588 conditions per place. [2024-05-12 13:28:17,717 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 253 selfloop transitions, 125 changer transitions 0/388 dead transitions. [2024-05-12 13:28:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 388 transitions, 5928 flow [2024-05-12 13:28:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:28:17,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523936170212766 [2024-05-12 13:28:17,718 INFO L175 Difference]: Start difference. First operand has 218 places, 352 transitions, 4856 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:28:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 388 transitions, 5928 flow [2024-05-12 13:28:18,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 388 transitions, 5744 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-05-12 13:28:18,371 INFO L231 Difference]: Finished difference. Result has 221 places, 352 transitions, 4936 flow [2024-05-12 13:28:18,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4936, PETRI_PLACES=221, PETRI_TRANSITIONS=352} [2024-05-12 13:28:18,372 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 168 predicate places. [2024-05-12 13:28:18,372 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 352 transitions, 4936 flow [2024-05-12 13:28:18,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:18,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:18,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:18,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:28:18,372 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:18,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash 553887416, now seen corresponding path program 5 times [2024-05-12 13:28:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:18,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499782134] [2024-05-12 13:28:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:18,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:18,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499782134] [2024-05-12 13:28:18,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499782134] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:18,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:18,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009643753] [2024-05-12 13:28:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:19,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:19,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 352 transitions, 4936 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:19,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:19,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:19,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:20,490 INFO L124 PetriNetUnfolderBase]: 5557/9316 cut-off events. [2024-05-12 13:28:20,490 INFO L125 PetriNetUnfolderBase]: For 226653/226653 co-relation queries the response was YES. [2024-05-12 13:28:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60840 conditions, 9316 events. 5557/9316 cut-off events. For 226653/226653 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 65314 event pairs, 1492 based on Foata normal form. 4/9064 useless extension candidates. Maximal degree in co-relation 60740. Up to 7694 conditions per place. [2024-05-12 13:28:20,595 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 305 selfloop transitions, 64 changer transitions 0/379 dead transitions. [2024-05-12 13:28:20,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 379 transitions, 5802 flow [2024-05-12 13:28:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:28:20,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-05-12 13:28:20,596 INFO L175 Difference]: Start difference. First operand has 221 places, 352 transitions, 4936 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:28:20,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 379 transitions, 5802 flow [2024-05-12 13:28:21,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 379 transitions, 5542 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 13:28:21,178 INFO L231 Difference]: Finished difference. Result has 222 places, 352 transitions, 4814 flow [2024-05-12 13:28:21,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4676, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4814, PETRI_PLACES=222, PETRI_TRANSITIONS=352} [2024-05-12 13:28:21,178 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-05-12 13:28:21,178 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 352 transitions, 4814 flow [2024-05-12 13:28:21,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:21,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:28:21,179 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 930869044, now seen corresponding path program 6 times [2024-05-12 13:28:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695274397] [2024-05-12 13:28:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:21,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:21,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695274397] [2024-05-12 13:28:21,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695274397] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:21,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:21,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432761544] [2024-05-12 13:28:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:21,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:21,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:21,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 352 transitions, 4814 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:21,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:21,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:21,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:23,292 INFO L124 PetriNetUnfolderBase]: 5591/9382 cut-off events. [2024-05-12 13:28:23,293 INFO L125 PetriNetUnfolderBase]: For 226631/226631 co-relation queries the response was YES. [2024-05-12 13:28:23,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60393 conditions, 9382 events. 5591/9382 cut-off events. For 226631/226631 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 66058 event pairs, 1428 based on Foata normal form. 2/9128 useless extension candidates. Maximal degree in co-relation 60292. Up to 7572 conditions per place. [2024-05-12 13:28:23,405 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 291 selfloop transitions, 81 changer transitions 0/382 dead transitions. [2024-05-12 13:28:23,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 382 transitions, 5727 flow [2024-05-12 13:28:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:23,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:28:23,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-05-12 13:28:23,406 INFO L175 Difference]: Start difference. First operand has 222 places, 352 transitions, 4814 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:28:23,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 382 transitions, 5727 flow [2024-05-12 13:28:24,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 382 transitions, 5391 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-05-12 13:28:24,043 INFO L231 Difference]: Finished difference. Result has 222 places, 356 transitions, 4736 flow [2024-05-12 13:28:24,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4736, PETRI_PLACES=222, PETRI_TRANSITIONS=356} [2024-05-12 13:28:24,044 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-05-12 13:28:24,044 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 356 transitions, 4736 flow [2024-05-12 13:28:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:24,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:24,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:24,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:28:24,044 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:24,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2139389068, now seen corresponding path program 7 times [2024-05-12 13:28:24,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:24,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661344575] [2024-05-12 13:28:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:24,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:24,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661344575] [2024-05-12 13:28:24,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661344575] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:24,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:24,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:24,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803913937] [2024-05-12 13:28:24,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:24,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:24,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:24,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 356 transitions, 4736 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:24,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:24,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:24,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:26,225 INFO L124 PetriNetUnfolderBase]: 5625/9640 cut-off events. [2024-05-12 13:28:26,225 INFO L125 PetriNetUnfolderBase]: For 229527/229533 co-relation queries the response was YES. [2024-05-12 13:28:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61233 conditions, 9640 events. 5625/9640 cut-off events. For 229527/229533 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 69067 event pairs, 1342 based on Foata normal form. 6/9334 useless extension candidates. Maximal degree in co-relation 61130. Up to 7048 conditions per place. [2024-05-12 13:28:26,348 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 260 selfloop transitions, 116 changer transitions 0/386 dead transitions. [2024-05-12 13:28:26,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 386 transitions, 5748 flow [2024-05-12 13:28:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:28:26,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-05-12 13:28:26,349 INFO L175 Difference]: Start difference. First operand has 222 places, 356 transitions, 4736 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:28:26,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 386 transitions, 5748 flow [2024-05-12 13:28:27,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 386 transitions, 5581 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:28:27,025 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4857 flow [2024-05-12 13:28:27,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4857, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-05-12 13:28:27,026 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 172 predicate places. [2024-05-12 13:28:27,026 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4857 flow [2024-05-12 13:28:27,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:27,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:27,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:28:27,026 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:27,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2145102988, now seen corresponding path program 8 times [2024-05-12 13:28:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841144325] [2024-05-12 13:28:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:27,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:27,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841144325] [2024-05-12 13:28:27,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841144325] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:27,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:27,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:28:27,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264653206] [2024-05-12 13:28:27,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:27,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:28:27,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:28:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:28:27,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:27,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4857 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:27,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:27,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:27,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:29,375 INFO L124 PetriNetUnfolderBase]: 5609/9628 cut-off events. [2024-05-12 13:28:29,376 INFO L125 PetriNetUnfolderBase]: For 230117/230123 co-relation queries the response was YES. [2024-05-12 13:28:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61313 conditions, 9628 events. 5609/9628 cut-off events. For 230117/230123 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69042 event pairs, 1335 based on Foata normal form. 8/9320 useless extension candidates. Maximal degree in co-relation 61209. Up to 7035 conditions per place. [2024-05-12 13:28:29,476 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 269 selfloop transitions, 106 changer transitions 0/385 dead transitions. [2024-05-12 13:28:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 385 transitions, 5731 flow [2024-05-12 13:28:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:28:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:28:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:28:29,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-05-12 13:28:29,477 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4857 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:28:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 385 transitions, 5731 flow [2024-05-12 13:28:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 385 transitions, 5397 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-05-12 13:28:29,969 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4743 flow [2024-05-12 13:28:29,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4743, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-05-12 13:28:29,969 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 172 predicate places. [2024-05-12 13:28:29,969 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4743 flow [2024-05-12 13:28:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:28:29,970 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2130809260, now seen corresponding path program 3 times [2024-05-12 13:28:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698701874] [2024-05-12 13:28:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:30,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698701874] [2024-05-12 13:28:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698701874] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:30,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:30,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481807071] [2024-05-12 13:28:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:30,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:30,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:30,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4743 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:30,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:30,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:30,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:32,565 INFO L124 PetriNetUnfolderBase]: 5626/9714 cut-off events. [2024-05-12 13:28:32,565 INFO L125 PetriNetUnfolderBase]: For 233512/233512 co-relation queries the response was YES. [2024-05-12 13:28:32,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60940 conditions, 9714 events. 5626/9714 cut-off events. For 233512/233512 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 70187 event pairs, 2196 based on Foata normal form. 1/9396 useless extension candidates. Maximal degree in co-relation 60838. Up to 7992 conditions per place. [2024-05-12 13:28:32,678 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 363 selfloop transitions, 22 changer transitions 0/395 dead transitions. [2024-05-12 13:28:32,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 395 transitions, 5749 flow [2024-05-12 13:28:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:28:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:28:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-05-12 13:28:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728132387706856 [2024-05-12 13:28:32,679 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4743 flow. Second operand 9 states and 200 transitions. [2024-05-12 13:28:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 395 transitions, 5749 flow [2024-05-12 13:28:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 395 transitions, 5527 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 13:28:33,187 INFO L231 Difference]: Finished difference. Result has 228 places, 362 transitions, 4666 flow [2024-05-12 13:28:33,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4666, PETRI_PLACES=228, PETRI_TRANSITIONS=362} [2024-05-12 13:28:33,187 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 175 predicate places. [2024-05-12 13:28:33,187 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 362 transitions, 4666 flow [2024-05-12 13:28:33,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:33,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:33,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:33,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:28:33,188 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:33,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2131284924, now seen corresponding path program 8 times [2024-05-12 13:28:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:33,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624365971] [2024-05-12 13:28:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:33,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:34,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624365971] [2024-05-12 13:28:34,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624365971] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:34,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083617260] [2024-05-12 13:28:34,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:34,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:34,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:34,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 362 transitions, 4666 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:34,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:34,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:34,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:35,907 INFO L124 PetriNetUnfolderBase]: 5761/9919 cut-off events. [2024-05-12 13:28:35,907 INFO L125 PetriNetUnfolderBase]: For 249142/249148 co-relation queries the response was YES. [2024-05-12 13:28:35,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62577 conditions, 9919 events. 5761/9919 cut-off events. For 249142/249148 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71720 event pairs, 2165 based on Foata normal form. 7/9608 useless extension candidates. Maximal degree in co-relation 62474. Up to 7970 conditions per place. [2024-05-12 13:28:36,034 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 357 selfloop transitions, 36 changer transitions 0/403 dead transitions. [2024-05-12 13:28:36,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 403 transitions, 5900 flow [2024-05-12 13:28:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:28:36,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2024-05-12 13:28:36,035 INFO L175 Difference]: Start difference. First operand has 228 places, 362 transitions, 4666 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:28:36,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 403 transitions, 5900 flow [2024-05-12 13:28:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 403 transitions, 5779 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-05-12 13:28:36,619 INFO L231 Difference]: Finished difference. Result has 230 places, 370 transitions, 4845 flow [2024-05-12 13:28:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4845, PETRI_PLACES=230, PETRI_TRANSITIONS=370} [2024-05-12 13:28:36,620 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 177 predicate places. [2024-05-12 13:28:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 370 transitions, 4845 flow [2024-05-12 13:28:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:28:36,620 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2145094494, now seen corresponding path program 9 times [2024-05-12 13:28:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124343267] [2024-05-12 13:28:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124343267] [2024-05-12 13:28:37,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124343267] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:37,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:37,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:37,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256317403] [2024-05-12 13:28:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:37,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:37,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:37,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:37,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 370 transitions, 4845 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:37,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:37,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:37,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:39,041 INFO L124 PetriNetUnfolderBase]: 5871/9798 cut-off events. [2024-05-12 13:28:39,041 INFO L125 PetriNetUnfolderBase]: For 271812/271818 co-relation queries the response was YES. [2024-05-12 13:28:39,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65231 conditions, 9798 events. 5871/9798 cut-off events. For 271812/271818 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 68792 event pairs, 1458 based on Foata normal form. 7/9538 useless extension candidates. Maximal degree in co-relation 65126. Up to 6389 conditions per place. [2024-05-12 13:28:39,161 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 262 selfloop transitions, 142 changer transitions 0/414 dead transitions. [2024-05-12 13:28:39,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 414 transitions, 6359 flow [2024-05-12 13:28:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:28:39,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-05-12 13:28:39,162 INFO L175 Difference]: Start difference. First operand has 230 places, 370 transitions, 4845 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:28:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 414 transitions, 6359 flow [2024-05-12 13:28:39,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 414 transitions, 6010 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-05-12 13:28:39,793 INFO L231 Difference]: Finished difference. Result has 234 places, 378 transitions, 5026 flow [2024-05-12 13:28:39,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5026, PETRI_PLACES=234, PETRI_TRANSITIONS=378} [2024-05-12 13:28:39,794 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 181 predicate places. [2024-05-12 13:28:39,794 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 378 transitions, 5026 flow [2024-05-12 13:28:39,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:39,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:39,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:39,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:28:39,795 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:39,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:39,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2145094060, now seen corresponding path program 4 times [2024-05-12 13:28:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473944298] [2024-05-12 13:28:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:39,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:40,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:40,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473944298] [2024-05-12 13:28:40,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473944298] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:40,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:40,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267405150] [2024-05-12 13:28:40,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:40,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:40,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 378 transitions, 5026 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:40,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:40,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:40,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:42,383 INFO L124 PetriNetUnfolderBase]: 5888/9833 cut-off events. [2024-05-12 13:28:42,383 INFO L125 PetriNetUnfolderBase]: For 289057/289081 co-relation queries the response was YES. [2024-05-12 13:28:42,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66043 conditions, 9833 events. 5888/9833 cut-off events. For 289057/289081 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 69362 event pairs, 1905 based on Foata normal form. 19/9603 useless extension candidates. Maximal degree in co-relation 65937. Up to 8241 conditions per place. [2024-05-12 13:28:42,512 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 351 selfloop transitions, 61 changer transitions 0/422 dead transitions. [2024-05-12 13:28:42,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 422 transitions, 6478 flow [2024-05-12 13:28:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-05-12 13:28:42,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-05-12 13:28:42,513 INFO L175 Difference]: Start difference. First operand has 234 places, 378 transitions, 5026 flow. Second operand 8 states and 184 transitions. [2024-05-12 13:28:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 422 transitions, 6478 flow [2024-05-12 13:28:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 422 transitions, 6148 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-05-12 13:28:43,433 INFO L231 Difference]: Finished difference. Result has 239 places, 392 transitions, 5372 flow [2024-05-12 13:28:43,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5372, PETRI_PLACES=239, PETRI_TRANSITIONS=392} [2024-05-12 13:28:43,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-05-12 13:28:43,434 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 392 transitions, 5372 flow [2024-05-12 13:28:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:43,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:43,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:28:43,434 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:43,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2145106584, now seen corresponding path program 10 times [2024-05-12 13:28:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:43,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630970350] [2024-05-12 13:28:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630970350] [2024-05-12 13:28:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630970350] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:44,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:44,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012425040] [2024-05-12 13:28:44,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:44,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:44,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:44,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:44,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 392 transitions, 5372 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:44,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:44,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:44,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:45,978 INFO L124 PetriNetUnfolderBase]: 5919/9873 cut-off events. [2024-05-12 13:28:45,979 INFO L125 PetriNetUnfolderBase]: For 286232/286238 co-relation queries the response was YES. [2024-05-12 13:28:46,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65789 conditions, 9873 events. 5919/9873 cut-off events. For 286232/286238 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69321 event pairs, 1462 based on Foata normal form. 7/9612 useless extension candidates. Maximal degree in co-relation 65680. Up to 6441 conditions per place. [2024-05-12 13:28:46,109 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 270 selfloop transitions, 150 changer transitions 0/430 dead transitions. [2024-05-12 13:28:46,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 430 transitions, 6671 flow [2024-05-12 13:28:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:28:46,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526595744680851 [2024-05-12 13:28:46,110 INFO L175 Difference]: Start difference. First operand has 239 places, 392 transitions, 5372 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:28:46,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 430 transitions, 6671 flow [2024-05-12 13:28:46,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 6260 flow, removed 196 selfloop flow, removed 2 redundant places. [2024-05-12 13:28:46,975 INFO L231 Difference]: Finished difference. Result has 245 places, 396 transitions, 5377 flow [2024-05-12 13:28:46,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4961, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5377, PETRI_PLACES=245, PETRI_TRANSITIONS=396} [2024-05-12 13:28:46,975 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 192 predicate places. [2024-05-12 13:28:46,976 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 396 transitions, 5377 flow [2024-05-12 13:28:46,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:46,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:46,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:46,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:28:46,976 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:46,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1349301804, now seen corresponding path program 1 times [2024-05-12 13:28:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126675983] [2024-05-12 13:28:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:46,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:47,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:47,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126675983] [2024-05-12 13:28:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126675983] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:47,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:47,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501579980] [2024-05-12 13:28:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:47,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:47,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:47,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:47,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 396 transitions, 5377 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:47,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:47,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:47,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:49,532 INFO L124 PetriNetUnfolderBase]: 5946/9966 cut-off events. [2024-05-12 13:28:49,533 INFO L125 PetriNetUnfolderBase]: For 293178/293178 co-relation queries the response was YES. [2024-05-12 13:28:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67139 conditions, 9966 events. 5946/9966 cut-off events. For 293178/293178 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 70967 event pairs, 2256 based on Foata normal form. 1/9709 useless extension candidates. Maximal degree in co-relation 67028. Up to 8429 conditions per place. [2024-05-12 13:28:49,671 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 402 selfloop transitions, 28 changer transitions 0/440 dead transitions. [2024-05-12 13:28:49,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 440 transitions, 6539 flow [2024-05-12 13:28:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-05-12 13:28:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867021276595745 [2024-05-12 13:28:49,672 INFO L175 Difference]: Start difference. First operand has 245 places, 396 transitions, 5377 flow. Second operand 8 states and 183 transitions. [2024-05-12 13:28:49,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 440 transitions, 6539 flow [2024-05-12 13:28:50,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 440 transitions, 6172 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-05-12 13:28:50,445 INFO L231 Difference]: Finished difference. Result has 250 places, 409 transitions, 5281 flow [2024-05-12 13:28:50,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5281, PETRI_PLACES=250, PETRI_TRANSITIONS=409} [2024-05-12 13:28:50,445 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 197 predicate places. [2024-05-12 13:28:50,445 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 409 transitions, 5281 flow [2024-05-12 13:28:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:50,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:50,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:50,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:28:50,446 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:50,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2139374188, now seen corresponding path program 2 times [2024-05-12 13:28:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487377104] [2024-05-12 13:28:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:50,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:51,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:51,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487377104] [2024-05-12 13:28:51,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487377104] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:51,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:51,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058037397] [2024-05-12 13:28:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:51,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:51,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 409 transitions, 5281 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:51,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:51,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:51,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:53,039 INFO L124 PetriNetUnfolderBase]: 5985/9978 cut-off events. [2024-05-12 13:28:53,039 INFO L125 PetriNetUnfolderBase]: For 296458/296464 co-relation queries the response was YES. [2024-05-12 13:28:53,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66896 conditions, 9978 events. 5985/9978 cut-off events. For 296458/296464 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70393 event pairs, 2171 based on Foata normal form. 5/9740 useless extension candidates. Maximal degree in co-relation 66782. Up to 8414 conditions per place. [2024-05-12 13:28:53,171 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 402 selfloop transitions, 45 changer transitions 0/457 dead transitions. [2024-05-12 13:28:53,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 457 transitions, 6583 flow [2024-05-12 13:28:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-05-12 13:28:53,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-05-12 13:28:53,172 INFO L175 Difference]: Start difference. First operand has 250 places, 409 transitions, 5281 flow. Second operand 8 states and 184 transitions. [2024-05-12 13:28:53,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 457 transitions, 6583 flow [2024-05-12 13:28:53,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 457 transitions, 6457 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-05-12 13:28:53,932 INFO L231 Difference]: Finished difference. Result has 257 places, 427 transitions, 5573 flow [2024-05-12 13:28:53,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=257, PETRI_TRANSITIONS=427} [2024-05-12 13:28:53,932 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 204 predicate places. [2024-05-12 13:28:53,933 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 427 transitions, 5573 flow [2024-05-12 13:28:53,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:53,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:53,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:28:53,933 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:53,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2139143548, now seen corresponding path program 3 times [2024-05-12 13:28:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911725818] [2024-05-12 13:28:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911725818] [2024-05-12 13:28:54,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911725818] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:54,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:54,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:54,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108789187] [2024-05-12 13:28:54,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:54,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:54,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:54,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:54,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 427 transitions, 5573 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:54,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:54,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:54,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:28:56,643 INFO L124 PetriNetUnfolderBase]: 6002/9997 cut-off events. [2024-05-12 13:28:56,643 INFO L125 PetriNetUnfolderBase]: For 308489/308495 co-relation queries the response was YES. [2024-05-12 13:28:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68419 conditions, 9997 events. 6002/9997 cut-off events. For 308489/308495 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70453 event pairs, 2169 based on Foata normal form. 5/9760 useless extension candidates. Maximal degree in co-relation 68301. Up to 8437 conditions per place. [2024-05-12 13:28:56,785 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 403 selfloop transitions, 51 changer transitions 0/464 dead transitions. [2024-05-12 13:28:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 464 transitions, 6749 flow [2024-05-12 13:28:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:28:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:28:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-05-12 13:28:56,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867021276595745 [2024-05-12 13:28:56,786 INFO L175 Difference]: Start difference. First operand has 257 places, 427 transitions, 5573 flow. Second operand 8 states and 183 transitions. [2024-05-12 13:28:56,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 464 transitions, 6749 flow [2024-05-12 13:28:57,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 464 transitions, 6539 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-05-12 13:28:57,747 INFO L231 Difference]: Finished difference. Result has 265 places, 435 transitions, 5664 flow [2024-05-12 13:28:57,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5664, PETRI_PLACES=265, PETRI_TRANSITIONS=435} [2024-05-12 13:28:57,748 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 212 predicate places. [2024-05-12 13:28:57,748 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 435 transitions, 5664 flow [2024-05-12 13:28:57,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:57,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:28:57,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:28:57,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:28:57,749 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:28:57,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:28:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2130803308, now seen corresponding path program 4 times [2024-05-12 13:28:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:28:57,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697522867] [2024-05-12 13:28:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:28:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:28:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:28:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:28:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:28:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697522867] [2024-05-12 13:28:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697522867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:28:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:28:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:28:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011071325] [2024-05-12 13:28:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:28:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:28:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:28:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:28:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:28:58,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:28:58,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 435 transitions, 5664 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:28:58,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:28:58,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:28:58,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:00,669 INFO L124 PetriNetUnfolderBase]: 6073/10212 cut-off events. [2024-05-12 13:29:00,669 INFO L125 PetriNetUnfolderBase]: For 322031/322037 co-relation queries the response was YES. [2024-05-12 13:29:00,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70385 conditions, 10212 events. 6073/10212 cut-off events. For 322031/322037 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 73106 event pairs, 2222 based on Foata normal form. 6/9936 useless extension candidates. Maximal degree in co-relation 70263. Up to 8423 conditions per place. [2024-05-12 13:29:00,807 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 424 selfloop transitions, 59 changer transitions 0/493 dead transitions. [2024-05-12 13:29:00,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 493 transitions, 7209 flow [2024-05-12 13:29:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-05-12 13:29:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-05-12 13:29:00,808 INFO L175 Difference]: Start difference. First operand has 265 places, 435 transitions, 5664 flow. Second operand 9 states and 210 transitions. [2024-05-12 13:29:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 493 transitions, 7209 flow [2024-05-12 13:29:01,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 493 transitions, 7051 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-05-12 13:29:01,698 INFO L231 Difference]: Finished difference. Result has 272 places, 454 transitions, 5955 flow [2024-05-12 13:29:01,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=272, PETRI_TRANSITIONS=454} [2024-05-12 13:29:01,698 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 219 predicate places. [2024-05-12 13:29:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 454 transitions, 5955 flow [2024-05-12 13:29:01,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:01,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:01,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:29:01,699 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:01,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1789266210, now seen corresponding path program 1 times [2024-05-12 13:29:01,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:01,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81652178] [2024-05-12 13:29:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:02,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81652178] [2024-05-12 13:29:02,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81652178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:02,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:02,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:02,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602165093] [2024-05-12 13:29:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:02,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:02,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:02,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:02,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 454 transitions, 5955 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:02,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:02,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:02,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:04,329 INFO L124 PetriNetUnfolderBase]: 6254/10406 cut-off events. [2024-05-12 13:29:04,329 INFO L125 PetriNetUnfolderBase]: For 347707/347719 co-relation queries the response was YES. [2024-05-12 13:29:04,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73373 conditions, 10406 events. 6254/10406 cut-off events. For 347707/347719 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 73655 event pairs, 1750 based on Foata normal form. 20/10169 useless extension candidates. Maximal degree in co-relation 73249. Up to 8513 conditions per place. [2024-05-12 13:29:04,486 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 426 selfloop transitions, 70 changer transitions 0/506 dead transitions. [2024-05-12 13:29:04,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 506 transitions, 7259 flow [2024-05-12 13:29:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 13:29:04,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-05-12 13:29:04,487 INFO L175 Difference]: Start difference. First operand has 272 places, 454 transitions, 5955 flow. Second operand 9 states and 225 transitions. [2024-05-12 13:29:04,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 506 transitions, 7259 flow [2024-05-12 13:29:05,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 506 transitions, 7132 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-05-12 13:29:05,471 INFO L231 Difference]: Finished difference. Result has 278 places, 460 transitions, 6109 flow [2024-05-12 13:29:05,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6109, PETRI_PLACES=278, PETRI_TRANSITIONS=460} [2024-05-12 13:29:05,471 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 225 predicate places. [2024-05-12 13:29:05,471 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 460 transitions, 6109 flow [2024-05-12 13:29:05,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:05,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:05,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:29:05,472 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:05,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1203153950, now seen corresponding path program 2 times [2024-05-12 13:29:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:05,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534007694] [2024-05-12 13:29:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:06,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534007694] [2024-05-12 13:29:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534007694] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:06,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:06,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:06,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296315688] [2024-05-12 13:29:06,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:06,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:06,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:06,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:06,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:06,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 460 transitions, 6109 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:06,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:06,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:06,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:08,207 INFO L124 PetriNetUnfolderBase]: 6410/10645 cut-off events. [2024-05-12 13:29:08,207 INFO L125 PetriNetUnfolderBase]: For 373658/373670 co-relation queries the response was YES. [2024-05-12 13:29:08,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76713 conditions, 10645 events. 6410/10645 cut-off events. For 373658/373670 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 75428 event pairs, 1807 based on Foata normal form. 22/10410 useless extension candidates. Maximal degree in co-relation 76586. Up to 8681 conditions per place. [2024-05-12 13:29:08,366 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 423 selfloop transitions, 74 changer transitions 0/507 dead transitions. [2024-05-12 13:29:08,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 507 transitions, 7413 flow [2024-05-12 13:29:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:29:08,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-05-12 13:29:08,367 INFO L175 Difference]: Start difference. First operand has 278 places, 460 transitions, 6109 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:29:08,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 507 transitions, 7413 flow [2024-05-12 13:29:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 507 transitions, 7207 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-05-12 13:29:09,408 INFO L231 Difference]: Finished difference. Result has 282 places, 462 transitions, 6143 flow [2024-05-12 13:29:09,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5903, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6143, PETRI_PLACES=282, PETRI_TRANSITIONS=462} [2024-05-12 13:29:09,410 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 229 predicate places. [2024-05-12 13:29:09,410 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 462 transitions, 6143 flow [2024-05-12 13:29:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:09,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:09,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:29:09,410 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:09,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1297871932, now seen corresponding path program 3 times [2024-05-12 13:29:09,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819020074] [2024-05-12 13:29:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:10,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819020074] [2024-05-12 13:29:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819020074] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:10,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:10,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030994987] [2024-05-12 13:29:10,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:10,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:10,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:10,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 462 transitions, 6143 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:10,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:10,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:10,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:12,121 INFO L124 PetriNetUnfolderBase]: 6716/11196 cut-off events. [2024-05-12 13:29:12,121 INFO L125 PetriNetUnfolderBase]: For 387305/387317 co-relation queries the response was YES. [2024-05-12 13:29:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79491 conditions, 11196 events. 6716/11196 cut-off events. For 387305/387317 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 79968 event pairs, 1620 based on Foata normal form. 20/10935 useless extension candidates. Maximal degree in co-relation 79363. Up to 8968 conditions per place. [2024-05-12 13:29:12,282 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 434 selfloop transitions, 82 changer transitions 0/526 dead transitions. [2024-05-12 13:29:12,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 526 transitions, 7609 flow [2024-05-12 13:29:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:29:12,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-05-12 13:29:12,283 INFO L175 Difference]: Start difference. First operand has 282 places, 462 transitions, 6143 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:29:12,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 526 transitions, 7609 flow [2024-05-12 13:29:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 526 transitions, 7386 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-05-12 13:29:13,777 INFO L231 Difference]: Finished difference. Result has 285 places, 480 transitions, 6380 flow [2024-05-12 13:29:13,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6380, PETRI_PLACES=285, PETRI_TRANSITIONS=480} [2024-05-12 13:29:13,778 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 232 predicate places. [2024-05-12 13:29:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 480 transitions, 6380 flow [2024-05-12 13:29:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:29:13,779 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1203142046, now seen corresponding path program 1 times [2024-05-12 13:29:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760263551] [2024-05-12 13:29:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760263551] [2024-05-12 13:29:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760263551] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:29:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904623239] [2024-05-12 13:29:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:29:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:29:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:29:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:14,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 480 transitions, 6380 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:14,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:14,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:17,294 INFO L124 PetriNetUnfolderBase]: 6780/11342 cut-off events. [2024-05-12 13:29:17,294 INFO L125 PetriNetUnfolderBase]: For 399095/399107 co-relation queries the response was YES. [2024-05-12 13:29:17,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82905 conditions, 11342 events. 6780/11342 cut-off events. For 399095/399107 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 81568 event pairs, 1912 based on Foata normal form. 12/11060 useless extension candidates. Maximal degree in co-relation 82774. Up to 9271 conditions per place. [2024-05-12 13:29:17,434 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 438 selfloop transitions, 108 changer transitions 0/556 dead transitions. [2024-05-12 13:29:17,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 556 transitions, 8327 flow [2024-05-12 13:29:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:29:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:29:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-05-12 13:29:17,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234042553191489 [2024-05-12 13:29:17,435 INFO L175 Difference]: Start difference. First operand has 285 places, 480 transitions, 6380 flow. Second operand 10 states and 246 transitions. [2024-05-12 13:29:17,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 556 transitions, 8327 flow [2024-05-12 13:29:18,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 556 transitions, 8116 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-05-12 13:29:18,599 INFO L231 Difference]: Finished difference. Result has 293 places, 508 transitions, 7129 flow [2024-05-12 13:29:18,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7129, PETRI_PLACES=293, PETRI_TRANSITIONS=508} [2024-05-12 13:29:18,600 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 240 predicate places. [2024-05-12 13:29:18,600 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 508 transitions, 7129 flow [2024-05-12 13:29:18,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:18,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:18,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:29:18,600 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:18,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -883518488, now seen corresponding path program 4 times [2024-05-12 13:29:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366128697] [2024-05-12 13:29:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366128697] [2024-05-12 13:29:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366128697] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:19,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:19,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842391326] [2024-05-12 13:29:19,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:19,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:19,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 508 transitions, 7129 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:19,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:19,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:19,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:22,261 INFO L124 PetriNetUnfolderBase]: 7417/12389 cut-off events. [2024-05-12 13:29:22,261 INFO L125 PetriNetUnfolderBase]: For 442033/442045 co-relation queries the response was YES. [2024-05-12 13:29:22,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90268 conditions, 12389 events. 7417/12389 cut-off events. For 442033/442045 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89789 event pairs, 2024 based on Foata normal form. 20/12089 useless extension candidates. Maximal degree in co-relation 90133. Up to 9800 conditions per place. [2024-05-12 13:29:22,421 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 481 selfloop transitions, 86 changer transitions 0/577 dead transitions. [2024-05-12 13:29:22,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 577 transitions, 8787 flow [2024-05-12 13:29:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:29:22,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-05-12 13:29:22,422 INFO L175 Difference]: Start difference. First operand has 293 places, 508 transitions, 7129 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:29:22,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 577 transitions, 8787 flow [2024-05-12 13:29:23,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 577 transitions, 8425 flow, removed 150 selfloop flow, removed 3 redundant places. [2024-05-12 13:29:23,816 INFO L231 Difference]: Finished difference. Result has 300 places, 532 transitions, 7325 flow [2024-05-12 13:29:23,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7325, PETRI_PLACES=300, PETRI_TRANSITIONS=532} [2024-05-12 13:29:23,816 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 247 predicate places. [2024-05-12 13:29:23,816 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 532 transitions, 7325 flow [2024-05-12 13:29:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:23,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:23,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:23,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:29:23,817 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:23,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1154301898, now seen corresponding path program 5 times [2024-05-12 13:29:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:23,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575196563] [2024-05-12 13:29:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575196563] [2024-05-12 13:29:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575196563] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:24,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:24,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:24,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944111093] [2024-05-12 13:29:24,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:24,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:24,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:24,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:24,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:24,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:24,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 532 transitions, 7325 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:24,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:24,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:24,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:27,584 INFO L124 PetriNetUnfolderBase]: 7729/12907 cut-off events. [2024-05-12 13:29:27,584 INFO L125 PetriNetUnfolderBase]: For 467531/467543 co-relation queries the response was YES. [2024-05-12 13:29:27,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94196 conditions, 12907 events. 7729/12907 cut-off events. For 467531/467543 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 94081 event pairs, 2208 based on Foata normal form. 22/12605 useless extension candidates. Maximal degree in co-relation 94059. Up to 10466 conditions per place. [2024-05-12 13:29:27,772 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 494 selfloop transitions, 76 changer transitions 0/580 dead transitions. [2024-05-12 13:29:27,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 580 transitions, 8846 flow [2024-05-12 13:29:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:29:27,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-05-12 13:29:27,774 INFO L175 Difference]: Start difference. First operand has 300 places, 532 transitions, 7325 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:29:27,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 580 transitions, 8846 flow [2024-05-12 13:29:29,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 580 transitions, 8636 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-05-12 13:29:29,340 INFO L231 Difference]: Finished difference. Result has 303 places, 536 transitions, 7400 flow [2024-05-12 13:29:29,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7115, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7400, PETRI_PLACES=303, PETRI_TRANSITIONS=536} [2024-05-12 13:29:29,340 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 250 predicate places. [2024-05-12 13:29:29,341 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 536 transitions, 7400 flow [2024-05-12 13:29:29,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:29,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:29,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:29,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:29:29,341 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:29,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash -866520838, now seen corresponding path program 6 times [2024-05-12 13:29:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715635021] [2024-05-12 13:29:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:30,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:30,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715635021] [2024-05-12 13:29:30,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715635021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:30,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:30,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:30,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126995026] [2024-05-12 13:29:30,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:30,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:30,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:30,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:30,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 536 transitions, 7400 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:30,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:30,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:30,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:33,154 INFO L124 PetriNetUnfolderBase]: 7885/13246 cut-off events. [2024-05-12 13:29:33,155 INFO L125 PetriNetUnfolderBase]: For 488228/488234 co-relation queries the response was YES. [2024-05-12 13:29:33,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96435 conditions, 13246 events. 7885/13246 cut-off events. For 488228/488234 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 97568 event pairs, 2201 based on Foata normal form. 16/12912 useless extension candidates. Maximal degree in co-relation 96297. Up to 10587 conditions per place. [2024-05-12 13:29:33,352 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 480 selfloop transitions, 92 changer transitions 0/582 dead transitions. [2024-05-12 13:29:33,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 582 transitions, 8943 flow [2024-05-12 13:29:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 13:29:33,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-05-12 13:29:33,353 INFO L175 Difference]: Start difference. First operand has 303 places, 536 transitions, 7400 flow. Second operand 9 states and 222 transitions. [2024-05-12 13:29:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 582 transitions, 8943 flow [2024-05-12 13:29:34,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 582 transitions, 8748 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-05-12 13:29:34,949 INFO L231 Difference]: Finished difference. Result has 306 places, 538 transitions, 7499 flow [2024-05-12 13:29:34,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7499, PETRI_PLACES=306, PETRI_TRANSITIONS=538} [2024-05-12 13:29:34,949 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 253 predicate places. [2024-05-12 13:29:34,949 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 538 transitions, 7499 flow [2024-05-12 13:29:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:34,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:29:34,950 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:34,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1375724914, now seen corresponding path program 1 times [2024-05-12 13:29:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686485550] [2024-05-12 13:29:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:35,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:35,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686485550] [2024-05-12 13:29:35,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686485550] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:35,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:35,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472160998] [2024-05-12 13:29:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:35,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:35,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 538 transitions, 7499 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:35,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:35,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:35,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:38,880 INFO L124 PetriNetUnfolderBase]: 7975/13380 cut-off events. [2024-05-12 13:29:38,880 INFO L125 PetriNetUnfolderBase]: For 474788/474794 co-relation queries the response was YES. [2024-05-12 13:29:39,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97172 conditions, 13380 events. 7975/13380 cut-off events. For 474788/474794 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 98449 event pairs, 2340 based on Foata normal form. 6/13030 useless extension candidates. Maximal degree in co-relation 97033. Up to 11099 conditions per place. [2024-05-12 13:29:39,095 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 512 selfloop transitions, 74 changer transitions 0/596 dead transitions. [2024-05-12 13:29:39,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 596 transitions, 9154 flow [2024-05-12 13:29:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 13:29:39,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224586288416075 [2024-05-12 13:29:39,097 INFO L175 Difference]: Start difference. First operand has 306 places, 538 transitions, 7499 flow. Second operand 9 states and 221 transitions. [2024-05-12 13:29:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 596 transitions, 9154 flow [2024-05-12 13:29:40,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 596 transitions, 8922 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-05-12 13:29:40,795 INFO L231 Difference]: Finished difference. Result has 311 places, 556 transitions, 7808 flow [2024-05-12 13:29:40,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7267, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7808, PETRI_PLACES=311, PETRI_TRANSITIONS=556} [2024-05-12 13:29:40,795 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 258 predicate places. [2024-05-12 13:29:40,795 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 556 transitions, 7808 flow [2024-05-12 13:29:40,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:40,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:40,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:29:40,795 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:40,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 339352121, now seen corresponding path program 1 times [2024-05-12 13:29:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:40,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809604885] [2024-05-12 13:29:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:41,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:41,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809604885] [2024-05-12 13:29:41,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809604885] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:41,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:41,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:41,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192566612] [2024-05-12 13:29:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:41,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:41,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 556 transitions, 7808 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:41,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:41,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:44,615 INFO L124 PetriNetUnfolderBase]: 8043/13490 cut-off events. [2024-05-12 13:29:44,616 INFO L125 PetriNetUnfolderBase]: For 492252/492258 co-relation queries the response was YES. [2024-05-12 13:29:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99116 conditions, 13490 events. 8043/13490 cut-off events. For 492252/492258 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99444 event pairs, 2313 based on Foata normal form. 8/13138 useless extension candidates. Maximal degree in co-relation 98974. Up to 11206 conditions per place. [2024-05-12 13:29:44,810 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 520 selfloop transitions, 69 changer transitions 0/599 dead transitions. [2024-05-12 13:29:44,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 599 transitions, 9307 flow [2024-05-12 13:29:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-05-12 13:29:44,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200945626477541 [2024-05-12 13:29:44,812 INFO L175 Difference]: Start difference. First operand has 311 places, 556 transitions, 7808 flow. Second operand 9 states and 220 transitions. [2024-05-12 13:29:44,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 599 transitions, 9307 flow [2024-05-12 13:29:46,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 599 transitions, 9081 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-05-12 13:29:46,546 INFO L231 Difference]: Finished difference. Result has 315 places, 560 transitions, 7836 flow [2024-05-12 13:29:46,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7836, PETRI_PLACES=315, PETRI_TRANSITIONS=560} [2024-05-12 13:29:46,547 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 262 predicate places. [2024-05-12 13:29:46,547 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 560 transitions, 7836 flow [2024-05-12 13:29:46,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:46,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:46,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:29:46,547 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:46,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash -866397489, now seen corresponding path program 2 times [2024-05-12 13:29:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:46,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639107939] [2024-05-12 13:29:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:47,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639107939] [2024-05-12 13:29:47,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639107939] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:47,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:47,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:47,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462653235] [2024-05-12 13:29:47,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:47,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 560 transitions, 7836 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:47,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:47,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:50,485 INFO L124 PetriNetUnfolderBase]: 8191/13759 cut-off events. [2024-05-12 13:29:50,485 INFO L125 PetriNetUnfolderBase]: For 520173/520179 co-relation queries the response was YES. [2024-05-12 13:29:50,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101815 conditions, 13759 events. 8191/13759 cut-off events. For 520173/520179 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 101854 event pairs, 2268 based on Foata normal form. 8/13398 useless extension candidates. Maximal degree in co-relation 101672. Up to 10662 conditions per place. [2024-05-12 13:29:50,701 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 481 selfloop transitions, 120 changer transitions 0/611 dead transitions. [2024-05-12 13:29:50,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 611 transitions, 9786 flow [2024-05-12 13:29:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:50,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 13:29:50,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295508274231678 [2024-05-12 13:29:50,702 INFO L175 Difference]: Start difference. First operand has 315 places, 560 transitions, 7836 flow. Second operand 9 states and 224 transitions. [2024-05-12 13:29:50,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 611 transitions, 9786 flow [2024-05-12 13:29:52,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 611 transitions, 9601 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-05-12 13:29:52,512 INFO L231 Difference]: Finished difference. Result has 317 places, 568 transitions, 8118 flow [2024-05-12 13:29:52,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7651, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8118, PETRI_PLACES=317, PETRI_TRANSITIONS=568} [2024-05-12 13:29:52,513 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 264 predicate places. [2024-05-12 13:29:52,513 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 568 transitions, 8118 flow [2024-05-12 13:29:52,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:52,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:52,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:29:52,513 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:52,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -866130579, now seen corresponding path program 3 times [2024-05-12 13:29:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524160107] [2024-05-12 13:29:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524160107] [2024-05-12 13:29:53,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524160107] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:53,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:53,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:29:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448099452] [2024-05-12 13:29:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:29:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:29:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:29:53,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:53,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 568 transitions, 8118 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:53,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:53,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:53,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:29:56,640 INFO L124 PetriNetUnfolderBase]: 8179/13653 cut-off events. [2024-05-12 13:29:56,641 INFO L125 PetriNetUnfolderBase]: For 517788/517794 co-relation queries the response was YES. [2024-05-12 13:29:56,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101657 conditions, 13653 events. 8179/13653 cut-off events. For 517788/517794 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 100241 event pairs, 2176 based on Foata normal form. 8/13312 useless extension candidates. Maximal degree in co-relation 101513. Up to 10654 conditions per place. [2024-05-12 13:29:56,833 INFO L140 encePairwiseOnDemand]: 31/47 looper letters, 477 selfloop transitions, 123 changer transitions 0/610 dead transitions. [2024-05-12 13:29:56,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 610 transitions, 9724 flow [2024-05-12 13:29:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:29:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:29:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 13:29:56,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-05-12 13:29:56,834 INFO L175 Difference]: Start difference. First operand has 317 places, 568 transitions, 8118 flow. Second operand 9 states and 222 transitions. [2024-05-12 13:29:56,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 610 transitions, 9724 flow [2024-05-12 13:29:58,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 610 transitions, 9450 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-05-12 13:29:58,538 INFO L231 Difference]: Finished difference. Result has 321 places, 568 transitions, 8102 flow [2024-05-12 13:29:58,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7844, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8102, PETRI_PLACES=321, PETRI_TRANSITIONS=568} [2024-05-12 13:29:58,538 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 268 predicate places. [2024-05-12 13:29:58,538 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 568 transitions, 8102 flow [2024-05-12 13:29:58,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:58,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:29:58,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:29:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:29:58,539 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:29:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:29:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1499042930, now seen corresponding path program 2 times [2024-05-12 13:29:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:29:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150637634] [2024-05-12 13:29:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:29:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:29:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:29:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:29:59,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:29:59,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150637634] [2024-05-12 13:29:59,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150637634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:29:59,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:29:59,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:29:59,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848310620] [2024-05-12 13:29:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:29:59,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:29:59,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:29:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:29:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:29:59,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-05-12 13:29:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 568 transitions, 8102 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:29:59,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:29:59,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-05-12 13:29:59,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:30:02,838 INFO L124 PetriNetUnfolderBase]: 8297/13906 cut-off events. [2024-05-12 13:30:02,838 INFO L125 PetriNetUnfolderBase]: For 529050/529062 co-relation queries the response was YES. [2024-05-12 13:30:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102798 conditions, 13906 events. 8297/13906 cut-off events. For 529050/529062 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 102852 event pairs, 2356 based on Foata normal form. 12/13542 useless extension candidates. Maximal degree in co-relation 102653. Up to 11420 conditions per place. [2024-05-12 13:30:03,046 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 519 selfloop transitions, 122 changer transitions 0/651 dead transitions. [2024-05-12 13:30:03,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 651 transitions, 10370 flow [2024-05-12 13:30:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:30:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:30:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-05-12 13:30:03,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-05-12 13:30:03,047 INFO L175 Difference]: Start difference. First operand has 321 places, 568 transitions, 8102 flow. Second operand 10 states and 245 transitions. [2024-05-12 13:30:03,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 651 transitions, 10370 flow [2024-05-12 13:30:04,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 651 transitions, 10157 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 13:30:04,875 INFO L231 Difference]: Finished difference. Result has 328 places, 605 transitions, 9070 flow [2024-05-12 13:30:04,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9070, PETRI_PLACES=328, PETRI_TRANSITIONS=605} [2024-05-12 13:30:04,875 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 275 predicate places. [2024-05-12 13:30:04,875 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 605 transitions, 9070 flow [2024-05-12 13:30:04,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:30:04,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:30:04,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:30:04,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:30:04,876 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:30:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:30:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash -866134144, now seen corresponding path program 3 times [2024-05-12 13:30:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:30:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599548665] [2024-05-12 13:30:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:30:04,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:30:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat