./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix050.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix050.i ./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:34:26,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:34:26,841 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:34:26,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:34:26,845 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:34:26,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:34:26,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:34:26,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:34:26,870 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:34:26,873 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:34:26,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:34:26,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:34:26,875 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:34:26,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:34:26,876 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:34:26,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:34:26,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:34:26,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:34:26,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:34:26,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:34:26,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:34:26,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:34:26,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:34:26,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:34:26,878 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:34:26,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:34:26,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:34:26,879 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:34:26,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:34:26,879 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:34:26,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:34:26,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:34:26,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:34:26,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:34:26,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:34:26,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:34:26,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:34:26,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:34:26,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:34:26,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:34:26,882 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:34:26,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:34:26,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:34:26,883 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:34:27,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:34:27,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:34:27,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:34:27,100 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:34:27,101 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:34:27,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-27 20:34:28,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:34:28,406 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:34:28,406 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix050.i [2024-06-27 20:34:28,417 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90c4dbab/7875771f5c0846d6bd6baaf740a38cd3/FLAG80f835d3f [2024-06-27 20:34:28,442 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e90c4dbab/7875771f5c0846d6bd6baaf740a38cd3 [2024-06-27 20:34:28,444 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:34:28,445 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:34:28,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix050.yml/witness.yml [2024-06-27 20:34:28,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:34:28,638 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:34:28,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:34:28,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:34:28,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:34:28,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:34:28" (1/2) ... [2024-06-27 20:34:28,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c67b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:34:28, skipping insertion in model container [2024-06-27 20:34:28,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:34:28" (1/2) ... [2024-06-27 20:34:28,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@368f37da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:34:28, skipping insertion in model container [2024-06-27 20:34:28,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:34:28" (2/2) ... [2024-06-27 20:34:28,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c67b70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:28, skipping insertion in model container [2024-06-27 20:34:28,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:34:28" (2/2) ... [2024-06-27 20:34:28,647 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:34:28,748 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:34:28,749 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:34:28,750 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:34:28,750 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:34:28,750 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-27 20:34:28,750 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:34:28,751 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-27 20:34:28,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:34:29,102 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:34:29,113 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:34:29,263 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:34:29,303 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:34:29,304 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29 WrapperNode [2024-06-27 20:34:29,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:34:29,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:34:29,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:34:29,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:34:29,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,409 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-27 20:34:29,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:34:29,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:34:29,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:34:29,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:34:29,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,483 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:34:29,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:34:29,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:34:29,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:34:29,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:34:29,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (1/1) ... [2024-06-27 20:34:29,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:34:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:34:29,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:34:29,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:34:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:34:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:34:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:34:29,568 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:34:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:34:29,568 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:34:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:34:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:34:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:34:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:34:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:34:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:34:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:34:29,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:34:29,570 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:34:29,669 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:34:29,670 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:34:30,049 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:34:30,049 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:34:30,188 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:34:30,189 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:34:30,189 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:34:30 BoogieIcfgContainer [2024-06-27 20:34:30,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:34:30,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:34:30,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:34:30,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:34:30,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:34:28" (1/4) ... [2024-06-27 20:34:30,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4250fdf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:34:30, skipping insertion in model container [2024-06-27 20:34:30,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:34:28" (2/4) ... [2024-06-27 20:34:30,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4250fdf3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:34:30, skipping insertion in model container [2024-06-27 20:34:30,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:34:29" (3/4) ... [2024-06-27 20:34:30,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4250fdf3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:34:30, skipping insertion in model container [2024-06-27 20:34:30,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:34:30" (4/4) ... [2024-06-27 20:34:30,199 INFO L112 eAbstractionObserver]: Analyzing ICFG mix050.i [2024-06-27 20:34:30,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:34:30,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:34:30,213 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:34:30,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:34:30,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 20:34:30,339 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-27 20:34:30,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:34:30,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:34:30,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 20:34:30,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-27 20:34:30,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:34:30,363 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;@58ad3f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:34:30,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:34:30,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:34:30,367 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:34:30,367 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:34:30,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:30,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:34:30,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 406042836, now seen corresponding path program 1 times [2024-06-27 20:34:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486791681] [2024-06-27 20:34:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:31,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:31,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486791681] [2024-06-27 20:34:31,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486791681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:31,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:31,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:34:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916774036] [2024-06-27 20:34:31,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:34:31,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:34:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:34:31,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 20:34:31,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:31,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:31,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 20:34:31,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:32,570 INFO L124 PetriNetUnfolderBase]: 7892/10907 cut-off events. [2024-06-27 20:34:32,570 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-06-27 20:34:32,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21984 conditions, 10907 events. 7892/10907 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 57580 event pairs, 6010 based on Foata normal form. 1/10753 useless extension candidates. Maximal degree in co-relation 21971. Up to 10748 conditions per place. [2024-06-27 20:34:32,630 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-27 20:34:32,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-27 20:34:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:34:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:34:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 20:34:32,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 20:34:32,641 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 96 transitions. [2024-06-27 20:34:32,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-27 20:34:32,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:32,649 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-27 20:34:32,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 20:34:32,653 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-27 20:34:32,653 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-27 20:34:32,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:32,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:32,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:34:32,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -634804941, now seen corresponding path program 1 times [2024-06-27 20:34:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707700045] [2024-06-27 20:34:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:33,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707700045] [2024-06-27 20:34:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707700045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:33,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:33,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:34:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716040564] [2024-06-27 20:34:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:33,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:34:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:34:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:34:33,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 20:34:33,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:33,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:33,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 20:34:33,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:34,515 INFO L124 PetriNetUnfolderBase]: 7882/10904 cut-off events. [2024-06-27 20:34:34,516 INFO L125 PetriNetUnfolderBase]: For 2124/2124 co-relation queries the response was YES. [2024-06-27 20:34:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24942 conditions, 10904 events. 7882/10904 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 57610 event pairs, 5323 based on Foata normal form. 4/10905 useless extension candidates. Maximal degree in co-relation 24930. Up to 10713 conditions per place. [2024-06-27 20:34:34,575 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-27 20:34:34,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-27 20:34:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:34:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:34:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 20:34:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-27 20:34:34,579 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 125 transitions. [2024-06-27 20:34:34,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-27 20:34:34,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:34:34,583 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-27 20:34:34,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 20:34:34,584 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-27 20:34:34,584 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-27 20:34:34,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:34,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:34,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:34:34,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:34,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -162136686, now seen corresponding path program 1 times [2024-06-27 20:34:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69994489] [2024-06-27 20:34:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69994489] [2024-06-27 20:34:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69994489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:35,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:34:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404081758] [2024-06-27 20:34:35,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:35,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:34:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:35,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:34:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:34:35,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:34:35,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:35,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:35,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:34:35,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:37,001 INFO L124 PetriNetUnfolderBase]: 9557/13165 cut-off events. [2024-06-27 20:34:37,001 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-27 20:34:37,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33404 conditions, 13165 events. 9557/13165 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69864 event pairs, 5407 based on Foata normal form. 4/13166 useless extension candidates. Maximal degree in co-relation 33390. Up to 12912 conditions per place. [2024-06-27 20:34:37,083 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 73 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2024-06-27 20:34:37,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 504 flow [2024-06-27 20:34:37,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:34:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:34:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-27 20:34:37,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816993464052288 [2024-06-27 20:34:37,089 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 6 states and 178 transitions. [2024-06-27 20:34:37,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 504 flow [2024-06-27 20:34:37,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 476 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:34:37,094 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 254 flow [2024-06-27 20:34:37,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-27 20:34:37,096 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 20:34:37,096 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 254 flow [2024-06-27 20:34:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:37,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:37,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:34:37,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:37,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1843571480, now seen corresponding path program 1 times [2024-06-27 20:34:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:37,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209743193] [2024-06-27 20:34:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:37,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:38,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:38,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209743193] [2024-06-27 20:34:38,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209743193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:38,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:38,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:34:38,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117596643] [2024-06-27 20:34:38,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:34:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:34:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:34:38,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-27 20:34:38,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:38,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-27 20:34:38,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:39,504 INFO L124 PetriNetUnfolderBase]: 9541/13143 cut-off events. [2024-06-27 20:34:39,505 INFO L125 PetriNetUnfolderBase]: For 14290/14290 co-relation queries the response was YES. [2024-06-27 20:34:39,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37268 conditions, 13143 events. 9541/13143 cut-off events. For 14290/14290 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69851 event pairs, 4602 based on Foata normal form. 8/13148 useless extension candidates. Maximal degree in co-relation 37252. Up to 12846 conditions per place. [2024-06-27 20:34:39,579 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-27 20:34:39,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 594 flow [2024-06-27 20:34:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 20:34:39,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658263305322129 [2024-06-27 20:34:39,581 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 254 flow. Second operand 7 states and 202 transitions. [2024-06-27 20:34:39,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 594 flow [2024-06-27 20:34:39,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 107 transitions, 555 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:39,590 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 287 flow [2024-06-27 20:34:39,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 20:34:39,591 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-06-27 20:34:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 287 flow [2024-06-27 20:34:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:39,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:39,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:34:39,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:39,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1884147086, now seen corresponding path program 1 times [2024-06-27 20:34:39,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:39,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407174192] [2024-06-27 20:34:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:39,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:40,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:40,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407174192] [2024-06-27 20:34:40,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407174192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:40,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:40,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:34:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357567776] [2024-06-27 20:34:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:34:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:34:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:34:40,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:40,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:40,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:40,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:40,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:41,578 INFO L124 PetriNetUnfolderBase]: 9523/13167 cut-off events. [2024-06-27 20:34:41,584 INFO L125 PetriNetUnfolderBase]: For 22227/22227 co-relation queries the response was YES. [2024-06-27 20:34:41,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39998 conditions, 13167 events. 9523/13167 cut-off events. For 22227/22227 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70093 event pairs, 4907 based on Foata normal form. 6/13170 useless extension candidates. Maximal degree in co-relation 39980. Up to 12897 conditions per place. [2024-06-27 20:34:41,660 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 65 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-27 20:34:41,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 509 flow [2024-06-27 20:34:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:34:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:34:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 20:34:41,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-06-27 20:34:41,662 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 287 flow. Second operand 5 states and 123 transitions. [2024-06-27 20:34:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 509 flow [2024-06-27 20:34:41,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 455 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:41,667 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 298 flow [2024-06-27 20:34:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-27 20:34:41,668 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-06-27 20:34:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 298 flow [2024-06-27 20:34:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:41,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:34:41,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -151020639, now seen corresponding path program 1 times [2024-06-27 20:34:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309695930] [2024-06-27 20:34:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309695930] [2024-06-27 20:34:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309695930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:34:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099133653] [2024-06-27 20:34:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:34:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:34:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:34:42,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:42,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:42,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:42,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:43,552 INFO L124 PetriNetUnfolderBase]: 9598/13262 cut-off events. [2024-06-27 20:34:43,553 INFO L125 PetriNetUnfolderBase]: For 31479/31479 co-relation queries the response was YES. [2024-06-27 20:34:43,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43575 conditions, 13262 events. 9598/13262 cut-off events. For 31479/31479 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70566 event pairs, 4669 based on Foata normal form. 6/13263 useless extension candidates. Maximal degree in co-relation 43555. Up to 12924 conditions per place. [2024-06-27 20:34:43,639 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 20:34:43,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 709 flow [2024-06-27 20:34:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:34:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:34:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 20:34:43,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2024-06-27 20:34:43,641 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 298 flow. Second operand 6 states and 155 transitions. [2024-06-27 20:34:43,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 709 flow [2024-06-27 20:34:43,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 107 transitions, 655 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:43,647 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 420 flow [2024-06-27 20:34:43,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-27 20:34:43,647 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 20:34:43,648 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 420 flow [2024-06-27 20:34:43,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:43,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:43,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:43,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:34:43,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:43,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1166465181, now seen corresponding path program 2 times [2024-06-27 20:34:43,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:43,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663202750] [2024-06-27 20:34:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:44,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663202750] [2024-06-27 20:34:44,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663202750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:44,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:44,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:34:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124991223] [2024-06-27 20:34:44,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:44,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:34:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:34:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:34:44,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:44,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:44,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:44,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:44,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:45,971 INFO L124 PetriNetUnfolderBase]: 9580/13243 cut-off events. [2024-06-27 20:34:45,971 INFO L125 PetriNetUnfolderBase]: For 43724/43724 co-relation queries the response was YES. [2024-06-27 20:34:45,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47546 conditions, 13243 events. 9580/13243 cut-off events. For 43724/43724 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70466 event pairs, 4762 based on Foata normal form. 6/13246 useless extension candidates. Maximal degree in co-relation 47524. Up to 12960 conditions per place. [2024-06-27 20:34:46,052 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 20:34:46,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 674 flow [2024-06-27 20:34:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:34:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:34:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 20:34:46,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-06-27 20:34:46,055 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 420 flow. Second operand 6 states and 146 transitions. [2024-06-27 20:34:46,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 674 flow [2024-06-27 20:34:46,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 628 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 20:34:46,082 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 413 flow [2024-06-27 20:34:46,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 20:34:46,083 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-27 20:34:46,083 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 413 flow [2024-06-27 20:34:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:46,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:46,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:34:46,084 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 125598203, now seen corresponding path program 1 times [2024-06-27 20:34:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:46,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110541597] [2024-06-27 20:34:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:46,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:47,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:47,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110541597] [2024-06-27 20:34:47,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110541597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:47,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:47,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936410039] [2024-06-27 20:34:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:47,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:47,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:47,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:48,443 INFO L124 PetriNetUnfolderBase]: 9624/13280 cut-off events. [2024-06-27 20:34:48,443 INFO L125 PetriNetUnfolderBase]: For 49768/49768 co-relation queries the response was YES. [2024-06-27 20:34:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48250 conditions, 13280 events. 9624/13280 cut-off events. For 49768/49768 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70374 event pairs, 4668 based on Foata normal form. 6/13283 useless extension candidates. Maximal degree in co-relation 48225. Up to 12993 conditions per place. [2024-06-27 20:34:48,518 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 93 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-27 20:34:48,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 773 flow [2024-06-27 20:34:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 20:34:48,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-27 20:34:48,520 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 413 flow. Second operand 7 states and 175 transitions. [2024-06-27 20:34:48,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 773 flow [2024-06-27 20:34:48,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 117 transitions, 726 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:48,541 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 459 flow [2024-06-27 20:34:48,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 20:34:48,541 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-27 20:34:48,542 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 459 flow [2024-06-27 20:34:48,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:48,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:48,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:48,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:34:48,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:48,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1149943319, now seen corresponding path program 2 times [2024-06-27 20:34:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987824289] [2024-06-27 20:34:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:49,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:49,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987824289] [2024-06-27 20:34:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987824289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:49,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:49,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121232351] [2024-06-27 20:34:49,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:49,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:49,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:49,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:50,727 INFO L124 PetriNetUnfolderBase]: 9699/13382 cut-off events. [2024-06-27 20:34:50,728 INFO L125 PetriNetUnfolderBase]: For 64147/64147 co-relation queries the response was YES. [2024-06-27 20:34:50,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52089 conditions, 13382 events. 9699/13382 cut-off events. For 64147/64147 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70916 event pairs, 4479 based on Foata normal form. 6/13383 useless extension candidates. Maximal degree in co-relation 52065. Up to 12935 conditions per place. [2024-06-27 20:34:50,803 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 86 selfloop transitions, 35 changer transitions 0/127 dead transitions. [2024-06-27 20:34:50,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 947 flow [2024-06-27 20:34:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 20:34:50,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-27 20:34:50,805 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 459 flow. Second operand 7 states and 181 transitions. [2024-06-27 20:34:50,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 947 flow [2024-06-27 20:34:50,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 127 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:50,825 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 579 flow [2024-06-27 20:34:50,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-27 20:34:50,827 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-27 20:34:50,827 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 579 flow [2024-06-27 20:34:50,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:50,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:50,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:50,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:34:50,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1836430277, now seen corresponding path program 3 times [2024-06-27 20:34:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:50,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509728404] [2024-06-27 20:34:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:50,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509728404] [2024-06-27 20:34:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509728404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:51,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707755259] [2024-06-27 20:34:51,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:51,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:51,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:51,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:51,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:51,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:51,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:52,933 INFO L124 PetriNetUnfolderBase]: 9681/13363 cut-off events. [2024-06-27 20:34:52,933 INFO L125 PetriNetUnfolderBase]: For 81727/81727 co-relation queries the response was YES. [2024-06-27 20:34:52,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55284 conditions, 13363 events. 9681/13363 cut-off events. For 81727/81727 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 70828 event pairs, 4675 based on Foata normal form. 6/13366 useless extension candidates. Maximal degree in co-relation 55259. Up to 13060 conditions per place. [2024-06-27 20:34:53,035 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 96 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-27 20:34:53,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 895 flow [2024-06-27 20:34:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 20:34:53,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:34:53,037 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 579 flow. Second operand 7 states and 170 transitions. [2024-06-27 20:34:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 895 flow [2024-06-27 20:34:53,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 811 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:53,077 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 542 flow [2024-06-27 20:34:53,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-27 20:34:53,077 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-27 20:34:53,078 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 542 flow [2024-06-27 20:34:53,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:53,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:53,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:34:53,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 303095957, now seen corresponding path program 1 times [2024-06-27 20:34:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:53,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206564119] [2024-06-27 20:34:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:53,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:54,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206564119] [2024-06-27 20:34:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206564119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:54,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204094624] [2024-06-27 20:34:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:54,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:54,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:54,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:54,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:54,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:34:54,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 542 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:54,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:54,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:34:54,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:56,008 INFO L124 PetriNetUnfolderBase]: 11757/16149 cut-off events. [2024-06-27 20:34:56,009 INFO L125 PetriNetUnfolderBase]: For 108268/108268 co-relation queries the response was YES. [2024-06-27 20:34:56,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66383 conditions, 16149 events. 11757/16149 cut-off events. For 108268/108268 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 85614 event pairs, 5699 based on Foata normal form. 6/16152 useless extension candidates. Maximal degree in co-relation 66356. Up to 15837 conditions per place. [2024-06-27 20:34:56,123 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 101 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-27 20:34:56,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 941 flow [2024-06-27 20:34:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 20:34:56,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-27 20:34:56,125 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 542 flow. Second operand 7 states and 163 transitions. [2024-06-27 20:34:56,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 941 flow [2024-06-27 20:34:56,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 126 transitions, 875 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:56,178 INFO L231 Difference]: Finished difference. Result has 82 places, 94 transitions, 614 flow [2024-06-27 20:34:56,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=82, PETRI_TRANSITIONS=94} [2024-06-27 20:34:56,178 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 28 predicate places. [2024-06-27 20:34:56,178 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 94 transitions, 614 flow [2024-06-27 20:34:56,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:56,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:56,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:56,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:34:56,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:56,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash -476256706, now seen corresponding path program 1 times [2024-06-27 20:34:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:56,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889313729] [2024-06-27 20:34:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:56,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:56,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889313729] [2024-06-27 20:34:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889313729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:56,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:56,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:34:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892520521] [2024-06-27 20:34:56,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:34:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:34:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:34:56,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:56,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 94 transitions, 614 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:56,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:58,250 INFO L124 PetriNetUnfolderBase]: 11135/15454 cut-off events. [2024-06-27 20:34:58,250 INFO L125 PetriNetUnfolderBase]: For 125299/125305 co-relation queries the response was YES. [2024-06-27 20:34:58,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67731 conditions, 15454 events. 11135/15454 cut-off events. For 125299/125305 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83225 event pairs, 5731 based on Foata normal form. 10/15425 useless extension candidates. Maximal degree in co-relation 67702. Up to 15072 conditions per place. [2024-06-27 20:34:58,374 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 94 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2024-06-27 20:34:58,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 900 flow [2024-06-27 20:34:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:34:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:34:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:34:58,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 20:34:58,377 INFO L175 Difference]: Start difference. First operand has 82 places, 94 transitions, 614 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:34:58,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 900 flow [2024-06-27 20:34:58,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 830 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:58,443 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 621 flow [2024-06-27 20:34:58,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=621, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-27 20:34:58,444 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 29 predicate places. [2024-06-27 20:34:58,444 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 621 flow [2024-06-27 20:34:58,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:58,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:58,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:58,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:34:58,445 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:34:58,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:58,445 INFO L85 PathProgramCache]: Analyzing trace with hash 598957428, now seen corresponding path program 1 times [2024-06-27 20:34:58,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:58,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474400309] [2024-06-27 20:34:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:58,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474400309] [2024-06-27 20:34:59,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474400309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:59,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988795141] [2024-06-27 20:34:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:59,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:59,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:34:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:34:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:01,450 INFO L124 PetriNetUnfolderBase]: 11630/15996 cut-off events. [2024-06-27 20:35:01,451 INFO L125 PetriNetUnfolderBase]: For 146747/146747 co-relation queries the response was YES. [2024-06-27 20:35:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73301 conditions, 15996 events. 11630/15996 cut-off events. For 146747/146747 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 86041 event pairs, 5236 based on Foata normal form. 6/15999 useless extension candidates. Maximal degree in co-relation 73271. Up to 15586 conditions per place. [2024-06-27 20:35:01,583 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 129 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-27 20:35:01,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 1279 flow [2024-06-27 20:35:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 20:35:01,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010893246187363 [2024-06-27 20:35:01,585 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 621 flow. Second operand 9 states and 230 transitions. [2024-06-27 20:35:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 1279 flow [2024-06-27 20:35:01,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 166 transitions, 1232 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:35:01,639 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 765 flow [2024-06-27 20:35:01,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=765, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-27 20:35:01,639 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-27 20:35:01,639 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 765 flow [2024-06-27 20:35:01,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:01,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:01,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:01,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:35:01,640 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:01,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -401421806, now seen corresponding path program 2 times [2024-06-27 20:35:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:01,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599504212] [2024-06-27 20:35:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:01,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599504212] [2024-06-27 20:35:02,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599504212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:02,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:02,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:02,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802761928] [2024-06-27 20:35:02,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:02,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:02,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 765 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:02,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:02,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:04,532 INFO L124 PetriNetUnfolderBase]: 11612/15985 cut-off events. [2024-06-27 20:35:04,532 INFO L125 PetriNetUnfolderBase]: For 172618/172618 co-relation queries the response was YES. [2024-06-27 20:35:04,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76969 conditions, 15985 events. 11612/15985 cut-off events. For 172618/172618 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86306 event pairs, 5243 based on Foata normal form. 6/15988 useless extension candidates. Maximal degree in co-relation 76938. Up to 15622 conditions per place. [2024-06-27 20:35:04,657 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 123 selfloop transitions, 22 changer transitions 0/152 dead transitions. [2024-06-27 20:35:04,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 152 transitions, 1177 flow [2024-06-27 20:35:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 20:35:04,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877450980392157 [2024-06-27 20:35:04,659 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 765 flow. Second operand 8 states and 199 transitions. [2024-06-27 20:35:04,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 152 transitions, 1177 flow [2024-06-27 20:35:04,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1065 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:04,750 INFO L231 Difference]: Finished difference. Result has 92 places, 106 transitions, 708 flow [2024-06-27 20:35:04,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=708, PETRI_PLACES=92, PETRI_TRANSITIONS=106} [2024-06-27 20:35:04,751 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-27 20:35:04,751 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 106 transitions, 708 flow [2024-06-27 20:35:04,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:04,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:04,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:35:04,752 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:04,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 898091328, now seen corresponding path program 3 times [2024-06-27 20:35:04,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:04,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205702838] [2024-06-27 20:35:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:05,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:05,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205702838] [2024-06-27 20:35:05,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205702838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:05,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:05,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:05,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941981931] [2024-06-27 20:35:05,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:05,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:05,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 106 transitions, 708 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:05,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:05,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:05,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:07,719 INFO L124 PetriNetUnfolderBase]: 11645/16034 cut-off events. [2024-06-27 20:35:07,719 INFO L125 PetriNetUnfolderBase]: For 189129/189129 co-relation queries the response was YES. [2024-06-27 20:35:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78353 conditions, 16034 events. 11645/16034 cut-off events. For 189129/189129 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 86694 event pairs, 5032 based on Foata normal form. 6/16033 useless extension candidates. Maximal degree in co-relation 78320. Up to 15490 conditions per place. [2024-06-27 20:35:07,808 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 106 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-27 20:35:07,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 1190 flow [2024-06-27 20:35:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 20:35:07,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-06-27 20:35:07,810 INFO L175 Difference]: Start difference. First operand has 92 places, 106 transitions, 708 flow. Second operand 8 states and 202 transitions. [2024-06-27 20:35:07,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 1190 flow [2024-06-27 20:35:07,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 155 transitions, 1135 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:07,894 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 820 flow [2024-06-27 20:35:07,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=820, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-27 20:35:07,894 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-27 20:35:07,895 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 820 flow [2024-06-27 20:35:07,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:07,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:07,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:07,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:35:07,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:07,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1097082910, now seen corresponding path program 1 times [2024-06-27 20:35:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:07,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666807364] [2024-06-27 20:35:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:08,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:08,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666807364] [2024-06-27 20:35:08,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666807364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:08,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279866929] [2024-06-27 20:35:08,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:08,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:08,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:08,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:08,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:08,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:08,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:10,671 INFO L124 PetriNetUnfolderBase]: 11976/16422 cut-off events. [2024-06-27 20:35:10,671 INFO L125 PetriNetUnfolderBase]: For 219617/219617 co-relation queries the response was YES. [2024-06-27 20:35:10,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83927 conditions, 16422 events. 11976/16422 cut-off events. For 219617/219617 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 86331 event pairs, 5646 based on Foata normal form. 3/16422 useless extension candidates. Maximal degree in co-relation 83893. Up to 16122 conditions per place. [2024-06-27 20:35:10,824 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 120 selfloop transitions, 25 changer transitions 0/150 dead transitions. [2024-06-27 20:35:10,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 150 transitions, 1293 flow [2024-06-27 20:35:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:35:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:35:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 20:35:10,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2024-06-27 20:35:10,827 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 820 flow. Second operand 7 states and 164 transitions. [2024-06-27 20:35:10,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 150 transitions, 1293 flow [2024-06-27 20:35:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1152 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:10,921 INFO L231 Difference]: Finished difference. Result has 94 places, 118 transitions, 860 flow [2024-06-27 20:35:10,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=94, PETRI_TRANSITIONS=118} [2024-06-27 20:35:10,923 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-06-27 20:35:10,923 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 118 transitions, 860 flow [2024-06-27 20:35:10,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:10,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:10,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:10,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:35:10,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:10,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -253812206, now seen corresponding path program 4 times [2024-06-27 20:35:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047615603] [2024-06-27 20:35:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:12,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047615603] [2024-06-27 20:35:12,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047615603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:12,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:12,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533021073] [2024-06-27 20:35:12,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:12,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:12,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:12,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:12,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:12,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:14,011 INFO L124 PetriNetUnfolderBase]: 11672/16096 cut-off events. [2024-06-27 20:35:14,011 INFO L125 PetriNetUnfolderBase]: For 247962/247962 co-relation queries the response was YES. [2024-06-27 20:35:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85697 conditions, 16096 events. 11672/16096 cut-off events. For 247962/247962 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 87127 event pairs, 5149 based on Foata normal form. 9/16102 useless extension candidates. Maximal degree in co-relation 85662. Up to 15612 conditions per place. [2024-06-27 20:35:14,128 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 127 selfloop transitions, 29 changer transitions 0/163 dead transitions. [2024-06-27 20:35:14,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 163 transitions, 1360 flow [2024-06-27 20:35:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 20:35:14,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-27 20:35:14,130 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 860 flow. Second operand 8 states and 194 transitions. [2024-06-27 20:35:14,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 163 transitions, 1360 flow [2024-06-27 20:35:14,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 163 transitions, 1274 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:14,212 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 929 flow [2024-06-27 20:35:14,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-27 20:35:14,212 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 20:35:14,213 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 929 flow [2024-06-27 20:35:14,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:14,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:14,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:14,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:35:14,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:14,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash 438027830, now seen corresponding path program 1 times [2024-06-27 20:35:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451643922] [2024-06-27 20:35:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451643922] [2024-06-27 20:35:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451643922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896490909] [2024-06-27 20:35:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:15,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:15,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:15,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:15,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 929 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:15,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:15,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:15,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:17,432 INFO L124 PetriNetUnfolderBase]: 12135/16753 cut-off events. [2024-06-27 20:35:17,432 INFO L125 PetriNetUnfolderBase]: For 306301/306301 co-relation queries the response was YES. [2024-06-27 20:35:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94689 conditions, 16753 events. 12135/16753 cut-off events. For 306301/306301 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 91613 event pairs, 4509 based on Foata normal form. 24/16774 useless extension candidates. Maximal degree in co-relation 94653. Up to 15791 conditions per place. [2024-06-27 20:35:17,570 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 159 selfloop transitions, 36 changer transitions 0/202 dead transitions. [2024-06-27 20:35:17,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 202 transitions, 1777 flow [2024-06-27 20:35:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 20:35:17,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078431372549019 [2024-06-27 20:35:17,572 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 929 flow. Second operand 10 states and 259 transitions. [2024-06-27 20:35:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 202 transitions, 1777 flow [2024-06-27 20:35:17,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 202 transitions, 1654 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:17,705 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1007 flow [2024-06-27 20:35:17,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1007, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-06-27 20:35:17,706 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-27 20:35:17,706 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1007 flow [2024-06-27 20:35:17,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:17,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:17,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:35:17,707 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:17,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:17,707 INFO L85 PathProgramCache]: Analyzing trace with hash 438030620, now seen corresponding path program 2 times [2024-06-27 20:35:17,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:17,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955070685] [2024-06-27 20:35:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:18,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:18,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955070685] [2024-06-27 20:35:18,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955070685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:18,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:18,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:18,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261461419] [2024-06-27 20:35:18,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:18,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:18,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:18,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1007 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:18,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:18,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:18,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:21,055 INFO L124 PetriNetUnfolderBase]: 12051/16637 cut-off events. [2024-06-27 20:35:21,055 INFO L125 PetriNetUnfolderBase]: For 335265/335265 co-relation queries the response was YES. [2024-06-27 20:35:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95490 conditions, 16637 events. 12051/16637 cut-off events. For 335265/335265 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 90718 event pairs, 5068 based on Foata normal form. 36/16670 useless extension candidates. Maximal degree in co-relation 95453. Up to 15949 conditions per place. [2024-06-27 20:35:21,176 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 156 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2024-06-27 20:35:21,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 195 transitions, 1593 flow [2024-06-27 20:35:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 20:35:21,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-06-27 20:35:21,177 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1007 flow. Second operand 10 states and 252 transitions. [2024-06-27 20:35:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 195 transitions, 1593 flow [2024-06-27 20:35:21,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 195 transitions, 1526 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:21,280 INFO L231 Difference]: Finished difference. Result has 105 places, 126 transitions, 1017 flow [2024-06-27 20:35:21,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1017, PETRI_PLACES=105, PETRI_TRANSITIONS=126} [2024-06-27 20:35:21,280 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-27 20:35:21,280 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 126 transitions, 1017 flow [2024-06-27 20:35:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:21,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:21,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:21,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:35:21,281 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:21,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1141685312, now seen corresponding path program 1 times [2024-06-27 20:35:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:21,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457388765] [2024-06-27 20:35:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:21,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457388765] [2024-06-27 20:35:22,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457388765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:22,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452408029] [2024-06-27 20:35:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:22,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:22,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 126 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:22,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:22,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:22,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:24,563 INFO L124 PetriNetUnfolderBase]: 12416/17084 cut-off events. [2024-06-27 20:35:24,563 INFO L125 PetriNetUnfolderBase]: For 356315/356320 co-relation queries the response was YES. [2024-06-27 20:35:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98607 conditions, 17084 events. 12416/17084 cut-off events. For 356315/356320 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 91162 event pairs, 5257 based on Foata normal form. 8/17087 useless extension candidates. Maximal degree in co-relation 98568. Up to 16661 conditions per place. [2024-06-27 20:35:24,695 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 138 selfloop transitions, 35 changer transitions 0/178 dead transitions. [2024-06-27 20:35:24,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 178 transitions, 1574 flow [2024-06-27 20:35:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 20:35:24,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730392156862745 [2024-06-27 20:35:24,696 INFO L175 Difference]: Start difference. First operand has 105 places, 126 transitions, 1017 flow. Second operand 8 states and 193 transitions. [2024-06-27 20:35:24,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 178 transitions, 1574 flow [2024-06-27 20:35:24,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 178 transitions, 1502 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:24,845 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1129 flow [2024-06-27 20:35:24,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1129, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-27 20:35:24,845 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-27 20:35:24,846 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1129 flow [2024-06-27 20:35:24,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:24,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:24,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:24,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:35:24,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:24,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 556118300, now seen corresponding path program 3 times [2024-06-27 20:35:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996462718] [2024-06-27 20:35:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996462718] [2024-06-27 20:35:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996462718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:25,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:25,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:25,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337338318] [2024-06-27 20:35:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:25,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:25,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:26,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1129 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:26,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:26,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:28,525 INFO L124 PetriNetUnfolderBase]: 12226/16970 cut-off events. [2024-06-27 20:35:28,525 INFO L125 PetriNetUnfolderBase]: For 403847/403853 co-relation queries the response was YES. [2024-06-27 20:35:28,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101969 conditions, 16970 events. 12226/16970 cut-off events. For 403847/403853 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 93754 event pairs, 4648 based on Foata normal form. 40/16989 useless extension candidates. Maximal degree in co-relation 101928. Up to 16038 conditions per place. [2024-06-27 20:35:28,722 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 131 selfloop transitions, 60 changer transitions 0/199 dead transitions. [2024-06-27 20:35:28,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 199 transitions, 1969 flow [2024-06-27 20:35:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 20:35:28,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054466230936819 [2024-06-27 20:35:28,724 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1129 flow. Second operand 9 states and 232 transitions. [2024-06-27 20:35:28,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 199 transitions, 1969 flow [2024-06-27 20:35:28,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1841 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:28,914 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1325 flow [2024-06-27 20:35:28,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-27 20:35:28,915 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-27 20:35:28,915 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1325 flow [2024-06-27 20:35:28,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:28,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:28,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:35:28,916 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1202493005, now seen corresponding path program 1 times [2024-06-27 20:35:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:28,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830219660] [2024-06-27 20:35:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830219660] [2024-06-27 20:35:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830219660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:29,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:35:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804170809] [2024-06-27 20:35:29,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:35:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:35:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:35:29,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:29,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1325 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:29,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:29,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:29,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:31,568 INFO L124 PetriNetUnfolderBase]: 12154/16978 cut-off events. [2024-06-27 20:35:31,569 INFO L125 PetriNetUnfolderBase]: For 446132/446194 co-relation queries the response was YES. [2024-06-27 20:35:31,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106481 conditions, 16978 events. 12154/16978 cut-off events. For 446132/446194 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93634 event pairs, 5264 based on Foata normal form. 14/16953 useless extension candidates. Maximal degree in co-relation 106438. Up to 16363 conditions per place. [2024-06-27 20:35:31,726 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 142 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-06-27 20:35:31,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1949 flow [2024-06-27 20:35:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:35:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:35:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 20:35:31,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-27 20:35:31,728 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1325 flow. Second operand 6 states and 150 transitions. [2024-06-27 20:35:31,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1949 flow [2024-06-27 20:35:31,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 179 transitions, 1883 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:31,949 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1479 flow [2024-06-27 20:35:31,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1479, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-27 20:35:31,949 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 20:35:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1479 flow [2024-06-27 20:35:31,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:31,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:31,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:31,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:35:31,950 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:31,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -782526092, now seen corresponding path program 2 times [2024-06-27 20:35:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:31,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121144285] [2024-06-27 20:35:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:32,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121144285] [2024-06-27 20:35:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121144285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:32,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:32,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:32,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922490342] [2024-06-27 20:35:32,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:32,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:33,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:33,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:33,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:33,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:36,153 INFO L124 PetriNetUnfolderBase]: 12762/17626 cut-off events. [2024-06-27 20:35:36,153 INFO L125 PetriNetUnfolderBase]: For 480021/480021 co-relation queries the response was YES. [2024-06-27 20:35:36,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114053 conditions, 17626 events. 12762/17626 cut-off events. For 480021/480021 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94625 event pairs, 5257 based on Foata normal form. 6/17629 useless extension candidates. Maximal degree in co-relation 114007. Up to 17241 conditions per place. [2024-06-27 20:35:36,303 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 166 selfloop transitions, 23 changer transitions 0/194 dead transitions. [2024-06-27 20:35:36,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 194 transitions, 2039 flow [2024-06-27 20:35:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 20:35:36,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534313725490196 [2024-06-27 20:35:36,305 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1479 flow. Second operand 8 states and 185 transitions. [2024-06-27 20:35:36,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 194 transitions, 2039 flow [2024-06-27 20:35:36,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 1989 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-27 20:35:36,492 INFO L231 Difference]: Finished difference. Result has 119 places, 154 transitions, 1571 flow [2024-06-27 20:35:36,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=119, PETRI_TRANSITIONS=154} [2024-06-27 20:35:36,493 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-27 20:35:36,493 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 154 transitions, 1571 flow [2024-06-27 20:35:36,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:36,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:36,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:35:36,494 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:36,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1019182820, now seen corresponding path program 4 times [2024-06-27 20:35:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137358519] [2024-06-27 20:35:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:37,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:37,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137358519] [2024-06-27 20:35:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137358519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:37,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499680785] [2024-06-27 20:35:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:37,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:37,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 154 transitions, 1571 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:37,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:37,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:37,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:40,396 INFO L124 PetriNetUnfolderBase]: 12506/17376 cut-off events. [2024-06-27 20:35:40,396 INFO L125 PetriNetUnfolderBase]: For 539143/539143 co-relation queries the response was YES. [2024-06-27 20:35:40,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116017 conditions, 17376 events. 12506/17376 cut-off events. For 539143/539143 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 96002 event pairs, 4861 based on Foata normal form. 42/17415 useless extension candidates. Maximal degree in co-relation 115968. Up to 16569 conditions per place. [2024-06-27 20:35:40,662 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/210 dead transitions. [2024-06-27 20:35:40,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 2229 flow [2024-06-27 20:35:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 20:35:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 20:35:40,664 INFO L175 Difference]: Start difference. First operand has 119 places, 154 transitions, 1571 flow. Second operand 9 states and 221 transitions. [2024-06-27 20:35:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 2229 flow [2024-06-27 20:35:40,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 2113 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:40,928 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1608 flow [2024-06-27 20:35:40,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1608, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-06-27 20:35:40,929 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-27 20:35:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1608 flow [2024-06-27 20:35:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-27 20:35:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:35:40,930 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:40,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash -782823010, now seen corresponding path program 1 times [2024-06-27 20:35:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098998635] [2024-06-27 20:35:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:42,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:42,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098998635] [2024-06-27 20:35:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098998635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:42,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:42,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719002604] [2024-06-27 20:35:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:42,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:42,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1608 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:44,522 INFO L124 PetriNetUnfolderBase]: 12931/17876 cut-off events. [2024-06-27 20:35:44,522 INFO L125 PetriNetUnfolderBase]: For 568162/568162 co-relation queries the response was YES. [2024-06-27 20:35:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120982 conditions, 17876 events. 12931/17876 cut-off events. For 568162/568162 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96314 event pairs, 5366 based on Foata normal form. 3/17876 useless extension candidates. Maximal degree in co-relation 120932. Up to 17461 conditions per place. [2024-06-27 20:35:44,829 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 162 selfloop transitions, 33 changer transitions 0/200 dead transitions. [2024-06-27 20:35:44,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 200 transitions, 2147 flow [2024-06-27 20:35:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 20:35:44,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:35:44,831 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1608 flow. Second operand 8 states and 187 transitions. [2024-06-27 20:35:44,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 200 transitions, 2147 flow [2024-06-27 20:35:45,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 2005 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:45,194 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1599 flow [2024-06-27 20:35:45,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-27 20:35:45,195 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-27 20:35:45,195 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1599 flow [2024-06-27 20:35:45,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:45,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:45,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:45,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:35:45,196 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:45,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1018998122, now seen corresponding path program 3 times [2024-06-27 20:35:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:45,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516801319] [2024-06-27 20:35:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516801319] [2024-06-27 20:35:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516801319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:46,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649974279] [2024-06-27 20:35:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:46,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:46,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:46,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:46,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:46,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:49,242 INFO L124 PetriNetUnfolderBase]: 12967/17928 cut-off events. [2024-06-27 20:35:49,242 INFO L125 PetriNetUnfolderBase]: For 589796/589796 co-relation queries the response was YES. [2024-06-27 20:35:49,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121801 conditions, 17928 events. 12967/17928 cut-off events. For 589796/589796 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96510 event pairs, 5326 based on Foata normal form. 6/17931 useless extension candidates. Maximal degree in co-relation 121750. Up to 17521 conditions per place. [2024-06-27 20:35:49,597 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 175 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2024-06-27 20:35:49,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 208 transitions, 2240 flow [2024-06-27 20:35:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 20:35:49,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-06-27 20:35:49,599 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1599 flow. Second operand 8 states and 188 transitions. [2024-06-27 20:35:49,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 208 transitions, 2240 flow [2024-06-27 20:35:49,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 208 transitions, 2122 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:49,833 INFO L231 Difference]: Finished difference. Result has 125 places, 167 transitions, 1692 flow [2024-06-27 20:35:49,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1692, PETRI_PLACES=125, PETRI_TRANSITIONS=167} [2024-06-27 20:35:49,834 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-06-27 20:35:49,834 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 167 transitions, 1692 flow [2024-06-27 20:35:49,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:49,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:49,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:49,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:35:49,835 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:49,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash -790866332, now seen corresponding path program 4 times [2024-06-27 20:35:49,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:49,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395334481] [2024-06-27 20:35:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:49,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:50,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:50,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395334481] [2024-06-27 20:35:50,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395334481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:50,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780745151] [2024-06-27 20:35:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:50,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:50,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:50,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:50,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 167 transitions, 1692 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:50,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:50,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:50,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:53,657 INFO L124 PetriNetUnfolderBase]: 12952/17907 cut-off events. [2024-06-27 20:35:53,657 INFO L125 PetriNetUnfolderBase]: For 636720/636720 co-relation queries the response was YES. [2024-06-27 20:35:53,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125170 conditions, 17907 events. 12952/17907 cut-off events. For 636720/636720 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96430 event pairs, 5331 based on Foata normal form. 6/17910 useless extension candidates. Maximal degree in co-relation 125117. Up to 17507 conditions per place. [2024-06-27 20:35:53,847 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 177 selfloop transitions, 28 changer transitions 0/210 dead transitions. [2024-06-27 20:35:53,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 210 transitions, 2302 flow [2024-06-27 20:35:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 20:35:53,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2024-06-27 20:35:53,849 INFO L175 Difference]: Start difference. First operand has 125 places, 167 transitions, 1692 flow. Second operand 8 states and 186 transitions. [2024-06-27 20:35:53,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 210 transitions, 2302 flow [2024-06-27 20:35:54,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 210 transitions, 2156 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:54,200 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1715 flow [2024-06-27 20:35:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1715, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-27 20:35:54,201 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-27 20:35:54,201 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1715 flow [2024-06-27 20:35:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:54,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:54,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:54,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:35:54,202 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:54,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1878855965, now seen corresponding path program 2 times [2024-06-27 20:35:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14891362] [2024-06-27 20:35:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14891362] [2024-06-27 20:35:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14891362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:55,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:35:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545754368] [2024-06-27 20:35:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:55,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:35:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:35:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:35:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-27 20:35:55,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1715 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:55,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:55,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-27 20:35:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:57,516 INFO L124 PetriNetUnfolderBase]: 12300/17218 cut-off events. [2024-06-27 20:35:57,517 INFO L125 PetriNetUnfolderBase]: For 670423/670471 co-relation queries the response was YES. [2024-06-27 20:35:57,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122597 conditions, 17218 events. 12300/17218 cut-off events. For 670423/670471 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 95201 event pairs, 5302 based on Foata normal form. 6/17174 useless extension candidates. Maximal degree in co-relation 122543. Up to 16655 conditions per place. [2024-06-27 20:35:57,796 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 158 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2024-06-27 20:35:57,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 2109 flow [2024-06-27 20:35:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:35:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:35:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 20:35:57,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-27 20:35:57,798 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1715 flow. Second operand 6 states and 139 transitions. [2024-06-27 20:35:57,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 2109 flow [2024-06-27 20:35:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1938 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:58,107 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1581 flow [2024-06-27 20:35:58,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1581, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-27 20:35:58,108 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-27 20:35:58,108 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1581 flow [2024-06-27 20:35:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:58,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:58,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:35:58,109 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:35:58,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash -214753477, now seen corresponding path program 1 times [2024-06-27 20:35:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222452288] [2024-06-27 20:35:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222452288] [2024-06-27 20:35:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222452288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:35:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309343137] [2024-06-27 20:35:58,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:35:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:35:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:35:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:35:58,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1581 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:58,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:58,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:35:58,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:01,569 INFO L124 PetriNetUnfolderBase]: 12956/17911 cut-off events. [2024-06-27 20:36:01,569 INFO L125 PetriNetUnfolderBase]: For 707567/707567 co-relation queries the response was YES. [2024-06-27 20:36:01,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128199 conditions, 17911 events. 12956/17911 cut-off events. For 707567/707567 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 96599 event pairs, 5327 based on Foata normal form. 4/17909 useless extension candidates. Maximal degree in co-relation 128144. Up to 17561 conditions per place. [2024-06-27 20:36:01,732 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 174 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-27 20:36:01,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2295 flow [2024-06-27 20:36:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:36:01,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:36:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 20:36:01,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2024-06-27 20:36:01,733 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1581 flow. Second operand 6 states and 143 transitions. [2024-06-27 20:36:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2295 flow [2024-06-27 20:36:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 203 transitions, 2238 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:36:02,263 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1729 flow [2024-06-27 20:36:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2024-06-27 20:36:02,264 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-27 20:36:02,264 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1729 flow [2024-06-27 20:36:02,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:02,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:02,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:36:02,265 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:36:02,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1901205167, now seen corresponding path program 2 times [2024-06-27 20:36:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:02,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701115138] [2024-06-27 20:36:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:02,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:02,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701115138] [2024-06-27 20:36:02,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701115138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:02,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:02,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:36:02,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178065662] [2024-06-27 20:36:02,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:02,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:36:02,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:36:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:36:02,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-27 20:36:02,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1729 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:02,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:02,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-27 20:36:02,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand