./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.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/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --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 20:32:36,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:32:37,019 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:32:37,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:32:37,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:32:37,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:32:37,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:32:37,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:32:37,051 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:32:37,056 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:32:37,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:32:37,056 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:32:37,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:32:37,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:32:37,058 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:32:37,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:32:37,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:32:37,059 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:32:37,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:32:37,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:32:37,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:32:37,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:32:37,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:32:37,062 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:32:37,062 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:32:37,062 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:32:37,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:32:37,062 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:32:37,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:32:37,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:32:37,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:32:37,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:32:37,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:32:37,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:32:37,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:32:37,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:32:37,066 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:32:37,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:32:37,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:32:37,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:32:37,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:32:37,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:32:37,384 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:32:37,385 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:32:37,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 20:32:37,536 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:32:37,538 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:32:37,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:32:38,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:32:38,872 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:32:38,873 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:32:38,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb8d06f7c/6856437659714d568d8c1b990f3bece5/FLAG4d4962982 [2024-06-27 20:32:38,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb8d06f7c/6856437659714d568d8c1b990f3bece5 [2024-06-27 20:32:38,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:32:38,897 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:32:38,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:32:38,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:32:38,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:32:38,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:37" (1/2) ... [2024-06-27 20:32:38,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef2e2a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:32:38, skipping insertion in model container [2024-06-27 20:32:38,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:37" (1/2) ... [2024-06-27 20:32:38,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64cc4795 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:32:38, skipping insertion in model container [2024-06-27 20:32:38,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:32:38" (2/2) ... [2024-06-27 20:32:38,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef2e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:38, skipping insertion in model container [2024-06-27 20:32:38,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:32:38" (2/2) ... [2024-06-27 20:32:38,905 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:32:38,969 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:32:38,970 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-27 20:32:38,971 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-27 20:32:38,971 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) [2024-06-27 20:32:38,971 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:32:38,971 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-27 20:32:39,006 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:32:39,318 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:32:39,328 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:32:39,420 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:32:39,454 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:32:39,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39 WrapperNode [2024-06-27 20:32:39,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:32:39,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:32:39,455 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:32:39,455 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:32:39,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,523 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-27 20:32:39,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:32:39,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:32:39,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:32:39,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:32:39,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,549 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,568 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 20:32:39,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:32:39,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:32:39,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:32:39,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:32:39,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (1/1) ... [2024-06-27 20:32:39,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:32:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:32:39,718 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 20:32:39,755 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 20:32:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:32:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:32:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:32:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:32:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:32:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:32:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:32:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:32:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:32:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:32:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:32:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:32:39,781 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 20:32:39,890 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:32:39,892 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:32:40,130 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:32:40,131 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:32:40,251 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:32:40,251 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:32:40,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:32:40 BoogieIcfgContainer [2024-06-27 20:32:40,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:32:40,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:32:40,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:32:40,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:32:40,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:32:37" (1/4) ... [2024-06-27 20:32:40,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c98a21 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:32:40, skipping insertion in model container [2024-06-27 20:32:40,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:32:38" (2/4) ... [2024-06-27 20:32:40,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c98a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:32:40, skipping insertion in model container [2024-06-27 20:32:40,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:32:39" (3/4) ... [2024-06-27 20:32:40,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c98a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:32:40, skipping insertion in model container [2024-06-27 20:32:40,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:32:40" (4/4) ... [2024-06-27 20:32:40,261 INFO L112 eAbstractionObserver]: Analyzing ICFG mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-27 20:32:40,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:32:40,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:32:40,274 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:32:40,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:32:40,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:32:40,376 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:32:40,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:32:40,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:32:40,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:32:40,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:32:40,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:32:40,399 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;@286a844d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:32:40,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:32:40,405 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:32:40,405 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:32:40,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:32:40,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:40,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:32:40,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 368893735, now seen corresponding path program 1 times [2024-06-27 20:32:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336731756] [2024-06-27 20:32:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:40,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:41,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336731756] [2024-06-27 20:32:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336731756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:41,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:41,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:32:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054053265] [2024-06-27 20:32:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:41,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:32:41,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:32:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:32:41,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:32:41,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:32:41,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:41,576 INFO L124 PetriNetUnfolderBase]: 1359/2149 cut-off events. [2024-06-27 20:32:41,576 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:32:41,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4263 conditions, 2149 events. 1359/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10665 event pairs, 941 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4251. Up to 2029 conditions per place. [2024-06-27 20:32:41,595 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:32:41,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-27 20:32:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:32:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:32:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-27 20:32:41,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 20:32:41,607 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 75 transitions. [2024-06-27 20:32:41,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-27 20:32:41,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:41,612 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:32:41,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:32:41,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:32:41,616 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:32:41,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:41,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:41,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:41,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:32:41,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:41,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1975373562, now seen corresponding path program 1 times [2024-06-27 20:32:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507436396] [2024-06-27 20:32:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:42,145 INFO 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 20:32:42,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:42,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507436396] [2024-06-27 20:32:42,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507436396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:42,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:42,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:32:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408557596] [2024-06-27 20:32:42,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:32:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:32:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:32:42,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:32:42,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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 20:32:42,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:42,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:32:42,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:42,477 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-27 20:32:42,477 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-27 20:32:42,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11610 event pairs, 930 based on Foata normal form. 3/2352 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-27 20:32:42,489 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:32:42,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-27 20:32:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:32:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:32:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 20:32:42,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-27 20:32:42,491 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 94 transitions. [2024-06-27 20:32:42,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-27 20:32:42,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:32:42,493 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:32:42,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:32:42,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:32:42,494 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:32:42,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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 20:32:42,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:42,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:42,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:32:42,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:42,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1107037196, now seen corresponding path program 1 times [2024-06-27 20:32:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:42,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519290255] [2024-06-27 20:32:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:42,988 INFO 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 20:32:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519290255] [2024-06-27 20:32:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519290255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:42,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:42,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:32:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232355408] [2024-06-27 20:32:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:32:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:32:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:32:43,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:32:43,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:43,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:43,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:32:43,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:43,333 INFO L124 PetriNetUnfolderBase]: 1568/2406 cut-off events. [2024-06-27 20:32:43,334 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-27 20:32:43,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 2406 events. 1568/2406 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11798 event pairs, 669 based on Foata normal form. 5/2390 useless extension candidates. Maximal degree in co-relation 6025. Up to 2248 conditions per place. [2024-06-27 20:32:43,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 20:32:43,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-27 20:32:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:32:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:32:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 20:32:43,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 20:32:43,348 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 123 transitions. [2024-06-27 20:32:43,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-27 20:32:43,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:32:43,350 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:32:43,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:32:43,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:32:43,351 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:32:43,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:43,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:43,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:32:43,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:43,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2146270291, now seen corresponding path program 1 times [2024-06-27 20:32:43,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:43,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104160961] [2024-06-27 20:32:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:43,931 INFO 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 20:32:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:43,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104160961] [2024-06-27 20:32:43,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104160961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:43,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:43,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:32:43,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266379793] [2024-06-27 20:32:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:43,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:32:43,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:32:43,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:32:43,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:32:43,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:43,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:43,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:32:43,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:44,283 INFO L124 PetriNetUnfolderBase]: 1580/2426 cut-off events. [2024-06-27 20:32:44,284 INFO L125 PetriNetUnfolderBase]: For 3144/3147 co-relation queries the response was YES. [2024-06-27 20:32:44,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 2426 events. 1580/2426 cut-off events. For 3144/3147 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11893 event pairs, 481 based on Foata normal form. 12/2417 useless extension candidates. Maximal degree in co-relation 7166. Up to 2216 conditions per place. [2024-06-27 20:32:44,297 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-27 20:32:44,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 499 flow [2024-06-27 20:32:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 20:32:44,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-27 20:32:44,299 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 141 transitions. [2024-06-27 20:32:44,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 499 flow [2024-06-27 20:32:44,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 491 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:32:44,303 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-27 20:32:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 20:32:44,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:32:44,304 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-27 20:32:44,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:44,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:44,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:32:44,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:44,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:44,305 INFO L85 PathProgramCache]: Analyzing trace with hash 706560531, now seen corresponding path program 1 times [2024-06-27 20:32:44,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:44,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435486517] [2024-06-27 20:32:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:44,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435486517] [2024-06-27 20:32:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435486517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:32:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926424914] [2024-06-27 20:32:44,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:32:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:32:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:32:44,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:44,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:44,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:44,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:45,207 INFO L124 PetriNetUnfolderBase]: 1368/2164 cut-off events. [2024-06-27 20:32:45,207 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-27 20:32:45,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 2164 events. 1368/2164 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10905 event pairs, 562 based on Foata normal form. 2/2133 useless extension candidates. Maximal degree in co-relation 6914. Up to 2036 conditions per place. [2024-06-27 20:32:45,218 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-27 20:32:45,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 435 flow [2024-06-27 20:32:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:32:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:32:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-27 20:32:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:32:45,219 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 95 transitions. [2024-06-27 20:32:45,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 435 flow [2024-06-27 20:32:45,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 385 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:45,223 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-27 20:32:45,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 20:32:45,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:32:45,224 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-27 20:32:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:45,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:45,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:32:45,225 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:45,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 413751189, now seen corresponding path program 1 times [2024-06-27 20:32:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549537087] [2024-06-27 20:32:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549537087] [2024-06-27 20:32:45,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549537087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:45,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417913382] [2024-06-27 20:32:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:45,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:45,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:45,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:46,222 INFO L124 PetriNetUnfolderBase]: 1358/2222 cut-off events. [2024-06-27 20:32:46,222 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-27 20:32:46,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6989 conditions, 2222 events. 1358/2222 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11529 event pairs, 526 based on Foata normal form. 4/2215 useless extension candidates. Maximal degree in co-relation 6966. Up to 2004 conditions per place. [2024-06-27 20:32:46,234 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 11 changer transitions 0/71 dead transitions. [2024-06-27 20:32:46,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 455 flow [2024-06-27 20:32:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:32:46,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 20:32:46,236 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:32:46,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 455 flow [2024-06-27 20:32:46,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 433 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:46,240 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-27 20:32:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 20:32:46,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:32:46,241 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-27 20:32:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:46,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:46,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:46,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:32:46,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:46,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash -831866872, now seen corresponding path program 1 times [2024-06-27 20:32:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902378556] [2024-06-27 20:32:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:46,712 INFO 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 20:32:46,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902378556] [2024-06-27 20:32:46,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902378556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:46,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:46,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:46,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156117175] [2024-06-27 20:32:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:46,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:46,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:46,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:46,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:46,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:46,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:46,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:47,225 INFO L124 PetriNetUnfolderBase]: 1571/2445 cut-off events. [2024-06-27 20:32:47,226 INFO L125 PetriNetUnfolderBase]: For 7155/7161 co-relation queries the response was YES. [2024-06-27 20:32:47,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8419 conditions, 2445 events. 1571/2445 cut-off events. For 7155/7161 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12136 event pairs, 635 based on Foata normal form. 8/2439 useless extension candidates. Maximal degree in co-relation 8396. Up to 2253 conditions per place. [2024-06-27 20:32:47,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-27 20:32:47,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 541 flow [2024-06-27 20:32:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:32:47,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:32:47,248 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:32:47,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 541 flow [2024-06-27 20:32:47,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:47,252 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-27 20:32:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:32:47,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 20:32:47,254 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-27 20:32:47,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:47,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:47,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:47,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:32:47,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:47,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 399861554, now seen corresponding path program 2 times [2024-06-27 20:32:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:47,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392893159] [2024-06-27 20:32:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:47,816 INFO 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 20:32:47,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392893159] [2024-06-27 20:32:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392893159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:47,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167571947] [2024-06-27 20:32:47,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:47,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:47,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:47,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:47,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:47,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:48,345 INFO L124 PetriNetUnfolderBase]: 1559/2418 cut-off events. [2024-06-27 20:32:48,346 INFO L125 PetriNetUnfolderBase]: For 8569/8575 co-relation queries the response was YES. [2024-06-27 20:32:48,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 2418 events. 1559/2418 cut-off events. For 8569/8575 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11900 event pairs, 649 based on Foata normal form. 3/2402 useless extension candidates. Maximal degree in co-relation 8564. Up to 2237 conditions per place. [2024-06-27 20:32:48,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 48 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-27 20:32:48,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 515 flow [2024-06-27 20:32:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:32:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:32:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 20:32:48,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:32:48,361 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 112 transitions. [2024-06-27 20:32:48,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 515 flow [2024-06-27 20:32:48,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 486 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:48,366 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-27 20:32:48,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 20:32:48,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:32:48,367 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-27 20:32:48,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:48,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:48,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:32:48,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:48,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1700990038, now seen corresponding path program 1 times [2024-06-27 20:32:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:48,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565994023] [2024-06-27 20:32:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:48,886 INFO 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 20:32:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:48,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565994023] [2024-06-27 20:32:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565994023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:48,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143404820] [2024-06-27 20:32:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:48,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:48,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:48,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:48,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:48,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:49,477 INFO L124 PetriNetUnfolderBase]: 1733/2674 cut-off events. [2024-06-27 20:32:49,478 INFO L125 PetriNetUnfolderBase]: For 11477/11483 co-relation queries the response was YES. [2024-06-27 20:32:49,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9949 conditions, 2674 events. 1733/2674 cut-off events. For 11477/11483 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13228 event pairs, 546 based on Foata normal form. 9/2665 useless extension candidates. Maximal degree in co-relation 9924. Up to 2237 conditions per place. [2024-06-27 20:32:49,492 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 79 selfloop transitions, 39 changer transitions 0/123 dead transitions. [2024-06-27 20:32:49,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 123 transitions, 997 flow [2024-06-27 20:32:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:32:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:32:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:32:49,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 20:32:49,494 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:32:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 123 transitions, 997 flow [2024-06-27 20:32:49,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 123 transitions, 871 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:49,503 INFO L231 Difference]: Finished difference. Result has 69 places, 82 transitions, 581 flow [2024-06-27 20:32:49,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=69, PETRI_TRANSITIONS=82} [2024-06-27 20:32:49,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-27 20:32:49,504 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 82 transitions, 581 flow [2024-06-27 20:32:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:49,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:49,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:32:49,504 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1994410538, now seen corresponding path program 2 times [2024-06-27 20:32:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:49,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259232067] [2024-06-27 20:32:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:49,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:50,112 INFO 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 20:32:50,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259232067] [2024-06-27 20:32:50,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259232067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:50,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:50,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082186629] [2024-06-27 20:32:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:50,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:50,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 82 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:50,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:50,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:50,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:50,714 INFO L124 PetriNetUnfolderBase]: 1805/2786 cut-off events. [2024-06-27 20:32:50,714 INFO L125 PetriNetUnfolderBase]: For 14900/14905 co-relation queries the response was YES. [2024-06-27 20:32:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11402 conditions, 2786 events. 1805/2786 cut-off events. For 14900/14905 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13876 event pairs, 551 based on Foata normal form. 12/2780 useless extension candidates. Maximal degree in co-relation 11373. Up to 2285 conditions per place. [2024-06-27 20:32:50,729 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 65 selfloop transitions, 48 changer transitions 0/118 dead transitions. [2024-06-27 20:32:50,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 1003 flow [2024-06-27 20:32:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:32:50,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 20:32:50,731 INFO L175 Difference]: Start difference. First operand has 69 places, 82 transitions, 581 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:32:50,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 1003 flow [2024-06-27 20:32:50,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 975 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 20:32:50,745 INFO L231 Difference]: Finished difference. Result has 74 places, 89 transitions, 734 flow [2024-06-27 20:32:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=74, PETRI_TRANSITIONS=89} [2024-06-27 20:32:50,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-27 20:32:50,747 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 89 transitions, 734 flow [2024-06-27 20:32:50,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:50,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:50,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:32:50,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:50,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -488955566, now seen corresponding path program 3 times [2024-06-27 20:32:50,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22665562] [2024-06-27 20:32:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:51,324 INFO 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 20:32:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:51,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22665562] [2024-06-27 20:32:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22665562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:51,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335388615] [2024-06-27 20:32:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:51,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:51,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:51,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:51,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:51,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:51,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:51,929 INFO L124 PetriNetUnfolderBase]: 1841/2828 cut-off events. [2024-06-27 20:32:51,929 INFO L125 PetriNetUnfolderBase]: For 18153/18161 co-relation queries the response was YES. [2024-06-27 20:32:51,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12401 conditions, 2828 events. 1841/2828 cut-off events. For 18153/18161 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13978 event pairs, 563 based on Foata normal form. 7/2804 useless extension candidates. Maximal degree in co-relation 12370. Up to 2301 conditions per place. [2024-06-27 20:32:51,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 60 changer transitions 0/127 dead transitions. [2024-06-27 20:32:51,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 1268 flow [2024-06-27 20:32:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:32:51,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 20:32:51,948 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 734 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:32:51,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 1268 flow [2024-06-27 20:32:51,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 127 transitions, 1152 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:51,968 INFO L231 Difference]: Finished difference. Result has 77 places, 99 transitions, 882 flow [2024-06-27 20:32:51,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=77, PETRI_TRANSITIONS=99} [2024-06-27 20:32:51,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 20:32:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 99 transitions, 882 flow [2024-06-27 20:32:51,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:51,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:51,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:32:51,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:51,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash -13426628, now seen corresponding path program 4 times [2024-06-27 20:32:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:51,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465449586] [2024-06-27 20:32:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:52,513 INFO 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 20:32:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:52,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465449586] [2024-06-27 20:32:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465449586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:52,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691590187] [2024-06-27 20:32:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:52,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:52,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 99 transitions, 882 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:52,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:53,177 INFO L124 PetriNetUnfolderBase]: 1825/2814 cut-off events. [2024-06-27 20:32:53,177 INFO L125 PetriNetUnfolderBase]: For 18412/18420 co-relation queries the response was YES. [2024-06-27 20:32:53,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12227 conditions, 2814 events. 1825/2814 cut-off events. For 18412/18420 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13953 event pairs, 569 based on Foata normal form. 7/2788 useless extension candidates. Maximal degree in co-relation 12195. Up to 2294 conditions per place. [2024-06-27 20:32:53,195 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 58 changer transitions 0/125 dead transitions. [2024-06-27 20:32:53,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1242 flow [2024-06-27 20:32:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:32:53,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:32:53,196 INFO L175 Difference]: Start difference. First operand has 77 places, 99 transitions, 882 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:32:53,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1242 flow [2024-06-27 20:32:53,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1146 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:53,216 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 912 flow [2024-06-27 20:32:53,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-06-27 20:32:53,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-27 20:32:53,217 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 912 flow [2024-06-27 20:32:53,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:53,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:53,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:32:53,217 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:53,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1817032940, now seen corresponding path program 1 times [2024-06-27 20:32:53,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:53,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629631431] [2024-06-27 20:32:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:54,096 INFO 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 20:32:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:54,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629631431] [2024-06-27 20:32:54,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629631431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:54,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:32:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152450312] [2024-06-27 20:32:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:32:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:32:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:32:54,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:54,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 912 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:54,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:54,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:54,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:54,676 INFO L124 PetriNetUnfolderBase]: 1610/2581 cut-off events. [2024-06-27 20:32:54,677 INFO L125 PetriNetUnfolderBase]: For 17979/17981 co-relation queries the response was YES. [2024-06-27 20:32:54,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11235 conditions, 2581 events. 1610/2581 cut-off events. For 17979/17981 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13122 event pairs, 517 based on Foata normal form. 4/2566 useless extension candidates. Maximal degree in co-relation 11201. Up to 2349 conditions per place. [2024-06-27 20:32:54,691 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 103 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-06-27 20:32:54,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1228 flow [2024-06-27 20:32:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:32:54,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:32:54,693 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 912 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:32:54,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1228 flow [2024-06-27 20:32:54,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 1085 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:54,711 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 828 flow [2024-06-27 20:32:54,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-27 20:32:54,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:32:54,712 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 828 flow [2024-06-27 20:32:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:54,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:54,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:54,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:32:54,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:54,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1979327272, now seen corresponding path program 1 times [2024-06-27 20:32:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:54,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271046530] [2024-06-27 20:32:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:55,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:55,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271046530] [2024-06-27 20:32:55,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271046530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:55,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:55,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:32:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097366130] [2024-06-27 20:32:55,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:55,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:32:55,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:32:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:32:55,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:55,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 828 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:55,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:55,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:55,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:55,598 INFO L124 PetriNetUnfolderBase]: 1607/2577 cut-off events. [2024-06-27 20:32:55,598 INFO L125 PetriNetUnfolderBase]: For 18752/18754 co-relation queries the response was YES. [2024-06-27 20:32:55,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11170 conditions, 2577 events. 1607/2577 cut-off events. For 18752/18754 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13097 event pairs, 554 based on Foata normal form. 1/2559 useless extension candidates. Maximal degree in co-relation 11135. Up to 2387 conditions per place. [2024-06-27 20:32:55,629 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 98 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-27 20:32:55,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1086 flow [2024-06-27 20:32:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:32:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:32:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-27 20:32:55,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 20:32:55,645 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 828 flow. Second operand 5 states and 91 transitions. [2024-06-27 20:32:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1086 flow [2024-06-27 20:32:55,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 1045 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:55,666 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 837 flow [2024-06-27 20:32:55,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2024-06-27 20:32:55,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:32:55,666 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 837 flow [2024-06-27 20:32:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:55,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:55,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:55,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:32:55,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:55,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1697189302, now seen corresponding path program 1 times [2024-06-27 20:32:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767572105] [2024-06-27 20:32:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:56,261 INFO 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 20:32:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767572105] [2024-06-27 20:32:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767572105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:56,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96505416] [2024-06-27 20:32:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:56,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:56,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:56,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:56,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:56,915 INFO L124 PetriNetUnfolderBase]: 1858/2891 cut-off events. [2024-06-27 20:32:56,915 INFO L125 PetriNetUnfolderBase]: For 25322/25331 co-relation queries the response was YES. [2024-06-27 20:32:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13080 conditions, 2891 events. 1858/2891 cut-off events. For 25322/25331 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 14394 event pairs, 572 based on Foata normal form. 14/2901 useless extension candidates. Maximal degree in co-relation 13044. Up to 2316 conditions per place. [2024-06-27 20:32:56,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 63 changer transitions 0/142 dead transitions. [2024-06-27 20:32:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 142 transitions, 1337 flow [2024-06-27 20:32:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:32:56,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:32:56,934 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 837 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:32:56,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 142 transitions, 1337 flow [2024-06-27 20:32:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1309 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:32:56,957 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1022 flow [2024-06-27 20:32:56,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2024-06-27 20:32:56,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-27 20:32:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1022 flow [2024-06-27 20:32:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:56,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:32:56,959 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:56,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -560115186, now seen corresponding path program 2 times [2024-06-27 20:32:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30999280] [2024-06-27 20:32:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:57,519 INFO 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 20:32:57,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:57,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30999280] [2024-06-27 20:32:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30999280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960388740] [2024-06-27 20:32:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:57,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:57,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1022 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:57,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:58,165 INFO L124 PetriNetUnfolderBase]: 1890/2947 cut-off events. [2024-06-27 20:32:58,166 INFO L125 PetriNetUnfolderBase]: For 29578/29583 co-relation queries the response was YES. [2024-06-27 20:32:58,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13978 conditions, 2947 events. 1890/2947 cut-off events. For 29578/29583 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14803 event pairs, 558 based on Foata normal form. 8/2951 useless extension candidates. Maximal degree in co-relation 13941. Up to 2345 conditions per place. [2024-06-27 20:32:58,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 65 changer transitions 0/145 dead transitions. [2024-06-27 20:32:58,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 145 transitions, 1532 flow [2024-06-27 20:32:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:32:58,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 20:32:58,186 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1022 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:32:58,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 145 transitions, 1532 flow [2024-06-27 20:32:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1317 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:58,206 INFO L231 Difference]: Finished difference. Result has 87 places, 116 transitions, 1038 flow [2024-06-27 20:32:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=87, PETRI_TRANSITIONS=116} [2024-06-27 20:32:58,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 20:32:58,209 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 116 transitions, 1038 flow [2024-06-27 20:32:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:58,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:58,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:32:58,211 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:58,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2022247450, now seen corresponding path program 3 times [2024-06-27 20:32:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972713144] [2024-06-27 20:32:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:58,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:58,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972713144] [2024-06-27 20:32:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972713144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:58,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288555157] [2024-06-27 20:32:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:58,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:58,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:58,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:58,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 116 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:58,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:58,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:58,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:59,344 INFO L124 PetriNetUnfolderBase]: 1874/2925 cut-off events. [2024-06-27 20:32:59,344 INFO L125 PetriNetUnfolderBase]: For 30794/30805 co-relation queries the response was YES. [2024-06-27 20:32:59,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 2925 events. 1874/2925 cut-off events. For 30794/30805 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14635 event pairs, 576 based on Foata normal form. 9/2919 useless extension candidates. Maximal degree in co-relation 13844. Up to 2332 conditions per place. [2024-06-27 20:32:59,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 62 changer transitions 0/139 dead transitions. [2024-06-27 20:32:59,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 1380 flow [2024-06-27 20:32:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:32:59,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:32:59,361 INFO L175 Difference]: Start difference. First operand has 87 places, 116 transitions, 1038 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:32:59,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 1380 flow [2024-06-27 20:32:59,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1242 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:59,384 INFO L231 Difference]: Finished difference. Result has 90 places, 116 transitions, 1035 flow [2024-06-27 20:32:59,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=90, PETRI_TRANSITIONS=116} [2024-06-27 20:32:59,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:32:59,385 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 116 transitions, 1035 flow [2024-06-27 20:32:59,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:32:59,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:59,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:32:59,385 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:59,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1203686752, now seen corresponding path program 1 times [2024-06-27 20:32:59,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:59,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56809854] [2024-06-27 20:32:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56809854] [2024-06-27 20:32:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56809854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:32:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753170117] [2024-06-27 20:32:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:32:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:32:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:32:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 116 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:00,314 INFO L124 PetriNetUnfolderBase]: 1871/2935 cut-off events. [2024-06-27 20:33:00,315 INFO L125 PetriNetUnfolderBase]: For 33584/33586 co-relation queries the response was YES. [2024-06-27 20:33:00,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14022 conditions, 2935 events. 1871/2935 cut-off events. For 33584/33586 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14800 event pairs, 671 based on Foata normal form. 1/2933 useless extension candidates. Maximal degree in co-relation 13984. Up to 2765 conditions per place. [2024-06-27 20:33:00,331 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 11 changer transitions 0/128 dead transitions. [2024-06-27 20:33:00,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1333 flow [2024-06-27 20:33:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:33:00,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:33:00,332 INFO L175 Difference]: Start difference. First operand has 90 places, 116 transitions, 1035 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:33:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1333 flow [2024-06-27 20:33:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1150 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:00,359 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 912 flow [2024-06-27 20:33:00,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-27 20:33:00,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 20:33:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 912 flow [2024-06-27 20:33:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:00,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:33:00,361 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1191412871, now seen corresponding path program 1 times [2024-06-27 20:33:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969644105] [2024-06-27 20:33:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:00,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:00,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969644105] [2024-06-27 20:33:00,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969644105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:00,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:00,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492689725] [2024-06-27 20:33:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:00,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:00,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:01,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:01,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:33:01,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:01,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:01,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:01,478 INFO L124 PetriNetUnfolderBase]: 1951/3023 cut-off events. [2024-06-27 20:33:01,479 INFO L125 PetriNetUnfolderBase]: For 41731/41736 co-relation queries the response was YES. [2024-06-27 20:33:01,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14969 conditions, 3023 events. 1951/3023 cut-off events. For 41731/41736 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15226 event pairs, 476 based on Foata normal form. 6/3025 useless extension candidates. Maximal degree in co-relation 14930. Up to 2613 conditions per place. [2024-06-27 20:33:01,495 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-27 20:33:01,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 149 transitions, 1384 flow [2024-06-27 20:33:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:33:01,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:33:01,496 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 912 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:33:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 149 transitions, 1384 flow [2024-06-27 20:33:01,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1346 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:01,520 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 993 flow [2024-06-27 20:33:01,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2024-06-27 20:33:01,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 20:33:01,521 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 993 flow [2024-06-27 20:33:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:33:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:33:01,522 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:01,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:01,522 INFO L85 PathProgramCache]: Analyzing trace with hash -299169663, now seen corresponding path program 2 times [2024-06-27 20:33:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693239312] [2024-06-27 20:33:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:02,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:02,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693239312] [2024-06-27 20:33:02,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693239312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:02,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:02,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834988244] [2024-06-27 20:33:02,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:02,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:02,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:02,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 993 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:33:02,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:02,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:02,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:02,725 INFO L124 PetriNetUnfolderBase]: 1943/3010 cut-off events. [2024-06-27 20:33:02,725 INFO L125 PetriNetUnfolderBase]: For 45960/45965 co-relation queries the response was YES. [2024-06-27 20:33:02,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15373 conditions, 3010 events. 1943/3010 cut-off events. For 45960/45965 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15107 event pairs, 614 based on Foata normal form. 6/3012 useless extension candidates. Maximal degree in co-relation 15333. Up to 2689 conditions per place. [2024-06-27 20:33:02,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-27 20:33:02,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1353 flow [2024-06-27 20:33:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:33:02,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:33:02,777 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 993 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:33:02,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1353 flow [2024-06-27 20:33:02,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 147 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:02,805 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1008 flow [2024-06-27 20:33:02,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1008, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-27 20:33:02,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:33:02,806 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1008 flow [2024-06-27 20:33:02,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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 20:33:02,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:02,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:33:02,807 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:02,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash -183693795, now seen corresponding path program 1 times [2024-06-27 20:33:02,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:02,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951775641] [2024-06-27 20:33:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:03,915 INFO 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 20:33:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:03,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951775641] [2024-06-27 20:33:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951775641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:03,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:03,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:03,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375527759] [2024-06-27 20:33:03,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:03,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:04,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:04,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1008 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:04,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:04,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:04,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:04,741 INFO L124 PetriNetUnfolderBase]: 2035/3158 cut-off events. [2024-06-27 20:33:04,742 INFO L125 PetriNetUnfolderBase]: For 54655/54660 co-relation queries the response was YES. [2024-06-27 20:33:04,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16302 conditions, 3158 events. 2035/3158 cut-off events. For 54655/54660 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16123 event pairs, 552 based on Foata normal form. 24/3178 useless extension candidates. Maximal degree in co-relation 16260. Up to 2389 conditions per place. [2024-06-27 20:33:04,757 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 70 changer transitions 0/160 dead transitions. [2024-06-27 20:33:04,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1454 flow [2024-06-27 20:33:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:33:04,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:33:04,759 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1008 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:33:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1454 flow [2024-06-27 20:33:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 160 transitions, 1379 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:04,789 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1115 flow [2024-06-27 20:33:04,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-27 20:33:04,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:33:04,790 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1115 flow [2024-06-27 20:33:04,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:04,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:04,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:04,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:33:04,790 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:04,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:04,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1351856415, now seen corresponding path program 1 times [2024-06-27 20:33:04,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:04,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520837701] [2024-06-27 20:33:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:05,322 INFO 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 20:33:05,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:05,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520837701] [2024-06-27 20:33:05,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520837701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:05,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:05,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384904668] [2024-06-27 20:33:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:05,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:05,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:05,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:05,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:05,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:05,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:05,758 INFO L124 PetriNetUnfolderBase]: 2068/3206 cut-off events. [2024-06-27 20:33:05,759 INFO L125 PetriNetUnfolderBase]: For 56112/56118 co-relation queries the response was YES. [2024-06-27 20:33:05,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17109 conditions, 3206 events. 2068/3206 cut-off events. For 56112/56118 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16288 event pairs, 651 based on Foata normal form. 7/3210 useless extension candidates. Maximal degree in co-relation 17066. Up to 3012 conditions per place. [2024-06-27 20:33:05,780 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2024-06-27 20:33:05,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 144 transitions, 1473 flow [2024-06-27 20:33:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:33:05,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:33:05,784 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1115 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:33:05,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 144 transitions, 1473 flow [2024-06-27 20:33:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1325 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:05,821 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1034 flow [2024-06-27 20:33:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1034, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-06-27 20:33:05,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:33:05,822 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1034 flow [2024-06-27 20:33:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:05,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:33:05,823 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 913099573, now seen corresponding path program 2 times [2024-06-27 20:33:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351736292] [2024-06-27 20:33:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:06,753 INFO 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 20:33:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:06,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351736292] [2024-06-27 20:33:06,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351736292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:06,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:06,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584399402] [2024-06-27 20:33:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:06,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:06,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:06,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1034 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:06,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:06,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:06,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:07,456 INFO L124 PetriNetUnfolderBase]: 2085/3205 cut-off events. [2024-06-27 20:33:07,456 INFO L125 PetriNetUnfolderBase]: For 60693/60701 co-relation queries the response was YES. [2024-06-27 20:33:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17283 conditions, 3205 events. 2085/3205 cut-off events. For 60693/60701 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16164 event pairs, 572 based on Foata normal form. 5/3184 useless extension candidates. Maximal degree in co-relation 17239. Up to 2600 conditions per place. [2024-06-27 20:33:07,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 74 changer transitions 0/159 dead transitions. [2024-06-27 20:33:07,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1464 flow [2024-06-27 20:33:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:33:07,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:33:07,479 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1034 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:33:07,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1464 flow [2024-06-27 20:33:07,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1421 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:07,526 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1183 flow [2024-06-27 20:33:07,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-27 20:33:07,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:33:07,527 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1183 flow [2024-06-27 20:33:07,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:07,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:07,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:33:07,528 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:07,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1883058163, now seen corresponding path program 3 times [2024-06-27 20:33:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833376360] [2024-06-27 20:33:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:08,288 INFO 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 20:33:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833376360] [2024-06-27 20:33:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833376360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:08,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:08,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:08,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76969592] [2024-06-27 20:33:08,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:08,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:08,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1183 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:08,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:08,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:08,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:08,915 INFO L124 PetriNetUnfolderBase]: 2102/3232 cut-off events. [2024-06-27 20:33:08,916 INFO L125 PetriNetUnfolderBase]: For 67571/67579 co-relation queries the response was YES. [2024-06-27 20:33:08,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 3232 events. 2102/3232 cut-off events. For 67571/67579 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16333 event pairs, 518 based on Foata normal form. 5/3211 useless extension candidates. Maximal degree in co-relation 18203. Up to 2389 conditions per place. [2024-06-27 20:33:08,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 81 changer transitions 0/169 dead transitions. [2024-06-27 20:33:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 169 transitions, 1773 flow [2024-06-27 20:33:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:33:08,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:33:08,939 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1183 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:33:08,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 169 transitions, 1773 flow [2024-06-27 20:33:08,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 169 transitions, 1601 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:08,981 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1256 flow [2024-06-27 20:33:08,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-06-27 20:33:08,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 20:33:08,982 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1256 flow [2024-06-27 20:33:08,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:08,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:08,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:08,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:33:08,983 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:08,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1646586133, now seen corresponding path program 4 times [2024-06-27 20:33:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:08,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847554679] [2024-06-27 20:33:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:09,813 INFO 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 20:33:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847554679] [2024-06-27 20:33:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847554679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:09,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:09,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77885847] [2024-06-27 20:33:09,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:09,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:09,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1256 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:09,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:09,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:09,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:10,518 INFO L124 PetriNetUnfolderBase]: 2094/3224 cut-off events. [2024-06-27 20:33:10,518 INFO L125 PetriNetUnfolderBase]: For 72779/72787 co-relation queries the response was YES. [2024-06-27 20:33:10,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18477 conditions, 3224 events. 2094/3224 cut-off events. For 72779/72787 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16269 event pairs, 582 based on Foata normal form. 5/3203 useless extension candidates. Maximal degree in co-relation 18431. Up to 2615 conditions per place. [2024-06-27 20:33:10,542 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 72 changer transitions 0/163 dead transitions. [2024-06-27 20:33:10,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1660 flow [2024-06-27 20:33:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:33:10,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:33:10,543 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1256 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:33:10,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1660 flow [2024-06-27 20:33:10,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1468 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:10,608 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1216 flow [2024-06-27 20:33:10,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1216, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-27 20:33:10,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 20:33:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1216 flow [2024-06-27 20:33:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:10,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:10,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:33:10,609 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:10,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash -536965305, now seen corresponding path program 2 times [2024-06-27 20:33:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:10,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166908201] [2024-06-27 20:33:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:11,205 INFO 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 20:33:11,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:11,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166908201] [2024-06-27 20:33:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166908201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:11,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698653621] [2024-06-27 20:33:11,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:11,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:11,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:11,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:11,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:11,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1216 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:11,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:11,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:11,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:11,628 INFO L124 PetriNetUnfolderBase]: 2091/3249 cut-off events. [2024-06-27 20:33:11,629 INFO L125 PetriNetUnfolderBase]: For 75784/75802 co-relation queries the response was YES. [2024-06-27 20:33:11,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18430 conditions, 3249 events. 2091/3249 cut-off events. For 75784/75802 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16527 event pairs, 644 based on Foata normal form. 13/3255 useless extension candidates. Maximal degree in co-relation 18383. Up to 3044 conditions per place. [2024-06-27 20:33:11,649 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 124 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-27 20:33:11,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1574 flow [2024-06-27 20:33:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:33:11,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:33:11,664 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1216 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:33:11,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1574 flow [2024-06-27 20:33:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1399 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:11,721 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1125 flow [2024-06-27 20:33:11,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-27 20:33:11,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:33:11,722 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1125 flow [2024-06-27 20:33:11,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:11,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:11,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:11,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:33:11,739 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:11,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash -516610953, now seen corresponding path program 1 times [2024-06-27 20:33:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526178471] [2024-06-27 20:33:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:12,356 INFO 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 20:33:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526178471] [2024-06-27 20:33:12,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526178471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:12,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:12,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825061030] [2024-06-27 20:33:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:12,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:12,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:12,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:12,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:12,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:12,780 INFO L124 PetriNetUnfolderBase]: 1889/3017 cut-off events. [2024-06-27 20:33:12,781 INFO L125 PetriNetUnfolderBase]: For 69237/69239 co-relation queries the response was YES. [2024-06-27 20:33:12,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16741 conditions, 3017 events. 1889/3017 cut-off events. For 69237/69239 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15830 event pairs, 598 based on Foata normal form. 1/3015 useless extension candidates. Maximal degree in co-relation 16693. Up to 2773 conditions per place. [2024-06-27 20:33:12,800 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 134 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-06-27 20:33:12,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1481 flow [2024-06-27 20:33:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:33:12,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:33:12,802 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1125 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:33:12,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1481 flow [2024-06-27 20:33:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1419 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:12,863 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1127 flow [2024-06-27 20:33:12,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1127, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-27 20:33:12,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:33:12,863 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1127 flow [2024-06-27 20:33:12,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:33:12,864 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:12,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1340422623, now seen corresponding path program 2 times [2024-06-27 20:33:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736613100] [2024-06-27 20:33:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:13,466 INFO 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 20:33:13,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736613100] [2024-06-27 20:33:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736613100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:13,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:33:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835620778] [2024-06-27 20:33:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:33:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:33:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:33:13,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:13,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:13,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:13,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:13,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:13,860 INFO L124 PetriNetUnfolderBase]: 1886/3014 cut-off events. [2024-06-27 20:33:13,861 INFO L125 PetriNetUnfolderBase]: For 73778/73783 co-relation queries the response was YES. [2024-06-27 20:33:13,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3014 events. 1886/3014 cut-off events. For 73778/73783 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15830 event pairs, 602 based on Foata normal form. 3/3013 useless extension candidates. Maximal degree in co-relation 17056. Up to 2763 conditions per place. [2024-06-27 20:33:13,879 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 129 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-27 20:33:13,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1479 flow [2024-06-27 20:33:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:33:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:33:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:33:13,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-27 20:33:13,880 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1127 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:33:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1479 flow [2024-06-27 20:33:13,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 152 transitions, 1437 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:13,932 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1165 flow [2024-06-27 20:33:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1165, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-27 20:33:13,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 20:33:13,932 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1165 flow [2024-06-27 20:33:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:13,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:13,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:33:13,933 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash -536951417, now seen corresponding path program 1 times [2024-06-27 20:33:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670813741] [2024-06-27 20:33:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:14,514 INFO 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 20:33:14,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:14,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670813741] [2024-06-27 20:33:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670813741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:14,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:14,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274686930] [2024-06-27 20:33:14,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:14,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:14,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:14,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1165 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:14,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:14,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:14,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:14,927 INFO L124 PetriNetUnfolderBase]: 1999/3125 cut-off events. [2024-06-27 20:33:14,927 INFO L125 PetriNetUnfolderBase]: For 78264/78266 co-relation queries the response was YES. [2024-06-27 20:33:14,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17991 conditions, 3125 events. 1999/3125 cut-off events. For 78264/78266 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15958 event pairs, 643 based on Foata normal form. 1/3123 useless extension candidates. Maximal degree in co-relation 17941. Up to 2973 conditions per place. [2024-06-27 20:33:14,946 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 137 selfloop transitions, 14 changer transitions 0/156 dead transitions. [2024-06-27 20:33:14,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 156 transitions, 1533 flow [2024-06-27 20:33:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:33:14,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 20:33:14,947 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1165 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:33:14,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 156 transitions, 1533 flow [2024-06-27 20:33:14,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 156 transitions, 1475 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:14,989 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1185 flow [2024-06-27 20:33:14,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-27 20:33:14,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-27 20:33:14,990 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1185 flow [2024-06-27 20:33:14,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:14,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:14,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:14,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:33:14,991 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:14,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1720907661, now seen corresponding path program 1 times [2024-06-27 20:33:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977204299] [2024-06-27 20:33:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:14,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:15,635 INFO 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 20:33:15,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977204299] [2024-06-27 20:33:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977204299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:15,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132139669] [2024-06-27 20:33:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:15,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:15,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1185 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:15,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:15,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:16,336 INFO L124 PetriNetUnfolderBase]: 2216/3456 cut-off events. [2024-06-27 20:33:16,337 INFO L125 PetriNetUnfolderBase]: For 107992/107997 co-relation queries the response was YES. [2024-06-27 20:33:16,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20981 conditions, 3456 events. 2216/3456 cut-off events. For 107992/107997 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17910 event pairs, 437 based on Foata normal form. 16/3468 useless extension candidates. Maximal degree in co-relation 20930. Up to 2141 conditions per place. [2024-06-27 20:33:16,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 113 selfloop transitions, 68 changer transitions 0/187 dead transitions. [2024-06-27 20:33:16,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1809 flow [2024-06-27 20:33:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:33:16,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:33:16,363 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1185 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:33:16,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1809 flow [2024-06-27 20:33:16,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 187 transitions, 1753 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:16,424 INFO L231 Difference]: Finished difference. Result has 116 places, 148 transitions, 1321 flow [2024-06-27 20:33:16,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=116, PETRI_TRANSITIONS=148} [2024-06-27 20:33:16,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:33:16,425 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 148 transitions, 1321 flow [2024-06-27 20:33:16,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:16,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:16,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:16,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:33:16,426 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:16,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:16,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1722781611, now seen corresponding path program 2 times [2024-06-27 20:33:16,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:16,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224316728] [2024-06-27 20:33:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:16,951 INFO 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 20:33:16,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:16,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224316728] [2024-06-27 20:33:16,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224316728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:16,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:16,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78410876] [2024-06-27 20:33:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:16,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:17,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:17,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 148 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:17,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:17,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:17,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:17,593 INFO L124 PetriNetUnfolderBase]: 2274/3549 cut-off events. [2024-06-27 20:33:17,594 INFO L125 PetriNetUnfolderBase]: For 116595/116600 co-relation queries the response was YES. [2024-06-27 20:33:17,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22011 conditions, 3549 events. 2274/3549 cut-off events. For 116595/116600 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18487 event pairs, 619 based on Foata normal form. 16/3561 useless extension candidates. Maximal degree in co-relation 21959. Up to 2648 conditions per place. [2024-06-27 20:33:17,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 71 changer transitions 0/187 dead transitions. [2024-06-27 20:33:17,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 1827 flow [2024-06-27 20:33:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:33:17,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:33:17,623 INFO L175 Difference]: Start difference. First operand has 116 places, 148 transitions, 1321 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:33:17,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 1827 flow [2024-06-27 20:33:17,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 1744 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:17,709 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1414 flow [2024-06-27 20:33:17,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1414, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-27 20:33:17,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 20:33:17,710 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1414 flow [2024-06-27 20:33:17,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:17,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:17,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:33:17,710 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:17,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash 702660079, now seen corresponding path program 1 times [2024-06-27 20:33:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196794805] [2024-06-27 20:33:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:18,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:18,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196794805] [2024-06-27 20:33:18,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196794805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:18,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:18,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181891407] [2024-06-27 20:33:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:18,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1414 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:18,874 INFO L124 PetriNetUnfolderBase]: 2284/3572 cut-off events. [2024-06-27 20:33:18,875 INFO L125 PetriNetUnfolderBase]: For 119542/119551 co-relation queries the response was YES. [2024-06-27 20:33:18,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 3572 events. 2284/3572 cut-off events. For 119542/119551 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18706 event pairs, 698 based on Foata normal form. 10/3578 useless extension candidates. Maximal degree in co-relation 22597. Up to 3248 conditions per place. [2024-06-27 20:33:18,901 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-06-27 20:33:18,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1882 flow [2024-06-27 20:33:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:33:18,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:33:18,903 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1414 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:33:18,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1882 flow [2024-06-27 20:33:18,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 176 transitions, 1724 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:18,983 INFO L231 Difference]: Finished difference. Result has 121 places, 153 transitions, 1392 flow [2024-06-27 20:33:18,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=121, PETRI_TRANSITIONS=153} [2024-06-27 20:33:18,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 20:33:18,983 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 153 transitions, 1392 flow [2024-06-27 20:33:18,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:18,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:18,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:33:18,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:18,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1405264989, now seen corresponding path program 3 times [2024-06-27 20:33:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:18,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569422714] [2024-06-27 20:33:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:19,620 INFO 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 20:33:19,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:19,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569422714] [2024-06-27 20:33:19,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569422714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:19,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:19,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:19,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904294915] [2024-06-27 20:33:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:19,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 153 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:19,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:19,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:19,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:20,385 INFO L124 PetriNetUnfolderBase]: 2403/3787 cut-off events. [2024-06-27 20:33:20,385 INFO L125 PetriNetUnfolderBase]: For 137059/137068 co-relation queries the response was YES. [2024-06-27 20:33:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24199 conditions, 3787 events. 2403/3787 cut-off events. For 137059/137068 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20288 event pairs, 513 based on Foata normal form. 22/3805 useless extension candidates. Maximal degree in co-relation 24144. Up to 2765 conditions per place. [2024-06-27 20:33:20,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 73 changer transitions 0/198 dead transitions. [2024-06-27 20:33:20,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 198 transitions, 2076 flow [2024-06-27 20:33:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:33:20,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:33:20,412 INFO L175 Difference]: Start difference. First operand has 121 places, 153 transitions, 1392 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:33:20,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 198 transitions, 2076 flow [2024-06-27 20:33:20,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 198 transitions, 1970 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:20,495 INFO L231 Difference]: Finished difference. Result has 124 places, 155 transitions, 1496 flow [2024-06-27 20:33:20,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=124, PETRI_TRANSITIONS=155} [2024-06-27 20:33:20,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 20:33:20,496 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 155 transitions, 1496 flow [2024-06-27 20:33:20,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:20,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:20,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:20,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:33:20,496 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1088680265, now seen corresponding path program 4 times [2024-06-27 20:33:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718589433] [2024-06-27 20:33:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:21,054 INFO 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 20:33:21,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:21,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718589433] [2024-06-27 20:33:21,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718589433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:21,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:21,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:21,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885987230] [2024-06-27 20:33:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:21,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:21,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 155 transitions, 1496 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:21,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:21,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:21,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:21,957 INFO L124 PetriNetUnfolderBase]: 2478/3912 cut-off events. [2024-06-27 20:33:21,957 INFO L125 PetriNetUnfolderBase]: For 149715/149724 co-relation queries the response was YES. [2024-06-27 20:33:21,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25350 conditions, 3912 events. 2478/3912 cut-off events. For 149715/149724 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21247 event pairs, 682 based on Foata normal form. 26/3934 useless extension candidates. Maximal degree in co-relation 25294. Up to 3141 conditions per place. [2024-06-27 20:33:21,984 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 70 changer transitions 0/195 dead transitions. [2024-06-27 20:33:21,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 2032 flow [2024-06-27 20:33:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:33:21,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:33:21,986 INFO L175 Difference]: Start difference. First operand has 124 places, 155 transitions, 1496 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:33:21,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 2032 flow [2024-06-27 20:33:22,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 195 transitions, 1926 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:22,081 INFO L231 Difference]: Finished difference. Result has 128 places, 156 transitions, 1571 flow [2024-06-27 20:33:22,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1571, PETRI_PLACES=128, PETRI_TRANSITIONS=156} [2024-06-27 20:33:22,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 20:33:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 156 transitions, 1571 flow [2024-06-27 20:33:22,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:22,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:22,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:22,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:33:22,082 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1399754739, now seen corresponding path program 5 times [2024-06-27 20:33:22,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:22,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132376305] [2024-06-27 20:33:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:22,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:22,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132376305] [2024-06-27 20:33:22,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132376305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:22,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:22,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:22,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92773907] [2024-06-27 20:33:22,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:22,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:22,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:22,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:22,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 156 transitions, 1571 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:22,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:22,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:23,598 INFO L124 PetriNetUnfolderBase]: 2553/4031 cut-off events. [2024-06-27 20:33:23,598 INFO L125 PetriNetUnfolderBase]: For 158586/158591 co-relation queries the response was YES. [2024-06-27 20:33:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26368 conditions, 4031 events. 2553/4031 cut-off events. For 158586/158591 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22132 event pairs, 678 based on Foata normal form. 20/4047 useless extension candidates. Maximal degree in co-relation 26310. Up to 3266 conditions per place. [2024-06-27 20:33:23,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 66 changer transitions 0/193 dead transitions. [2024-06-27 20:33:23,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 193 transitions, 2091 flow [2024-06-27 20:33:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:33:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:33:23,632 INFO L175 Difference]: Start difference. First operand has 128 places, 156 transitions, 1571 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:33:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 193 transitions, 2091 flow [2024-06-27 20:33:23,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 1940 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:23,753 INFO L231 Difference]: Finished difference. Result has 130 places, 157 transitions, 1593 flow [2024-06-27 20:33:23,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1593, PETRI_PLACES=130, PETRI_TRANSITIONS=157} [2024-06-27 20:33:23,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:33:23,754 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 157 transitions, 1593 flow [2024-06-27 20:33:23,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:23,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:23,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:23,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:33:23,754 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:23,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1094257847, now seen corresponding path program 1 times [2024-06-27 20:33:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689812956] [2024-06-27 20:33:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:23,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:24,692 INFO 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 20:33:24,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:24,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689812956] [2024-06-27 20:33:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689812956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:24,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329007535] [2024-06-27 20:33:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:24,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:24,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:24,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 157 transitions, 1593 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:24,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:24,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:24,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:25,491 INFO L124 PetriNetUnfolderBase]: 2594/4112 cut-off events. [2024-06-27 20:33:25,492 INFO L125 PetriNetUnfolderBase]: For 163914/163919 co-relation queries the response was YES. [2024-06-27 20:33:25,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26878 conditions, 4112 events. 2594/4112 cut-off events. For 163914/163919 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22844 event pairs, 684 based on Foata normal form. 12/4120 useless extension candidates. Maximal degree in co-relation 26819. Up to 2932 conditions per place. [2024-06-27 20:33:25,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 69 changer transitions 0/195 dead transitions. [2024-06-27 20:33:25,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2121 flow [2024-06-27 20:33:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:33:25,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:33:25,524 INFO L175 Difference]: Start difference. First operand has 130 places, 157 transitions, 1593 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:33:25,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2121 flow [2024-06-27 20:33:25,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 195 transitions, 1976 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:25,658 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1625 flow [2024-06-27 20:33:25,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1625, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-27 20:33:25,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 20:33:25,659 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1625 flow [2024-06-27 20:33:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:25,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:25,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:33:25,659 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:25,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1042125357, now seen corresponding path program 2 times [2024-06-27 20:33:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633888322] [2024-06-27 20:33:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:26,273 INFO 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 20:33:26,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633888322] [2024-06-27 20:33:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633888322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:26,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:26,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158829835] [2024-06-27 20:33:26,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:26,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:26,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1625 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:26,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:26,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:26,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:26,884 INFO L124 PetriNetUnfolderBase]: 2622/4154 cut-off events. [2024-06-27 20:33:26,884 INFO L125 PetriNetUnfolderBase]: For 167862/167867 co-relation queries the response was YES. [2024-06-27 20:33:26,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27381 conditions, 4154 events. 2622/4154 cut-off events. For 167862/167867 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23181 event pairs, 811 based on Foata normal form. 4/4154 useless extension candidates. Maximal degree in co-relation 27321. Up to 3771 conditions per place. [2024-06-27 20:33:26,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 38 changer transitions 0/183 dead transitions. [2024-06-27 20:33:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 2211 flow [2024-06-27 20:33:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:33:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:33:26,918 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1625 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:33:26,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 2211 flow [2024-06-27 20:33:27,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 183 transitions, 2054 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:27,058 INFO L231 Difference]: Finished difference. Result has 134 places, 166 transitions, 1691 flow [2024-06-27 20:33:27,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=134, PETRI_TRANSITIONS=166} [2024-06-27 20:33:27,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 20:33:27,058 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 166 transitions, 1691 flow [2024-06-27 20:33:27,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:27,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:27,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:33:27,059 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:27,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1042125729, now seen corresponding path program 1 times [2024-06-27 20:33:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684241623] [2024-06-27 20:33:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:27,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684241623] [2024-06-27 20:33:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684241623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:27,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:27,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723213564] [2024-06-27 20:33:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:27,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:27,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 166 transitions, 1691 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:27,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:27,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:28,257 INFO L124 PetriNetUnfolderBase]: 2733/4275 cut-off events. [2024-06-27 20:33:28,257 INFO L125 PetriNetUnfolderBase]: For 176351/176357 co-relation queries the response was YES. [2024-06-27 20:33:28,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28430 conditions, 4275 events. 2733/4275 cut-off events. For 176351/176357 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23443 event pairs, 861 based on Foata normal form. 7/4279 useless extension candidates. Maximal degree in co-relation 28368. Up to 4128 conditions per place. [2024-06-27 20:33:28,288 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2024-06-27 20:33:28,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 186 transitions, 2157 flow [2024-06-27 20:33:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:33:28,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 20:33:28,290 INFO L175 Difference]: Start difference. First operand has 134 places, 166 transitions, 1691 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:33:28,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 186 transitions, 2157 flow [2024-06-27 20:33:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 2069 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:28,420 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1693 flow [2024-06-27 20:33:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-27 20:33:28,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 20:33:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1693 flow [2024-06-27 20:33:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:28,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:33:28,422 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:28,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2015399209, now seen corresponding path program 6 times [2024-06-27 20:33:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261683189] [2024-06-27 20:33:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:29,052 INFO 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 20:33:29,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261683189] [2024-06-27 20:33:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261683189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:29,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221513787] [2024-06-27 20:33:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:29,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:29,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1693 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:29,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:29,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:29,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:29,899 INFO L124 PetriNetUnfolderBase]: 2603/4121 cut-off events. [2024-06-27 20:33:29,899 INFO L125 PetriNetUnfolderBase]: For 184702/184713 co-relation queries the response was YES. [2024-06-27 20:33:29,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27557 conditions, 4121 events. 2603/4121 cut-off events. For 184702/184713 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22815 event pairs, 693 based on Foata normal form. 23/4129 useless extension candidates. Maximal degree in co-relation 27493. Up to 3343 conditions per place. [2024-06-27 20:33:29,931 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 63 changer transitions 0/201 dead transitions. [2024-06-27 20:33:29,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 201 transitions, 2189 flow [2024-06-27 20:33:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:33:29,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:33:29,932 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1693 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:33:29,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 201 transitions, 2189 flow [2024-06-27 20:33:30,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 201 transitions, 2109 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:30,075 INFO L231 Difference]: Finished difference. Result has 141 places, 169 transitions, 1748 flow [2024-06-27 20:33:30,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1748, PETRI_PLACES=141, PETRI_TRANSITIONS=169} [2024-06-27 20:33:30,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 20:33:30,076 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 169 transitions, 1748 flow [2024-06-27 20:33:30,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:30,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:30,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:30,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:33:30,077 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:30,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1983642919, now seen corresponding path program 2 times [2024-06-27 20:33:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:30,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534700552] [2024-06-27 20:33:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:30,932 INFO 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 20:33:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534700552] [2024-06-27 20:33:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534700552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:30,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039828776] [2024-06-27 20:33:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:31,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:31,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 169 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:31,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:31,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:31,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:31,770 INFO L124 PetriNetUnfolderBase]: 2583/4085 cut-off events. [2024-06-27 20:33:31,770 INFO L125 PetriNetUnfolderBase]: For 181987/181998 co-relation queries the response was YES. [2024-06-27 20:33:31,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27414 conditions, 4085 events. 2583/4085 cut-off events. For 181987/181998 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22532 event pairs, 670 based on Foata normal form. 15/4085 useless extension candidates. Maximal degree in co-relation 27349. Up to 3221 conditions per place. [2024-06-27 20:33:31,803 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 65 changer transitions 0/203 dead transitions. [2024-06-27 20:33:31,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 2258 flow [2024-06-27 20:33:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:33:31,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:33:31,805 INFO L175 Difference]: Start difference. First operand has 141 places, 169 transitions, 1748 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:33:31,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 2258 flow [2024-06-27 20:33:31,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2103 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:31,947 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1729 flow [2024-06-27 20:33:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1729, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-27 20:33:31,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 20:33:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1729 flow [2024-06-27 20:33:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:31,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:33:31,949 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1974446149, now seen corresponding path program 3 times [2024-06-27 20:33:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507088497] [2024-06-27 20:33:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:32,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:32,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507088497] [2024-06-27 20:33:32,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507088497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:32,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:32,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864541201] [2024-06-27 20:33:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:32,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:32,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:32,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1729 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:32,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:32,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:32,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:33,481 INFO L124 PetriNetUnfolderBase]: 2563/4053 cut-off events. [2024-06-27 20:33:33,481 INFO L125 PetriNetUnfolderBase]: For 182283/182294 co-relation queries the response was YES. [2024-06-27 20:33:33,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26895 conditions, 4053 events. 2563/4053 cut-off events. For 182283/182294 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22320 event pairs, 610 based on Foata normal form. 15/4053 useless extension candidates. Maximal degree in co-relation 26829. Up to 2539 conditions per place. [2024-06-27 20:33:33,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 73 changer transitions 0/202 dead transitions. [2024-06-27 20:33:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 202 transitions, 2175 flow [2024-06-27 20:33:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:33:33,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:33:33,522 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1729 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:33:33,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 202 transitions, 2175 flow [2024-06-27 20:33:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 202 transitions, 1943 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:33,648 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1587 flow [2024-06-27 20:33:33,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1587, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-27 20:33:33,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 20:33:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1587 flow [2024-06-27 20:33:33,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:33,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:33,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:33,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:33:33,650 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:33,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1516611331, now seen corresponding path program 2 times [2024-06-27 20:33:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:33,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704280899] [2024-06-27 20:33:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:33,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:34,211 INFO 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 20:33:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704280899] [2024-06-27 20:33:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704280899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:34,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:34,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282188867] [2024-06-27 20:33:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:34,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:34,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1587 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:34,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:34,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:34,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:34,774 INFO L124 PetriNetUnfolderBase]: 2662/4167 cut-off events. [2024-06-27 20:33:34,774 INFO L125 PetriNetUnfolderBase]: For 182202/182220 co-relation queries the response was YES. [2024-06-27 20:33:34,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27136 conditions, 4167 events. 2662/4167 cut-off events. For 182202/182220 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22697 event pairs, 801 based on Foata normal form. 13/4173 useless extension candidates. Maximal degree in co-relation 27070. Up to 3999 conditions per place. [2024-06-27 20:33:34,809 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 154 selfloop transitions, 29 changer transitions 0/187 dead transitions. [2024-06-27 20:33:34,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 187 transitions, 2179 flow [2024-06-27 20:33:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:33:34,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 20:33:34,810 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1587 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:33:34,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 187 transitions, 2179 flow [2024-06-27 20:33:34,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 187 transitions, 1974 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:34,944 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1556 flow [2024-06-27 20:33:34,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1556, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2024-06-27 20:33:34,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 20:33:34,945 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1556 flow [2024-06-27 20:33:34,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:34,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:33:34,949 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:34,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1396388769, now seen corresponding path program 3 times [2024-06-27 20:33:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317128469] [2024-06-27 20:33:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:35,587 INFO 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 20:33:35,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317128469] [2024-06-27 20:33:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317128469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667011722] [2024-06-27 20:33:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:35,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:35,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1556 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:35,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:35,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:35,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:36,241 INFO L124 PetriNetUnfolderBase]: 2659/4163 cut-off events. [2024-06-27 20:33:36,241 INFO L125 PetriNetUnfolderBase]: For 189398/189416 co-relation queries the response was YES. [2024-06-27 20:33:36,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26748 conditions, 4163 events. 2659/4163 cut-off events. For 189398/189416 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22662 event pairs, 801 based on Foata normal form. 13/4169 useless extension candidates. Maximal degree in co-relation 26682. Up to 3996 conditions per place. [2024-06-27 20:33:36,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 154 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-27 20:33:36,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1960 flow [2024-06-27 20:33:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 20:33:36,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 20:33:36,272 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1556 flow. Second operand 7 states and 110 transitions. [2024-06-27 20:33:36,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1960 flow [2024-06-27 20:33:36,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 1857 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:36,388 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1515 flow [2024-06-27 20:33:36,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-06-27 20:33:36,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 20:33:36,390 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1515 flow [2024-06-27 20:33:36,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:36,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:36,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:33:36,390 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1396388397, now seen corresponding path program 3 times [2024-06-27 20:33:36,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:36,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821934892] [2024-06-27 20:33:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821934892] [2024-06-27 20:33:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821934892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:36,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:36,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199562224] [2024-06-27 20:33:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:36,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:36,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:37,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:37,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:37,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:37,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:37,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:37,528 INFO L124 PetriNetUnfolderBase]: 2569/4063 cut-off events. [2024-06-27 20:33:37,529 INFO L125 PetriNetUnfolderBase]: For 198162/198173 co-relation queries the response was YES. [2024-06-27 20:33:37,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26516 conditions, 4063 events. 2569/4063 cut-off events. For 198162/198173 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22353 event pairs, 781 based on Foata normal form. 5/4053 useless extension candidates. Maximal degree in co-relation 26448. Up to 3645 conditions per place. [2024-06-27 20:33:37,561 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 51 changer transitions 0/195 dead transitions. [2024-06-27 20:33:37,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 195 transitions, 2227 flow [2024-06-27 20:33:37,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:33:37,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:33:37,562 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1515 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:33:37,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 195 transitions, 2227 flow [2024-06-27 20:33:37,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 195 transitions, 2153 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:37,675 INFO L231 Difference]: Finished difference. Result has 147 places, 182 transitions, 1705 flow [2024-06-27 20:33:37,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1705, PETRI_PLACES=147, PETRI_TRANSITIONS=182} [2024-06-27 20:33:37,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 20:33:37,675 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 182 transitions, 1705 flow [2024-06-27 20:33:37,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:37,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:37,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:33:37,676 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:37,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2111270011, now seen corresponding path program 1 times [2024-06-27 20:33:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667139611] [2024-06-27 20:33:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:38,193 INFO 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 20:33:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:38,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667139611] [2024-06-27 20:33:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667139611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:38,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:38,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:38,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387555804] [2024-06-27 20:33:38,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:38,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:38,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 182 transitions, 1705 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:38,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:38,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:38,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:38,828 INFO L124 PetriNetUnfolderBase]: 2375/3847 cut-off events. [2024-06-27 20:33:38,828 INFO L125 PetriNetUnfolderBase]: For 179957/179959 co-relation queries the response was YES. [2024-06-27 20:33:38,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25005 conditions, 3847 events. 2375/3847 cut-off events. For 179957/179959 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21719 event pairs, 677 based on Foata normal form. 2/3846 useless extension candidates. Maximal degree in co-relation 24935. Up to 3547 conditions per place. [2024-06-27 20:33:38,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 17 changer transitions 0/205 dead transitions. [2024-06-27 20:33:38,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 205 transitions, 2205 flow [2024-06-27 20:33:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:33:38,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:33:38,863 INFO L175 Difference]: Start difference. First operand has 147 places, 182 transitions, 1705 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:33:38,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 205 transitions, 2205 flow [2024-06-27 20:33:39,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2041 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:39,015 INFO L231 Difference]: Finished difference. Result has 151 places, 188 transitions, 1653 flow [2024-06-27 20:33:39,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=151, PETRI_TRANSITIONS=188} [2024-06-27 20:33:39,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 20:33:39,016 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 188 transitions, 1653 flow [2024-06-27 20:33:39,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:39,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:39,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:33:39,016 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:39,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1219441761, now seen corresponding path program 1 times [2024-06-27 20:33:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350805838] [2024-06-27 20:33:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:39,565 INFO 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 20:33:39,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350805838] [2024-06-27 20:33:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350805838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:39,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:39,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881096310] [2024-06-27 20:33:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:39,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:39,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:39,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 188 transitions, 1653 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:39,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:39,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:40,177 INFO L124 PetriNetUnfolderBase]: 2474/3948 cut-off events. [2024-06-27 20:33:40,177 INFO L125 PetriNetUnfolderBase]: For 184170/184172 co-relation queries the response was YES. [2024-06-27 20:33:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25687 conditions, 3948 events. 2474/3948 cut-off events. For 184170/184172 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21911 event pairs, 710 based on Foata normal form. 1/3946 useless extension candidates. Maximal degree in co-relation 25615. Up to 3758 conditions per place. [2024-06-27 20:33:40,207 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-27 20:33:40,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 204 transitions, 2135 flow [2024-06-27 20:33:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:33:40,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 20:33:40,208 INFO L175 Difference]: Start difference. First operand has 151 places, 188 transitions, 1653 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:33:40,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 204 transitions, 2135 flow [2024-06-27 20:33:40,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 204 transitions, 2081 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:40,359 INFO L231 Difference]: Finished difference. Result has 155 places, 191 transitions, 1685 flow [2024-06-27 20:33:40,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1685, PETRI_PLACES=155, PETRI_TRANSITIONS=191} [2024-06-27 20:33:40,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:33:40,360 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 191 transitions, 1685 flow [2024-06-27 20:33:40,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:40,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:40,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:33:40,361 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:40,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash 952756671, now seen corresponding path program 2 times [2024-06-27 20:33:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:40,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415172346] [2024-06-27 20:33:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:40,871 INFO 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 20:33:40,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:40,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415172346] [2024-06-27 20:33:40,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415172346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:40,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:40,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545842157] [2024-06-27 20:33:40,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:40,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:40,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 191 transitions, 1685 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:40,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:40,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:40,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:41,528 INFO L124 PetriNetUnfolderBase]: 2408/3889 cut-off events. [2024-06-27 20:33:41,529 INFO L125 PetriNetUnfolderBase]: For 195919/195921 co-relation queries the response was YES. [2024-06-27 20:33:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25952 conditions, 3889 events. 2408/3889 cut-off events. For 195919/195921 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21919 event pairs, 676 based on Foata normal form. 2/3888 useless extension candidates. Maximal degree in co-relation 25879. Up to 3574 conditions per place. [2024-06-27 20:33:41,566 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 178 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2024-06-27 20:33:41,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 213 transitions, 2327 flow [2024-06-27 20:33:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:33:41,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 20:33:41,568 INFO L175 Difference]: Start difference. First operand has 155 places, 191 transitions, 1685 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:33:41,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 213 transitions, 2327 flow [2024-06-27 20:33:41,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 213 transitions, 2263 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:41,755 INFO L231 Difference]: Finished difference. Result has 157 places, 197 transitions, 1781 flow [2024-06-27 20:33:41,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1781, PETRI_PLACES=157, PETRI_TRANSITIONS=197} [2024-06-27 20:33:41,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 20:33:41,756 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 197 transitions, 1781 flow [2024-06-27 20:33:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:41,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:41,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:33:41,757 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1396579791, now seen corresponding path program 2 times [2024-06-27 20:33:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:41,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503596608] [2024-06-27 20:33:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:42,343 INFO 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 20:33:42,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:42,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503596608] [2024-06-27 20:33:42,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503596608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:42,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:42,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:42,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469108870] [2024-06-27 20:33:42,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:42,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:42,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:42,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:42,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:42,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 197 transitions, 1781 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:42,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:42,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:42,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:42,954 INFO L124 PetriNetUnfolderBase]: 2497/3981 cut-off events. [2024-06-27 20:33:42,954 INFO L125 PetriNetUnfolderBase]: For 203371/203379 co-relation queries the response was YES. [2024-06-27 20:33:42,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26879 conditions, 3981 events. 2497/3981 cut-off events. For 203371/203379 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22117 event pairs, 715 based on Foata normal form. 5/3982 useless extension candidates. Maximal degree in co-relation 26805. Up to 3774 conditions per place. [2024-06-27 20:33:42,988 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 27 changer transitions 0/214 dead transitions. [2024-06-27 20:33:42,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 2429 flow [2024-06-27 20:33:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:33:42,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:33:42,990 INFO L175 Difference]: Start difference. First operand has 157 places, 197 transitions, 1781 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:33:42,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 2429 flow [2024-06-27 20:33:43,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 2355 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:43,214 INFO L231 Difference]: Finished difference. Result has 160 places, 203 transitions, 1881 flow [2024-06-27 20:33:43,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1881, PETRI_PLACES=160, PETRI_TRANSITIONS=203} [2024-06-27 20:33:43,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:33:43,214 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 203 transitions, 1881 flow [2024-06-27 20:33:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:43,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:43,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:33:43,215 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:43,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash 957398487, now seen corresponding path program 3 times [2024-06-27 20:33:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388792959] [2024-06-27 20:33:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:43,840 INFO 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 20:33:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388792959] [2024-06-27 20:33:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388792959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:43,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898381355] [2024-06-27 20:33:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:43,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:43,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 203 transitions, 1881 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:43,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:43,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:43,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:44,427 INFO L124 PetriNetUnfolderBase]: 2494/3977 cut-off events. [2024-06-27 20:33:44,427 INFO L125 PetriNetUnfolderBase]: For 210400/210408 co-relation queries the response was YES. [2024-06-27 20:33:44,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27085 conditions, 3977 events. 2494/3977 cut-off events. For 210400/210408 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 22129 event pairs, 715 based on Foata normal form. 5/3978 useless extension candidates. Maximal degree in co-relation 27010. Up to 3771 conditions per place. [2024-06-27 20:33:44,459 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-27 20:33:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 213 transitions, 2325 flow [2024-06-27 20:33:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:33:44,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:33:44,460 INFO L175 Difference]: Start difference. First operand has 160 places, 203 transitions, 1881 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:33:44,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 213 transitions, 2325 flow [2024-06-27 20:33:44,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 213 transitions, 2227 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:44,721 INFO L231 Difference]: Finished difference. Result has 164 places, 203 transitions, 1841 flow [2024-06-27 20:33:44,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1841, PETRI_PLACES=164, PETRI_TRANSITIONS=203} [2024-06-27 20:33:44,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:33:44,722 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 203 transitions, 1841 flow [2024-06-27 20:33:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:44,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:44,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:44,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:33:44,723 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:44,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1396573095, now seen corresponding path program 3 times [2024-06-27 20:33:44,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:44,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329942527] [2024-06-27 20:33:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:44,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:45,358 INFO 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 20:33:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329942527] [2024-06-27 20:33:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329942527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:45,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:45,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065013638] [2024-06-27 20:33:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:45,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:45,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 203 transitions, 1841 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:45,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:45,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:45,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:45,996 INFO L124 PetriNetUnfolderBase]: 2404/3885 cut-off events. [2024-06-27 20:33:45,996 INFO L125 PetriNetUnfolderBase]: For 217048/217056 co-relation queries the response was YES. [2024-06-27 20:33:46,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26724 conditions, 3885 events. 2404/3885 cut-off events. For 217048/217056 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21873 event pairs, 687 based on Foata normal form. 3/3884 useless extension candidates. Maximal degree in co-relation 26647. Up to 3556 conditions per place. [2024-06-27 20:33:46,025 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 175 selfloop transitions, 31 changer transitions 0/219 dead transitions. [2024-06-27 20:33:46,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 219 transitions, 2443 flow [2024-06-27 20:33:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:33:46,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:33:46,027 INFO L175 Difference]: Start difference. First operand has 164 places, 203 transitions, 1841 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:33:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 219 transitions, 2443 flow [2024-06-27 20:33:46,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 219 transitions, 2371 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:46,231 INFO L231 Difference]: Finished difference. Result has 165 places, 206 transitions, 1899 flow [2024-06-27 20:33:46,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1899, PETRI_PLACES=165, PETRI_TRANSITIONS=206} [2024-06-27 20:33:46,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 20:33:46,232 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 206 transitions, 1899 flow [2024-06-27 20:33:46,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 20:33:46,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:46,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:46,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:33:46,233 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:46,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2063105097, now seen corresponding path program 1 times [2024-06-27 20:33:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289568861] [2024-06-27 20:33:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:46,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289568861] [2024-06-27 20:33:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289568861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:46,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:46,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733412185] [2024-06-27 20:33:46,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:46,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:46,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 206 transitions, 1899 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:46,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:46,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:46,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:47,595 INFO L124 PetriNetUnfolderBase]: 2702/4218 cut-off events. [2024-06-27 20:33:47,595 INFO L125 PetriNetUnfolderBase]: For 266624/266636 co-relation queries the response was YES. [2024-06-27 20:33:47,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30515 conditions, 4218 events. 2702/4218 cut-off events. For 266624/266636 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22984 event pairs, 737 based on Foata normal form. 12/4226 useless extension candidates. Maximal degree in co-relation 30437. Up to 3949 conditions per place. [2024-06-27 20:33:47,632 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 39 changer transitions 0/234 dead transitions. [2024-06-27 20:33:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 234 transitions, 2511 flow [2024-06-27 20:33:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:33:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:33:47,634 INFO L175 Difference]: Start difference. First operand has 165 places, 206 transitions, 1899 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:33:47,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 234 transitions, 2511 flow [2024-06-27 20:33:47,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 234 transitions, 2403 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:47,898 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 1956 flow [2024-06-27 20:33:47,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1956, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2024-06-27 20:33:47,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-27 20:33:47,898 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 1956 flow [2024-06-27 20:33:47,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:47,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:47,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:47,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:33:47,899 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:47,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash 311171740, now seen corresponding path program 1 times [2024-06-27 20:33:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:47,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494201224] [2024-06-27 20:33:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:47,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:48,512 INFO 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 20:33:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494201224] [2024-06-27 20:33:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494201224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:48,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:48,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696987013] [2024-06-27 20:33:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:48,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:48,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:48,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 1956 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:48,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:48,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:48,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:49,278 INFO L124 PetriNetUnfolderBase]: 2640/4153 cut-off events. [2024-06-27 20:33:49,279 INFO L125 PetriNetUnfolderBase]: For 279278/279286 co-relation queries the response was YES. [2024-06-27 20:33:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30993 conditions, 4153 events. 2640/4153 cut-off events. For 279278/279286 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22901 event pairs, 710 based on Foata normal form. 6/4155 useless extension candidates. Maximal degree in co-relation 30914. Up to 3794 conditions per place. [2024-06-27 20:33:49,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 186 selfloop transitions, 35 changer transitions 0/234 dead transitions. [2024-06-27 20:33:49,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 234 transitions, 2519 flow [2024-06-27 20:33:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:33:49,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:33:49,317 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 1956 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:33:49,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 234 transitions, 2519 flow [2024-06-27 20:33:49,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 234 transitions, 2382 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:49,606 INFO L231 Difference]: Finished difference. Result has 169 places, 214 transitions, 1961 flow [2024-06-27 20:33:49,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=169, PETRI_TRANSITIONS=214} [2024-06-27 20:33:49,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 20:33:49,607 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 214 transitions, 1961 flow [2024-06-27 20:33:49,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:49,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:49,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:49,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:33:49,607 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:49,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2053847040, now seen corresponding path program 2 times [2024-06-27 20:33:49,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:49,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73480928] [2024-06-27 20:33:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:49,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:50,203 INFO 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 20:33:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:50,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73480928] [2024-06-27 20:33:50,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73480928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:50,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:50,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871432857] [2024-06-27 20:33:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:50,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:50,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:50,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 214 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:50,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:50,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:50,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:50,857 INFO L124 PetriNetUnfolderBase]: 2642/4157 cut-off events. [2024-06-27 20:33:50,857 INFO L125 PetriNetUnfolderBase]: For 288222/288230 co-relation queries the response was YES. [2024-06-27 20:33:50,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31110 conditions, 4157 events. 2642/4157 cut-off events. For 288222/288230 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22929 event pairs, 711 based on Foata normal form. 6/4159 useless extension candidates. Maximal degree in co-relation 31030. Up to 3757 conditions per place. [2024-06-27 20:33:50,891 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 44 changer transitions 0/234 dead transitions. [2024-06-27 20:33:50,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 234 transitions, 2611 flow [2024-06-27 20:33:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:33:50,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:33:50,892 INFO L175 Difference]: Start difference. First operand has 169 places, 214 transitions, 1961 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:33:50,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 234 transitions, 2611 flow [2024-06-27 20:33:51,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 234 transitions, 2514 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:51,157 INFO L231 Difference]: Finished difference. Result has 171 places, 217 transitions, 2017 flow [2024-06-27 20:33:51,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=171, PETRI_TRANSITIONS=217} [2024-06-27 20:33:51,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 20:33:51,158 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 217 transitions, 2017 flow [2024-06-27 20:33:51,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:51,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:51,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:33:51,158 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:51,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2053850667, now seen corresponding path program 2 times [2024-06-27 20:33:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:51,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074207427] [2024-06-27 20:33:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074207427] [2024-06-27 20:33:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074207427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:51,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:51,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636532291] [2024-06-27 20:33:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:51,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:51,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 217 transitions, 2017 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:51,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:51,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:51,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:52,429 INFO L124 PetriNetUnfolderBase]: 2758/4296 cut-off events. [2024-06-27 20:33:52,429 INFO L125 PetriNetUnfolderBase]: For 303297/303305 co-relation queries the response was YES. [2024-06-27 20:33:52,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32338 conditions, 4296 events. 2758/4296 cut-off events. For 303297/303305 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23430 event pairs, 745 based on Foata normal form. 6/4298 useless extension candidates. Maximal degree in co-relation 32257. Up to 3940 conditions per place. [2024-06-27 20:33:52,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 57 changer transitions 0/248 dead transitions. [2024-06-27 20:33:52,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 248 transitions, 3001 flow [2024-06-27 20:33:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:33:52,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:33:52,470 INFO L175 Difference]: Start difference. First operand has 171 places, 217 transitions, 2017 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:33:52,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 248 transitions, 3001 flow [2024-06-27 20:33:52,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 248 transitions, 2903 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:52,726 INFO L231 Difference]: Finished difference. Result has 176 places, 229 transitions, 2314 flow [2024-06-27 20:33:52,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=176, PETRI_TRANSITIONS=229} [2024-06-27 20:33:52,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 20:33:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 229 transitions, 2314 flow [2024-06-27 20:33:52,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:52,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:52,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:52,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:33:52,728 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:52,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2053839104, now seen corresponding path program 1 times [2024-06-27 20:33:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214032601] [2024-06-27 20:33:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:52,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:53,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214032601] [2024-06-27 20:33:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214032601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:53,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:53,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:53,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224966431] [2024-06-27 20:33:53,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:53,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:53,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:53,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:53,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 229 transitions, 2314 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:53,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:53,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:53,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:54,150 INFO L124 PetriNetUnfolderBase]: 2763/4308 cut-off events. [2024-06-27 20:33:54,150 INFO L125 PetriNetUnfolderBase]: For 317171/317175 co-relation queries the response was YES. [2024-06-27 20:33:54,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33283 conditions, 4308 events. 2763/4308 cut-off events. For 317171/317175 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23528 event pairs, 760 based on Foata normal form. 5/4310 useless extension candidates. Maximal degree in co-relation 33200. Up to 4154 conditions per place. [2024-06-27 20:33:54,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 19 changer transitions 0/250 dead transitions. [2024-06-27 20:33:54,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 250 transitions, 2926 flow [2024-06-27 20:33:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:33:54,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 20:33:54,192 INFO L175 Difference]: Start difference. First operand has 176 places, 229 transitions, 2314 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:33:54,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 250 transitions, 2926 flow [2024-06-27 20:33:54,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 250 transitions, 2790 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:54,499 INFO L231 Difference]: Finished difference. Result has 181 places, 232 transitions, 2290 flow [2024-06-27 20:33:54,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2290, PETRI_PLACES=181, PETRI_TRANSITIONS=232} [2024-06-27 20:33:54,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:33:54,500 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 232 transitions, 2290 flow [2024-06-27 20:33:54,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:54,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:54,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:54,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:33:54,501 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:54,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:54,501 INFO L85 PathProgramCache]: Analyzing trace with hash 316893193, now seen corresponding path program 3 times [2024-06-27 20:33:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:54,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348324452] [2024-06-27 20:33:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:55,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348324452] [2024-06-27 20:33:55,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348324452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:55,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:55,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262751004] [2024-06-27 20:33:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:55,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:55,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 232 transitions, 2290 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:55,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:55,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:55,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:55,928 INFO L124 PetriNetUnfolderBase]: 2759/4299 cut-off events. [2024-06-27 20:33:55,928 INFO L125 PetriNetUnfolderBase]: For 321102/321110 co-relation queries the response was YES. [2024-06-27 20:33:55,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33382 conditions, 4299 events. 2759/4299 cut-off events. For 321102/321110 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23407 event pairs, 744 based on Foata normal form. 6/4301 useless extension candidates. Maximal degree in co-relation 33297. Up to 3945 conditions per place. [2024-06-27 20:33:55,969 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 56 changer transitions 0/251 dead transitions. [2024-06-27 20:33:55,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 251 transitions, 3056 flow [2024-06-27 20:33:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:33:55,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:33:55,970 INFO L175 Difference]: Start difference. First operand has 181 places, 232 transitions, 2290 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:33:55,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 251 transitions, 3056 flow [2024-06-27 20:33:56,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 251 transitions, 2918 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:56,293 INFO L231 Difference]: Finished difference. Result has 183 places, 232 transitions, 2272 flow [2024-06-27 20:33:56,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2272, PETRI_PLACES=183, PETRI_TRANSITIONS=232} [2024-06-27 20:33:56,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:33:56,294 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 232 transitions, 2272 flow [2024-06-27 20:33:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:56,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:56,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:33:56,294 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:56,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1032576128, now seen corresponding path program 3 times [2024-06-27 20:33:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:56,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058775163] [2024-06-27 20:33:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:56,780 INFO 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 20:33:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058775163] [2024-06-27 20:33:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058775163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388129322] [2024-06-27 20:33:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:56,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:56,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 232 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:56,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:56,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:56,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:57,513 INFO L124 PetriNetUnfolderBase]: 2679/4211 cut-off events. [2024-06-27 20:33:57,513 INFO L125 PetriNetUnfolderBase]: For 330994/330999 co-relation queries the response was YES. [2024-06-27 20:33:57,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33203 conditions, 4211 events. 2679/4211 cut-off events. For 330994/330999 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23218 event pairs, 714 based on Foata normal form. 1/4198 useless extension candidates. Maximal degree in co-relation 33117. Up to 3843 conditions per place. [2024-06-27 20:33:57,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 35 changer transitions 0/250 dead transitions. [2024-06-27 20:33:57,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 2802 flow [2024-06-27 20:33:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:33:57,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:33:57,553 INFO L175 Difference]: Start difference. First operand has 183 places, 232 transitions, 2272 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:33:57,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 2802 flow [2024-06-27 20:33:57,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 250 transitions, 2639 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:57,910 INFO L231 Difference]: Finished difference. Result has 183 places, 232 transitions, 2186 flow [2024-06-27 20:33:57,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2186, PETRI_PLACES=183, PETRI_TRANSITIONS=232} [2024-06-27 20:33:57,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:33:57,911 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 232 transitions, 2186 flow [2024-06-27 20:33:57,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:57,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:57,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:33:57,911 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:57,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash -852023296, now seen corresponding path program 4 times [2024-06-27 20:33:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:57,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231774532] [2024-06-27 20:33:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:58,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:58,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231774532] [2024-06-27 20:33:58,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231774532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:58,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:58,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:58,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786099869] [2024-06-27 20:33:58,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:58,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:58,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:58,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:58,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 232 transitions, 2186 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:59,094 INFO L124 PetriNetUnfolderBase]: 2684/4216 cut-off events. [2024-06-27 20:33:59,094 INFO L125 PetriNetUnfolderBase]: For 341696/341701 co-relation queries the response was YES. [2024-06-27 20:33:59,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33336 conditions, 4216 events. 2684/4216 cut-off events. For 341696/341701 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23210 event pairs, 710 based on Foata normal form. 1/4203 useless extension candidates. Maximal degree in co-relation 33250. Up to 3830 conditions per place. [2024-06-27 20:33:59,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 44 changer transitions 0/250 dead transitions. [2024-06-27 20:33:59,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 2756 flow [2024-06-27 20:33:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:33:59,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:33:59,145 INFO L175 Difference]: Start difference. First operand has 183 places, 232 transitions, 2186 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:33:59,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 2756 flow [2024-06-27 20:33:59,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 250 transitions, 2624 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:59,585 INFO L231 Difference]: Finished difference. Result has 183 places, 235 transitions, 2206 flow [2024-06-27 20:33:59,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2206, PETRI_PLACES=183, PETRI_TRANSITIONS=235} [2024-06-27 20:33:59,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:33:59,586 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 235 transitions, 2206 flow [2024-06-27 20:33:59,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:59,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:59,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:33:59,587 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:59,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -627538202, now seen corresponding path program 5 times [2024-06-27 20:33:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:59,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966762931] [2024-06-27 20:33:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:00,165 INFO 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 20:34:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966762931] [2024-06-27 20:34:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966762931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:00,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:00,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:00,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342989918] [2024-06-27 20:34:00,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:00,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:00,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:00,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 235 transitions, 2206 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:00,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:00,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:00,906 INFO L124 PetriNetUnfolderBase]: 2686/4225 cut-off events. [2024-06-27 20:34:00,906 INFO L125 PetriNetUnfolderBase]: For 353256/353267 co-relation queries the response was YES. [2024-06-27 20:34:00,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33497 conditions, 4225 events. 2686/4225 cut-off events. For 353256/353267 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23313 event pairs, 732 based on Foata normal form. 6/4216 useless extension candidates. Maximal degree in co-relation 33410. Up to 3770 conditions per place. [2024-06-27 20:34:00,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 174 selfloop transitions, 60 changer transitions 0/250 dead transitions. [2024-06-27 20:34:00,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 2882 flow [2024-06-27 20:34:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:34:00,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:34:00,951 INFO L175 Difference]: Start difference. First operand has 183 places, 235 transitions, 2206 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:34:00,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 2882 flow [2024-06-27 20:34:01,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 250 transitions, 2762 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:01,337 INFO L231 Difference]: Finished difference. Result has 185 places, 238 transitions, 2274 flow [2024-06-27 20:34:01,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2274, PETRI_PLACES=185, PETRI_TRANSITIONS=238} [2024-06-27 20:34:01,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 20:34:01,337 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 238 transitions, 2274 flow [2024-06-27 20:34:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:01,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:01,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:34:01,338 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:01,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash 344086528, now seen corresponding path program 6 times [2024-06-27 20:34:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580562338] [2024-06-27 20:34:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:01,961 INFO 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 20:34:01,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:01,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580562338] [2024-06-27 20:34:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580562338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903563885] [2024-06-27 20:34:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:02,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:02,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 238 transitions, 2274 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:02,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:02,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:02,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:02,631 INFO L124 PetriNetUnfolderBase]: 2681/4217 cut-off events. [2024-06-27 20:34:02,631 INFO L125 PetriNetUnfolderBase]: For 361292/361303 co-relation queries the response was YES. [2024-06-27 20:34:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33595 conditions, 4217 events. 2681/4217 cut-off events. For 361292/361303 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23253 event pairs, 733 based on Foata normal form. 5/4207 useless extension candidates. Maximal degree in co-relation 33507. Up to 3765 conditions per place. [2024-06-27 20:34:02,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2024-06-27 20:34:02,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 249 transitions, 2774 flow [2024-06-27 20:34:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:34:02,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:34:02,684 INFO L175 Difference]: Start difference. First operand has 185 places, 238 transitions, 2274 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:34:02,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 249 transitions, 2774 flow [2024-06-27 20:34:03,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 249 transitions, 2600 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:03,034 INFO L231 Difference]: Finished difference. Result has 188 places, 238 transitions, 2234 flow [2024-06-27 20:34:03,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2234, PETRI_PLACES=188, PETRI_TRANSITIONS=238} [2024-06-27 20:34:03,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-27 20:34:03,036 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 238 transitions, 2234 flow [2024-06-27 20:34:03,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:03,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:03,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:34:03,037 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:03,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash 338368981, now seen corresponding path program 4 times [2024-06-27 20:34:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:03,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021114521] [2024-06-27 20:34:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:03,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:03,782 INFO 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 20:34:03,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:03,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021114521] [2024-06-27 20:34:03,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021114521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:03,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:03,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:03,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072892612] [2024-06-27 20:34:03,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:03,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:03,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:03,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:03,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:03,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:03,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 238 transitions, 2234 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:03,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:03,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:04,487 INFO L124 PetriNetUnfolderBase]: 2772/4317 cut-off events. [2024-06-27 20:34:04,488 INFO L125 PetriNetUnfolderBase]: For 373724/373735 co-relation queries the response was YES. [2024-06-27 20:34:04,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34335 conditions, 4317 events. 2772/4317 cut-off events. For 373724/373735 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23499 event pairs, 764 based on Foata normal form. 6/4308 useless extension candidates. Maximal degree in co-relation 34246. Up to 3871 conditions per place. [2024-06-27 20:34:04,535 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 89 changer transitions 0/265 dead transitions. [2024-06-27 20:34:04,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 265 transitions, 3412 flow [2024-06-27 20:34:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:34:04,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:34:04,537 INFO L175 Difference]: Start difference. First operand has 188 places, 238 transitions, 2234 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:34:04,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 265 transitions, 3412 flow [2024-06-27 20:34:04,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 265 transitions, 3244 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:04,885 INFO L231 Difference]: Finished difference. Result has 190 places, 250 transitions, 2547 flow [2024-06-27 20:34:04,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=190, PETRI_TRANSITIONS=250} [2024-06-27 20:34:04,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 20:34:04,886 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 250 transitions, 2547 flow [2024-06-27 20:34:04,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:04,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:04,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:04,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:34:04,886 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:04,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 351267554, now seen corresponding path program 2 times [2024-06-27 20:34:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:04,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120795648] [2024-06-27 20:34:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:05,574 INFO 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 20:34:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120795648] [2024-06-27 20:34:05,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120795648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:05,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:05,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053202142] [2024-06-27 20:34:05,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:05,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:05,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:05,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 250 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:05,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:05,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:05,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:06,290 INFO L124 PetriNetUnfolderBase]: 2785/4345 cut-off events. [2024-06-27 20:34:06,291 INFO L125 PetriNetUnfolderBase]: For 390723/390735 co-relation queries the response was YES. [2024-06-27 20:34:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35458 conditions, 4345 events. 2785/4345 cut-off events. For 390723/390735 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23633 event pairs, 749 based on Foata normal form. 9/4347 useless extension candidates. Maximal degree in co-relation 35367. Up to 4156 conditions per place. [2024-06-27 20:34:06,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 40 changer transitions 0/276 dead transitions. [2024-06-27 20:34:06,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 3595 flow [2024-06-27 20:34:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:34:06,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 20:34:06,333 INFO L175 Difference]: Start difference. First operand has 190 places, 250 transitions, 2547 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:34:06,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 3595 flow [2024-06-27 20:34:06,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 276 transitions, 3337 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:06,674 INFO L231 Difference]: Finished difference. Result has 195 places, 261 transitions, 2620 flow [2024-06-27 20:34:06,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2620, PETRI_PLACES=195, PETRI_TRANSITIONS=261} [2024-06-27 20:34:06,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:34:06,674 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 261 transitions, 2620 flow [2024-06-27 20:34:06,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:06,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:06,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:34:06,675 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:06,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash 351713024, now seen corresponding path program 3 times [2024-06-27 20:34:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:06,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869738594] [2024-06-27 20:34:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:07,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:07,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869738594] [2024-06-27 20:34:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869738594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:07,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857022710] [2024-06-27 20:34:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:07,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:07,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 261 transitions, 2620 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:07,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:08,110 INFO L124 PetriNetUnfolderBase]: 2782/4341 cut-off events. [2024-06-27 20:34:08,110 INFO L125 PetriNetUnfolderBase]: For 396864/396876 co-relation queries the response was YES. [2024-06-27 20:34:08,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35022 conditions, 4341 events. 2782/4341 cut-off events. For 396864/396876 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23626 event pairs, 749 based on Foata normal form. 9/4343 useless extension candidates. Maximal degree in co-relation 34929. Up to 4153 conditions per place. [2024-06-27 20:34:08,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 42 changer transitions 0/275 dead transitions. [2024-06-27 20:34:08,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 275 transitions, 3328 flow [2024-06-27 20:34:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:34:08,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 20:34:08,150 INFO L175 Difference]: Start difference. First operand has 195 places, 261 transitions, 2620 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:34:08,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 275 transitions, 3328 flow [2024-06-27 20:34:08,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 275 transitions, 3193 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:08,475 INFO L231 Difference]: Finished difference. Result has 200 places, 261 transitions, 2575 flow [2024-06-27 20:34:08,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2575, PETRI_PLACES=200, PETRI_TRANSITIONS=261} [2024-06-27 20:34:08,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 20:34:08,476 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 261 transitions, 2575 flow [2024-06-27 20:34:08,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:08,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:08,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:08,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:34:08,477 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:08,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash -627530266, now seen corresponding path program 4 times [2024-06-27 20:34:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755137755] [2024-06-27 20:34:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:09,106 INFO 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 20:34:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755137755] [2024-06-27 20:34:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755137755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:09,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:09,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:09,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231516039] [2024-06-27 20:34:09,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:09,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:09,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:09,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:09,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 261 transitions, 2575 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:09,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:09,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:09,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:09,802 INFO L124 PetriNetUnfolderBase]: 2779/4337 cut-off events. [2024-06-27 20:34:09,802 INFO L125 PetriNetUnfolderBase]: For 407143/407155 co-relation queries the response was YES. [2024-06-27 20:34:09,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35108 conditions, 4337 events. 2779/4337 cut-off events. For 407143/407155 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23596 event pairs, 748 based on Foata normal form. 9/4339 useless extension candidates. Maximal degree in co-relation 35013. Up to 4150 conditions per place. [2024-06-27 20:34:09,846 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 40 changer transitions 0/275 dead transitions. [2024-06-27 20:34:09,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 275 transitions, 3168 flow [2024-06-27 20:34:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:34:09,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 20:34:09,848 INFO L175 Difference]: Start difference. First operand has 200 places, 261 transitions, 2575 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:34:09,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 275 transitions, 3168 flow [2024-06-27 20:34:10,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 275 transitions, 3036 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:10,305 INFO L231 Difference]: Finished difference. Result has 202 places, 262 transitions, 2538 flow [2024-06-27 20:34:10,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=202, PETRI_TRANSITIONS=262} [2024-06-27 20:34:10,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:34:10,306 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 262 transitions, 2538 flow [2024-06-27 20:34:10,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:10,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:10,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:34:10,307 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:10,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash -627530669, now seen corresponding path program 5 times [2024-06-27 20:34:10,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:10,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817987] [2024-06-27 20:34:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:11,046 INFO 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 20:34:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817987] [2024-06-27 20:34:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:11,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:11,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147815251] [2024-06-27 20:34:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:11,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:11,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:11,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 262 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:11,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:11,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:11,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:11,782 INFO L124 PetriNetUnfolderBase]: 2807/4371 cut-off events. [2024-06-27 20:34:11,783 INFO L125 PetriNetUnfolderBase]: For 423706/423717 co-relation queries the response was YES. [2024-06-27 20:34:11,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35704 conditions, 4371 events. 2807/4371 cut-off events. For 423706/423717 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23793 event pairs, 766 based on Foata normal form. 6/4362 useless extension candidates. Maximal degree in co-relation 35608. Up to 3909 conditions per place. [2024-06-27 20:34:11,830 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 92 changer transitions 0/285 dead transitions. [2024-06-27 20:34:11,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 285 transitions, 3665 flow [2024-06-27 20:34:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:11,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:34:11,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:34:11,832 INFO L175 Difference]: Start difference. First operand has 202 places, 262 transitions, 2538 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:34:11,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 285 transitions, 3665 flow [2024-06-27 20:34:12,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 285 transitions, 3598 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:12,306 INFO L231 Difference]: Finished difference. Result has 206 places, 270 transitions, 2827 flow [2024-06-27 20:34:12,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2827, PETRI_PLACES=206, PETRI_TRANSITIONS=270} [2024-06-27 20:34:12,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 20:34:12,307 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 270 transitions, 2827 flow [2024-06-27 20:34:12,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:12,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:12,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:12,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:34:12,307 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:12,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash -614643659, now seen corresponding path program 6 times [2024-06-27 20:34:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021446922] [2024-06-27 20:34:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:12,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:13,017 INFO 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 20:34:13,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021446922] [2024-06-27 20:34:13,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021446922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:13,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:13,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:13,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969596201] [2024-06-27 20:34:13,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:13,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:13,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:13,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 270 transitions, 2827 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:13,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:13,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:13,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:13,786 INFO L124 PetriNetUnfolderBase]: 2803/4367 cut-off events. [2024-06-27 20:34:13,786 INFO L125 PetriNetUnfolderBase]: For 434313/434324 co-relation queries the response was YES. [2024-06-27 20:34:13,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36034 conditions, 4367 events. 2803/4367 cut-off events. For 434313/434324 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23791 event pairs, 764 based on Foata normal form. 6/4358 useless extension candidates. Maximal degree in co-relation 35936. Up to 3907 conditions per place. [2024-06-27 20:34:13,831 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 98 changer transitions 0/284 dead transitions. [2024-06-27 20:34:13,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 284 transitions, 3683 flow [2024-06-27 20:34:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:34:13,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:34:13,833 INFO L175 Difference]: Start difference. First operand has 206 places, 270 transitions, 2827 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:34:13,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 284 transitions, 3683 flow [2024-06-27 20:34:14,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 284 transitions, 3429 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:14,300 INFO L231 Difference]: Finished difference. Result has 210 places, 270 transitions, 2777 flow [2024-06-27 20:34:14,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=210, PETRI_TRANSITIONS=270} [2024-06-27 20:34:14,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 20:34:14,301 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 270 transitions, 2777 flow [2024-06-27 20:34:14,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:14,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:14,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:14,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:34:14,301 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:14,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:14,302 INFO L85 PathProgramCache]: Analyzing trace with hash -217824952, now seen corresponding path program 1 times [2024-06-27 20:34:14,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:14,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783278406] [2024-06-27 20:34:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:14,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:15,203 INFO 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 20:34:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783278406] [2024-06-27 20:34:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783278406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:15,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:15,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979969157] [2024-06-27 20:34:15,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:15,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:15,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 270 transitions, 2777 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:16,170 INFO L124 PetriNetUnfolderBase]: 2622/4188 cut-off events. [2024-06-27 20:34:16,170 INFO L125 PetriNetUnfolderBase]: For 445500/445502 co-relation queries the response was YES. [2024-06-27 20:34:16,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35025 conditions, 4188 events. 2622/4188 cut-off events. For 445500/445502 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23546 event pairs, 717 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 34926. Up to 3799 conditions per place. [2024-06-27 20:34:16,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 21 changer transitions 0/288 dead transitions. [2024-06-27 20:34:16,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 288 transitions, 3361 flow [2024-06-27 20:34:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:34:16,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:34:16,212 INFO L175 Difference]: Start difference. First operand has 210 places, 270 transitions, 2777 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:34:16,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 288 transitions, 3361 flow [2024-06-27 20:34:16,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 3062 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 20:34:16,744 INFO L231 Difference]: Finished difference. Result has 210 places, 272 transitions, 2549 flow [2024-06-27 20:34:16,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2549, PETRI_PLACES=210, PETRI_TRANSITIONS=272} [2024-06-27 20:34:16,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 20:34:16,745 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 272 transitions, 2549 flow [2024-06-27 20:34:16,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:16,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:16,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:34:16,746 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:16,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -855734275, now seen corresponding path program 1 times [2024-06-27 20:34:16,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106909962] [2024-06-27 20:34:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:17,318 INFO 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 20:34:17,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:17,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106909962] [2024-06-27 20:34:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106909962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:17,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:17,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546761349] [2024-06-27 20:34:17,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:17,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:17,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:17,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:17,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 272 transitions, 2549 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:17,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:17,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:17,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:18,120 INFO L124 PetriNetUnfolderBase]: 2706/4276 cut-off events. [2024-06-27 20:34:18,121 INFO L125 PetriNetUnfolderBase]: For 458097/458099 co-relation queries the response was YES. [2024-06-27 20:34:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35282 conditions, 4276 events. 2706/4276 cut-off events. For 458097/458099 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23701 event pairs, 750 based on Foata normal form. 2/4275 useless extension candidates. Maximal degree in co-relation 35183. Up to 4013 conditions per place. [2024-06-27 20:34:18,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 21 changer transitions 0/293 dead transitions. [2024-06-27 20:34:18,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 293 transitions, 3225 flow [2024-06-27 20:34:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:34:18,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:34:18,169 INFO L175 Difference]: Start difference. First operand has 210 places, 272 transitions, 2549 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:34:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 293 transitions, 3225 flow [2024-06-27 20:34:18,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 293 transitions, 3173 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:18,597 INFO L231 Difference]: Finished difference. Result has 212 places, 275 transitions, 2607 flow [2024-06-27 20:34:18,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2607, PETRI_PLACES=212, PETRI_TRANSITIONS=275} [2024-06-27 20:34:18,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 20:34:18,597 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 275 transitions, 2607 flow [2024-06-27 20:34:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:18,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:18,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:18,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:34:18,598 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:18,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:18,598 INFO L85 PathProgramCache]: Analyzing trace with hash -529307057, now seen corresponding path program 2 times [2024-06-27 20:34:18,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:18,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001822547] [2024-06-27 20:34:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:18,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:19,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001822547] [2024-06-27 20:34:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001822547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:19,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482520598] [2024-06-27 20:34:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:19,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:19,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 275 transitions, 2607 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:19,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:19,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:19,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:20,291 INFO L124 PetriNetUnfolderBase]: 2732/4311 cut-off events. [2024-06-27 20:34:20,292 INFO L125 PetriNetUnfolderBase]: For 477280/477282 co-relation queries the response was YES. [2024-06-27 20:34:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36278 conditions, 4311 events. 2732/4311 cut-off events. For 477280/477282 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23874 event pairs, 771 based on Foata normal form. 2/4310 useless extension candidates. Maximal degree in co-relation 36178. Up to 4015 conditions per place. [2024-06-27 20:34:20,338 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 36 changer transitions 0/298 dead transitions. [2024-06-27 20:34:20,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 298 transitions, 3491 flow [2024-06-27 20:34:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:34:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:34:20,339 INFO L175 Difference]: Start difference. First operand has 212 places, 275 transitions, 2607 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:34:20,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 298 transitions, 3491 flow [2024-06-27 20:34:20,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 298 transitions, 3403 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:20,809 INFO L231 Difference]: Finished difference. Result has 214 places, 281 transitions, 2727 flow [2024-06-27 20:34:20,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2727, PETRI_PLACES=214, PETRI_TRANSITIONS=281} [2024-06-27 20:34:20,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 20:34:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 281 transitions, 2727 flow [2024-06-27 20:34:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:20,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:20,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:20,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:34:20,810 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:20,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -529306840, now seen corresponding path program 1 times [2024-06-27 20:34:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125476774] [2024-06-27 20:34:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:20,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:21,488 INFO 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 20:34:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125476774] [2024-06-27 20:34:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125476774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:21,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:21,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:21,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597555864] [2024-06-27 20:34:21,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:21,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:21,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:21,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:21,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:21,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 281 transitions, 2727 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:21,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:21,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:21,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:22,249 INFO L124 PetriNetUnfolderBase]: 2737/4321 cut-off events. [2024-06-27 20:34:22,250 INFO L125 PetriNetUnfolderBase]: For 493296/493298 co-relation queries the response was YES. [2024-06-27 20:34:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36846 conditions, 4321 events. 2737/4321 cut-off events. For 493296/493298 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23948 event pairs, 752 based on Foata normal form. 2/4320 useless extension candidates. Maximal degree in co-relation 36745. Up to 4079 conditions per place. [2024-06-27 20:34:22,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 18 changer transitions 0/297 dead transitions. [2024-06-27 20:34:22,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 297 transitions, 3397 flow [2024-06-27 20:34:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:34:22,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:34:22,294 INFO L175 Difference]: Start difference. First operand has 214 places, 281 transitions, 2727 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:34:22,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 297 transitions, 3397 flow [2024-06-27 20:34:22,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 297 transitions, 3304 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:22,822 INFO L231 Difference]: Finished difference. Result has 218 places, 284 transitions, 2742 flow [2024-06-27 20:34:22,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2742, PETRI_PLACES=218, PETRI_TRANSITIONS=284} [2024-06-27 20:34:22,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:34:22,823 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 284 transitions, 2742 flow [2024-06-27 20:34:22,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:22,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:22,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:22,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:34:22,824 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:22,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -529312637, now seen corresponding path program 3 times [2024-06-27 20:34:22,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:22,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119611203] [2024-06-27 20:34:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:22,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:23,415 INFO 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 20:34:23,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:23,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119611203] [2024-06-27 20:34:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119611203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:23,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070877224] [2024-06-27 20:34:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:23,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:23,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:23,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:23,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 284 transitions, 2742 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:23,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:23,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:23,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:24,230 INFO L124 PetriNetUnfolderBase]: 2739/4324 cut-off events. [2024-06-27 20:34:24,230 INFO L125 PetriNetUnfolderBase]: For 503469/503471 co-relation queries the response was YES. [2024-06-27 20:34:24,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37195 conditions, 4324 events. 2739/4324 cut-off events. For 503469/503471 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24024 event pairs, 751 based on Foata normal form. 2/4323 useless extension candidates. Maximal degree in co-relation 37092. Up to 4026 conditions per place. [2024-06-27 20:34:24,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 37 changer transitions 0/304 dead transitions. [2024-06-27 20:34:24,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 304 transitions, 3578 flow [2024-06-27 20:34:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:34:24,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:34:24,279 INFO L175 Difference]: Start difference. First operand has 218 places, 284 transitions, 2742 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:34:24,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 304 transitions, 3578 flow [2024-06-27 20:34:24,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 304 transitions, 3492 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:24,830 INFO L231 Difference]: Finished difference. Result has 220 places, 287 transitions, 2796 flow [2024-06-27 20:34:24,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2796, PETRI_PLACES=220, PETRI_TRANSITIONS=287} [2024-06-27 20:34:24,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 20:34:24,831 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 287 transitions, 2796 flow [2024-06-27 20:34:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:24,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:24,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:34:24,831 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:24,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -621810611, now seen corresponding path program 4 times [2024-06-27 20:34:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199928133] [2024-06-27 20:34:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:25,463 INFO 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 20:34:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199928133] [2024-06-27 20:34:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199928133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:25,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:25,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:25,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72538317] [2024-06-27 20:34:25,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:25,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:25,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 287 transitions, 2796 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:25,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:26,242 INFO L124 PetriNetUnfolderBase]: 2738/4334 cut-off events. [2024-06-27 20:34:26,242 INFO L125 PetriNetUnfolderBase]: For 526938/526946 co-relation queries the response was YES. [2024-06-27 20:34:26,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37756 conditions, 4334 events. 2738/4334 cut-off events. For 526938/526946 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24280 event pairs, 748 based on Foata normal form. 3/4333 useless extension candidates. Maximal degree in co-relation 37652. Up to 3988 conditions per place. [2024-06-27 20:34:26,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 57 changer transitions 0/313 dead transitions. [2024-06-27 20:34:26,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 313 transitions, 4080 flow [2024-06-27 20:34:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:34:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:34:26,296 INFO L175 Difference]: Start difference. First operand has 220 places, 287 transitions, 2796 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:34:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 313 transitions, 4080 flow [2024-06-27 20:34:26,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 313 transitions, 3980 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:26,889 INFO L231 Difference]: Finished difference. Result has 223 places, 296 transitions, 3032 flow [2024-06-27 20:34:26,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3032, PETRI_PLACES=223, PETRI_TRANSITIONS=296} [2024-06-27 20:34:26,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 20:34:26,889 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 296 transitions, 3032 flow [2024-06-27 20:34:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:26,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:34:26,890 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:26,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash -621810394, now seen corresponding path program 2 times [2024-06-27 20:34:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901037697] [2024-06-27 20:34:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:27,540 INFO 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 20:34:27,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:27,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901037697] [2024-06-27 20:34:27,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901037697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:27,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511060738] [2024-06-27 20:34:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:27,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:27,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:27,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 296 transitions, 3032 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:27,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:27,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:28,369 INFO L124 PetriNetUnfolderBase]: 2743/4343 cut-off events. [2024-06-27 20:34:28,369 INFO L125 PetriNetUnfolderBase]: For 543713/543721 co-relation queries the response was YES. [2024-06-27 20:34:28,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 4343 events. 2743/4343 cut-off events. For 543713/543721 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24342 event pairs, 744 based on Foata normal form. 6/4345 useless extension candidates. Maximal degree in co-relation 38234. Up to 4068 conditions per place. [2024-06-27 20:34:28,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 38 changer transitions 0/313 dead transitions. [2024-06-27 20:34:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3944 flow [2024-06-27 20:34:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:34:28,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:34:28,430 INFO L175 Difference]: Start difference. First operand has 223 places, 296 transitions, 3032 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:34:28,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3944 flow [2024-06-27 20:34:29,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 313 transitions, 3770 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:29,084 INFO L231 Difference]: Finished difference. Result has 227 places, 302 transitions, 3082 flow [2024-06-27 20:34:29,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3082, PETRI_PLACES=227, PETRI_TRANSITIONS=302} [2024-06-27 20:34:29,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 20:34:29,084 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 302 transitions, 3082 flow [2024-06-27 20:34:29,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:29,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:29,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:29,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:34:29,085 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:29,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash 344094619, now seen corresponding path program 5 times [2024-06-27 20:34:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090658493] [2024-06-27 20:34:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:29,795 INFO 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 20:34:29,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:29,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090658493] [2024-06-27 20:34:29,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090658493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:29,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:29,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:29,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898744379] [2024-06-27 20:34:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:29,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:29,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:29,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 302 transitions, 3082 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:29,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:29,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:29,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:30,640 INFO L124 PetriNetUnfolderBase]: 2737/4335 cut-off events. [2024-06-27 20:34:30,641 INFO L125 PetriNetUnfolderBase]: For 550653/550661 co-relation queries the response was YES. [2024-06-27 20:34:30,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38072 conditions, 4335 events. 2737/4335 cut-off events. For 550653/550661 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24284 event pairs, 748 based on Foata normal form. 3/4334 useless extension candidates. Maximal degree in co-relation 37966. Up to 3990 conditions per place. [2024-06-27 20:34:30,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 58 changer transitions 0/317 dead transitions. [2024-06-27 20:34:30,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 317 transitions, 4026 flow [2024-06-27 20:34:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:34:30,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:34:30,691 INFO L175 Difference]: Start difference. First operand has 227 places, 302 transitions, 3082 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:34:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 317 transitions, 4026 flow [2024-06-27 20:34:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 317 transitions, 3885 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:31,326 INFO L231 Difference]: Finished difference. Result has 231 places, 302 transitions, 3063 flow [2024-06-27 20:34:31,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3063, PETRI_PLACES=231, PETRI_TRANSITIONS=302} [2024-06-27 20:34:31,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 20:34:31,326 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 302 transitions, 3063 flow [2024-06-27 20:34:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:31,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:34:31,327 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:31,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -614191834, now seen corresponding path program 3 times [2024-06-27 20:34:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:31,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239403316] [2024-06-27 20:34:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:31,960 INFO 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 20:34:31,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:31,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239403316] [2024-06-27 20:34:31,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239403316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:31,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:31,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:31,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967572216] [2024-06-27 20:34:31,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:31,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:31,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:32,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 302 transitions, 3063 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:32,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:32,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:32,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:32,751 INFO L124 PetriNetUnfolderBase]: 2742/4344 cut-off events. [2024-06-27 20:34:32,751 INFO L125 PetriNetUnfolderBase]: For 564708/564716 co-relation queries the response was YES. [2024-06-27 20:34:32,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38374 conditions, 4344 events. 2742/4344 cut-off events. For 564708/564716 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24332 event pairs, 743 based on Foata normal form. 6/4346 useless extension candidates. Maximal degree in co-relation 38266. Up to 4066 conditions per place. [2024-06-27 20:34:32,805 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 44 changer transitions 0/316 dead transitions. [2024-06-27 20:34:32,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 316 transitions, 3915 flow [2024-06-27 20:34:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:34:32,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:34:32,806 INFO L175 Difference]: Start difference. First operand has 231 places, 302 transitions, 3063 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:34:32,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 316 transitions, 3915 flow [2024-06-27 20:34:33,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 316 transitions, 3795 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:33,499 INFO L231 Difference]: Finished difference. Result has 233 places, 305 transitions, 3104 flow [2024-06-27 20:34:33,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3104, PETRI_PLACES=233, PETRI_TRANSITIONS=305} [2024-06-27 20:34:33,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 20:34:33,500 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 305 transitions, 3104 flow [2024-06-27 20:34:33,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:33,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:33,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:34:33,500 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:33,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash -614458744, now seen corresponding path program 4 times [2024-06-27 20:34:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:33,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760176406] [2024-06-27 20:34:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:34,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760176406] [2024-06-27 20:34:34,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760176406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:34,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:34,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619386707] [2024-06-27 20:34:34,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:34,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:34,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 305 transitions, 3104 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:34,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:34,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:34,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:35,050 INFO L124 PetriNetUnfolderBase]: 2736/4336 cut-off events. [2024-06-27 20:34:35,051 INFO L125 PetriNetUnfolderBase]: For 573518/573526 co-relation queries the response was YES. [2024-06-27 20:34:35,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38259 conditions, 4336 events. 2736/4336 cut-off events. For 573518/573526 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24291 event pairs, 742 based on Foata normal form. 6/4338 useless extension candidates. Maximal degree in co-relation 38150. Up to 4061 conditions per place. [2024-06-27 20:34:35,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 42 changer transitions 0/315 dead transitions. [2024-06-27 20:34:35,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 315 transitions, 3740 flow [2024-06-27 20:34:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:34:35,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:34:35,095 INFO L175 Difference]: Start difference. First operand has 233 places, 305 transitions, 3104 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:34:35,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 315 transitions, 3740 flow [2024-06-27 20:34:35,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 315 transitions, 3567 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:35,722 INFO L231 Difference]: Finished difference. Result has 236 places, 305 transitions, 3021 flow [2024-06-27 20:34:35,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3021, PETRI_PLACES=236, PETRI_TRANSITIONS=305} [2024-06-27 20:34:35,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-27 20:34:35,722 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 305 transitions, 3021 flow [2024-06-27 20:34:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:35,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:35,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:34:35,723 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:35,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash 351451849, now seen corresponding path program 6 times [2024-06-27 20:34:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:35,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113164828] [2024-06-27 20:34:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:36,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113164828] [2024-06-27 20:34:36,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113164828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:36,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:36,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523716109] [2024-06-27 20:34:36,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:36,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:36,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:36,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:36,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 305 transitions, 3021 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:36,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:36,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:37,267 INFO L124 PetriNetUnfolderBase]: 2735/4333 cut-off events. [2024-06-27 20:34:37,267 INFO L125 PetriNetUnfolderBase]: For 581921/581929 co-relation queries the response was YES. [2024-06-27 20:34:37,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38174 conditions, 4333 events. 2735/4333 cut-off events. For 581921/581929 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24298 event pairs, 742 based on Foata normal form. 3/4332 useless extension candidates. Maximal degree in co-relation 38064. Up to 3990 conditions per place. [2024-06-27 20:34:37,314 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 248 selfloop transitions, 61 changer transitions 0/319 dead transitions. [2024-06-27 20:34:37,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 319 transitions, 3829 flow [2024-06-27 20:34:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:34:37,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:34:37,316 INFO L175 Difference]: Start difference. First operand has 236 places, 305 transitions, 3021 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:34:37,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 319 transitions, 3829 flow [2024-06-27 20:34:38,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 319 transitions, 3676 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:38,016 INFO L231 Difference]: Finished difference. Result has 236 places, 305 transitions, 2996 flow [2024-06-27 20:34:38,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2996, PETRI_PLACES=236, PETRI_TRANSITIONS=305} [2024-06-27 20:34:38,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-27 20:34:38,016 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 305 transitions, 2996 flow [2024-06-27 20:34:38,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:38,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:34:38,017 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:38,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash -614181914, now seen corresponding path program 1 times [2024-06-27 20:34:38,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:38,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61616767] [2024-06-27 20:34:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:38,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:38,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:38,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61616767] [2024-06-27 20:34:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61616767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:38,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:38,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577564109] [2024-06-27 20:34:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:38,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:39,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:39,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 305 transitions, 2996 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:39,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:39,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:39,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:39,803 INFO L124 PetriNetUnfolderBase]: 2873/4468 cut-off events. [2024-06-27 20:34:39,804 INFO L125 PetriNetUnfolderBase]: For 591535/591537 co-relation queries the response was YES. [2024-06-27 20:34:39,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39164 conditions, 4468 events. 2873/4468 cut-off events. For 591535/591537 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24490 event pairs, 808 based on Foata normal form. 1/4466 useless extension candidates. Maximal degree in co-relation 39053. Up to 4326 conditions per place. [2024-06-27 20:34:39,856 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 21 changer transitions 0/319 dead transitions. [2024-06-27 20:34:39,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 319 transitions, 3730 flow [2024-06-27 20:34:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 20:34:39,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-27 20:34:39,857 INFO L175 Difference]: Start difference. First operand has 236 places, 305 transitions, 2996 flow. Second operand 9 states and 130 transitions. [2024-06-27 20:34:39,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 319 transitions, 3730 flow [2024-06-27 20:34:40,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 319 transitions, 3584 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:40,417 INFO L231 Difference]: Finished difference. Result has 237 places, 308 transitions, 2980 flow [2024-06-27 20:34:40,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2980, PETRI_PLACES=237, PETRI_TRANSITIONS=308} [2024-06-27 20:34:40,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:34:40,418 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 308 transitions, 2980 flow [2024-06-27 20:34:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:40,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:40,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:40,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:34:40,418 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:40,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:40,419 INFO L85 PathProgramCache]: Analyzing trace with hash 937940974, now seen corresponding path program 1 times [2024-06-27 20:34:40,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009739072] [2024-06-27 20:34:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:40,961 INFO 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 20:34:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009739072] [2024-06-27 20:34:40,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009739072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818785419] [2024-06-27 20:34:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:40,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:40,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:41,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:41,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 308 transitions, 2980 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:41,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:41,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:41,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:41,924 INFO L124 PetriNetUnfolderBase]: 2817/4424 cut-off events. [2024-06-27 20:34:41,924 INFO L125 PetriNetUnfolderBase]: For 615405/615415 co-relation queries the response was YES. [2024-06-27 20:34:41,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 4424 events. 2817/4424 cut-off events. For 615405/615415 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 24569 event pairs, 545 based on Foata normal form. 12/4432 useless extension candidates. Maximal degree in co-relation 39309. Up to 3937 conditions per place. [2024-06-27 20:34:41,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 38 changer transitions 0/339 dead transitions. [2024-06-27 20:34:41,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 339 transitions, 3782 flow [2024-06-27 20:34:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:34:41,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:34:41,974 INFO L175 Difference]: Start difference. First operand has 237 places, 308 transitions, 2980 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:34:41,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 339 transitions, 3782 flow [2024-06-27 20:34:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 339 transitions, 3601 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-27 20:34:42,733 INFO L231 Difference]: Finished difference. Result has 235 places, 311 transitions, 2977 flow [2024-06-27 20:34:42,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2977, PETRI_PLACES=235, PETRI_TRANSITIONS=311} [2024-06-27 20:34:42,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:34:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 311 transitions, 2977 flow [2024-06-27 20:34:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:42,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:42,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:34:42,735 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:42,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 946511854, now seen corresponding path program 2 times [2024-06-27 20:34:42,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:42,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467326463] [2024-06-27 20:34:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:43,384 INFO 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 20:34:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:43,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467326463] [2024-06-27 20:34:43,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467326463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:43,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:43,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:43,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802877176] [2024-06-27 20:34:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:43,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:43,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:43,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:43,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 311 transitions, 2977 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:43,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:43,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:43,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:44,289 INFO L124 PetriNetUnfolderBase]: 2833/4448 cut-off events. [2024-06-27 20:34:44,289 INFO L125 PetriNetUnfolderBase]: For 632711/632721 co-relation queries the response was YES. [2024-06-27 20:34:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40179 conditions, 4448 events. 2833/4448 cut-off events. For 632711/632721 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24731 event pairs, 705 based on Foata normal form. 12/4456 useless extension candidates. Maximal degree in co-relation 40067. Up to 4014 conditions per place. [2024-06-27 20:34:44,338 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 39 changer transitions 0/338 dead transitions. [2024-06-27 20:34:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 338 transitions, 3771 flow [2024-06-27 20:34:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:34:44,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:34:44,352 INFO L175 Difference]: Start difference. First operand has 235 places, 311 transitions, 2977 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:34:44,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 338 transitions, 3771 flow [2024-06-27 20:34:45,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 338 transitions, 3615 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:45,106 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3007 flow [2024-06-27 20:34:45,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3007, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-27 20:34:45,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:34:45,107 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3007 flow [2024-06-27 20:34:45,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:45,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:45,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:45,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:34:45,107 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:45,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 946522766, now seen corresponding path program 1 times [2024-06-27 20:34:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:45,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971860088] [2024-06-27 20:34:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:45,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:45,759 INFO 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 20:34:45,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:45,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971860088] [2024-06-27 20:34:45,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971860088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:45,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:45,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854958582] [2024-06-27 20:34:45,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:45,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:45,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:45,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:45,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:45,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3007 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:45,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:45,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:45,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:46,687 INFO L124 PetriNetUnfolderBase]: 2915/4534 cut-off events. [2024-06-27 20:34:46,688 INFO L125 PetriNetUnfolderBase]: For 640921/640931 co-relation queries the response was YES. [2024-06-27 20:34:46,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40841 conditions, 4534 events. 2915/4534 cut-off events. For 640921/640931 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24897 event pairs, 734 based on Foata normal form. 10/4540 useless extension candidates. Maximal degree in co-relation 40728. Up to 4246 conditions per place. [2024-06-27 20:34:46,740 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/342 dead transitions. [2024-06-27 20:34:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 342 transitions, 3857 flow [2024-06-27 20:34:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:34:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:34:46,742 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3007 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:34:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 342 transitions, 3857 flow [2024-06-27 20:34:47,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 3693 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:47,466 INFO L231 Difference]: Finished difference. Result has 240 places, 318 transitions, 3042 flow [2024-06-27 20:34:47,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3042, PETRI_PLACES=240, PETRI_TRANSITIONS=318} [2024-06-27 20:34:47,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 20:34:47,467 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 318 transitions, 3042 flow [2024-06-27 20:34:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:47,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:47,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:34:47,467 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:47,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1056270826, now seen corresponding path program 1 times [2024-06-27 20:34:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:47,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620819427] [2024-06-27 20:34:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:48,126 INFO 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 20:34:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:48,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620819427] [2024-06-27 20:34:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620819427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:48,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133295776] [2024-06-27 20:34:48,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:48,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:48,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 318 transitions, 3042 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:48,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:48,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:48,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:49,160 INFO L124 PetriNetUnfolderBase]: 2861/4479 cut-off events. [2024-06-27 20:34:49,161 INFO L125 PetriNetUnfolderBase]: For 665831/665839 co-relation queries the response was YES. [2024-06-27 20:34:49,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41205 conditions, 4479 events. 2861/4479 cut-off events. For 665831/665839 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24886 event pairs, 655 based on Foata normal form. 5/4480 useless extension candidates. Maximal degree in co-relation 41091. Up to 3748 conditions per place. [2024-06-27 20:34:49,209 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 244 selfloop transitions, 84 changer transitions 0/356 dead transitions. [2024-06-27 20:34:49,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 356 transitions, 3939 flow [2024-06-27 20:34:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:34:49,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:34:49,210 INFO L175 Difference]: Start difference. First operand has 240 places, 318 transitions, 3042 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:34:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 356 transitions, 3939 flow [2024-06-27 20:34:50,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 356 transitions, 3768 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:50,073 INFO L231 Difference]: Finished difference. Result has 242 places, 331 transitions, 3228 flow [2024-06-27 20:34:50,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3228, PETRI_PLACES=242, PETRI_TRANSITIONS=331} [2024-06-27 20:34:50,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 20:34:50,074 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 331 transitions, 3228 flow [2024-06-27 20:34:50,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:50,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:50,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:34:50,074 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:50,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1056390982, now seen corresponding path program 1 times [2024-06-27 20:34:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513727227] [2024-06-27 20:34:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:50,693 INFO 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 20:34:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513727227] [2024-06-27 20:34:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513727227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:50,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:50,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436015327] [2024-06-27 20:34:50,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:50,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:50,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 331 transitions, 3228 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:50,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:50,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:50,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:51,607 INFO L124 PetriNetUnfolderBase]: 2945/4563 cut-off events. [2024-06-27 20:34:51,608 INFO L125 PetriNetUnfolderBase]: For 675110/675118 co-relation queries the response was YES. [2024-06-27 20:34:51,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42815 conditions, 4563 events. 2945/4563 cut-off events. For 675110/675118 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24945 event pairs, 698 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 42699. Up to 4290 conditions per place. [2024-06-27 20:34:51,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 40 changer transitions 0/355 dead transitions. [2024-06-27 20:34:51,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 355 transitions, 4061 flow [2024-06-27 20:34:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:34:51,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:34:51,665 INFO L175 Difference]: Start difference. First operand has 242 places, 331 transitions, 3228 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:34:51,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 355 transitions, 4061 flow [2024-06-27 20:34:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 355 transitions, 3857 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:52,461 INFO L231 Difference]: Finished difference. Result has 246 places, 335 transitions, 3186 flow [2024-06-27 20:34:52,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3186, PETRI_PLACES=246, PETRI_TRANSITIONS=335} [2024-06-27 20:34:52,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 20:34:52,461 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 335 transitions, 3186 flow [2024-06-27 20:34:52,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:52,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:52,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:52,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:34:52,462 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:52,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 578121128, now seen corresponding path program 2 times [2024-06-27 20:34:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:52,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835827437] [2024-06-27 20:34:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:53,041 INFO 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 20:34:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835827437] [2024-06-27 20:34:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835827437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:53,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147162907] [2024-06-27 20:34:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:53,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 335 transitions, 3186 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:53,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:53,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:53,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:53,942 INFO L124 PetriNetUnfolderBase]: 2907/4539 cut-off events. [2024-06-27 20:34:53,942 INFO L125 PetriNetUnfolderBase]: For 709359/709367 co-relation queries the response was YES. [2024-06-27 20:34:53,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42993 conditions, 4539 events. 2907/4539 cut-off events. For 709359/709367 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25147 event pairs, 662 based on Foata normal form. 5/4540 useless extension candidates. Maximal degree in co-relation 42876. Up to 3766 conditions per place. [2024-06-27 20:34:54,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 93 changer transitions 0/366 dead transitions. [2024-06-27 20:34:54,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 366 transitions, 4290 flow [2024-06-27 20:34:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:34:54,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:34:54,001 INFO L175 Difference]: Start difference. First operand has 246 places, 335 transitions, 3186 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:34:54,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 366 transitions, 4290 flow [2024-06-27 20:34:54,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 366 transitions, 4173 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:54,830 INFO L231 Difference]: Finished difference. Result has 248 places, 343 transitions, 3458 flow [2024-06-27 20:34:54,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=248, PETRI_TRANSITIONS=343} [2024-06-27 20:34:54,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 20:34:54,830 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 343 transitions, 3458 flow [2024-06-27 20:34:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:54,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:54,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:34:54,831 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:54,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1233522502, now seen corresponding path program 2 times [2024-06-27 20:34:54,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:54,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567504161] [2024-06-27 20:34:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:55,407 INFO 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 20:34:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:55,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567504161] [2024-06-27 20:34:55,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567504161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576349466] [2024-06-27 20:34:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:55,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:55,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:34:55,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 343 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:55,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:55,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:34:55,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:56,276 INFO L124 PetriNetUnfolderBase]: 2999/4637 cut-off events. [2024-06-27 20:34:56,276 INFO L125 PetriNetUnfolderBase]: For 725436/725444 co-relation queries the response was YES. [2024-06-27 20:34:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44585 conditions, 4637 events. 2999/4637 cut-off events. For 725436/725444 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25319 event pairs, 680 based on Foata normal form. 6/4639 useless extension candidates. Maximal degree in co-relation 44467. Up to 4276 conditions per place. [2024-06-27 20:34:56,330 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 67 changer transitions 0/368 dead transitions. [2024-06-27 20:34:56,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 368 transitions, 4708 flow [2024-06-27 20:34:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:34:56,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:34:56,331 INFO L175 Difference]: Start difference. First operand has 248 places, 343 transitions, 3458 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:34:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 368 transitions, 4708 flow [2024-06-27 20:34:57,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 368 transitions, 4509 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:57,046 INFO L231 Difference]: Finished difference. Result has 252 places, 350 transitions, 3540 flow [2024-06-27 20:34:57,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=252, PETRI_TRANSITIONS=350} [2024-06-27 20:34:57,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 20:34:57,047 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 350 transitions, 3540 flow [2024-06-27 20:34:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:57,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:57,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:34:57,048 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:57,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1233522316, now seen corresponding path program 3 times [2024-06-27 20:34:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186325485] [2024-06-27 20:34:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186325485] [2024-06-27 20:34:57,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186325485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:57,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:57,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:57,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019097230] [2024-06-27 20:34:57,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:57,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:57,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:57,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:57,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:57,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 350 transitions, 3540 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:57,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:57,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:58,635 INFO L124 PetriNetUnfolderBase]: 2977/4643 cut-off events. [2024-06-27 20:34:58,635 INFO L125 PetriNetUnfolderBase]: For 764767/764775 co-relation queries the response was YES. [2024-06-27 20:34:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45491 conditions, 4643 events. 2977/4643 cut-off events. For 764767/764775 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25696 event pairs, 686 based on Foata normal form. 5/4644 useless extension candidates. Maximal degree in co-relation 45371. Up to 3725 conditions per place. [2024-06-27 20:34:58,695 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 98 changer transitions 0/377 dead transitions. [2024-06-27 20:34:58,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 377 transitions, 4666 flow [2024-06-27 20:34:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:34:58,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:34:58,697 INFO L175 Difference]: Start difference. First operand has 252 places, 350 transitions, 3540 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:34:58,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 377 transitions, 4666 flow [2024-06-27 20:34:59,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 377 transitions, 4539 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:59,850 INFO L231 Difference]: Finished difference. Result has 256 places, 357 transitions, 3796 flow [2024-06-27 20:34:59,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3796, PETRI_PLACES=256, PETRI_TRANSITIONS=357} [2024-06-27 20:34:59,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 20:34:59,851 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 357 transitions, 3796 flow [2024-06-27 20:34:59,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:59,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:59,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:34:59,852 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:59,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 755489984, now seen corresponding path program 3 times [2024-06-27 20:34:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824317982] [2024-06-27 20:34:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:00,549 INFO 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 20:35:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824317982] [2024-06-27 20:35:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824317982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:00,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19035909] [2024-06-27 20:35:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:00,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:00,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 357 transitions, 3796 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:00,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:00,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:00,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:01,458 INFO L124 PetriNetUnfolderBase]: 3045/4705 cut-off events. [2024-06-27 20:35:01,459 INFO L125 PetriNetUnfolderBase]: For 769141/769149 co-relation queries the response was YES. [2024-06-27 20:35:01,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46511 conditions, 4705 events. 3045/4705 cut-off events. For 769141/769149 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25692 event pairs, 683 based on Foata normal form. 6/4707 useless extension candidates. Maximal degree in co-relation 46390. Up to 4343 conditions per place. [2024-06-27 20:35:01,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 67 changer transitions 0/374 dead transitions. [2024-06-27 20:35:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 374 transitions, 4756 flow [2024-06-27 20:35:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:35:01,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:35:01,518 INFO L175 Difference]: Start difference. First operand has 256 places, 357 transitions, 3796 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:35:01,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 374 transitions, 4756 flow [2024-06-27 20:35:02,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4524 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:02,538 INFO L231 Difference]: Finished difference. Result has 260 places, 357 transitions, 3708 flow [2024-06-27 20:35:02,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3708, PETRI_PLACES=260, PETRI_TRANSITIONS=357} [2024-06-27 20:35:02,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 20:35:02,538 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 357 transitions, 3708 flow [2024-06-27 20:35:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:02,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:02,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:35:02,539 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:02,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 755129516, now seen corresponding path program 3 times [2024-06-27 20:35:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:02,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462797675] [2024-06-27 20:35:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:03,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:03,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462797675] [2024-06-27 20:35:03,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462797675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:03,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:03,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:03,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018534998] [2024-06-27 20:35:03,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:03,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:03,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:03,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 357 transitions, 3708 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:03,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:03,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:04,356 INFO L124 PetriNetUnfolderBase]: 2987/4655 cut-off events. [2024-06-27 20:35:04,356 INFO L125 PetriNetUnfolderBase]: For 796214/796222 co-relation queries the response was YES. [2024-06-27 20:35:04,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46583 conditions, 4655 events. 2987/4655 cut-off events. For 796214/796222 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25820 event pairs, 657 based on Foata normal form. 8/4659 useless extension candidates. Maximal degree in co-relation 46460. Up to 4180 conditions per place. [2024-06-27 20:35:04,416 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 297 selfloop transitions, 49 changer transitions 0/377 dead transitions. [2024-06-27 20:35:04,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 377 transitions, 4562 flow [2024-06-27 20:35:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:35:04,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:35:04,420 INFO L175 Difference]: Start difference. First operand has 260 places, 357 transitions, 3708 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:35:04,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 377 transitions, 4562 flow [2024-06-27 20:35:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 377 transitions, 4450 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:05,401 INFO L231 Difference]: Finished difference. Result has 262 places, 360 transitions, 3818 flow [2024-06-27 20:35:05,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3818, PETRI_PLACES=262, PETRI_TRANSITIONS=360} [2024-06-27 20:35:05,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:35:05,401 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 360 transitions, 3818 flow [2024-06-27 20:35:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:05,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:05,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:05,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:35:05,402 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:05,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash 755140428, now seen corresponding path program 2 times [2024-06-27 20:35:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:05,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146029025] [2024-06-27 20:35:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:06,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:06,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146029025] [2024-06-27 20:35:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146029025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:06,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:06,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:06,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252285303] [2024-06-27 20:35:06,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:06,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:06,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:06,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:06,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 360 transitions, 3818 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:06,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:06,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:06,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:07,167 INFO L124 PetriNetUnfolderBase]: 3103/4791 cut-off events. [2024-06-27 20:35:07,168 INFO L125 PetriNetUnfolderBase]: For 822035/822043 co-relation queries the response was YES. [2024-06-27 20:35:07,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48314 conditions, 4791 events. 3103/4791 cut-off events. For 822035/822043 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26281 event pairs, 685 based on Foata normal form. 6/4793 useless extension candidates. Maximal degree in co-relation 48190. Up to 4368 conditions per place. [2024-06-27 20:35:07,369 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 308 selfloop transitions, 79 changer transitions 0/391 dead transitions. [2024-06-27 20:35:07,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 391 transitions, 5322 flow [2024-06-27 20:35:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:35:07,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:35:07,371 INFO L175 Difference]: Start difference. First operand has 262 places, 360 transitions, 3818 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:35:07,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 391 transitions, 5322 flow [2024-06-27 20:35:08,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 391 transitions, 5122 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:08,461 INFO L231 Difference]: Finished difference. Result has 266 places, 372 transitions, 4169 flow [2024-06-27 20:35:08,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4169, PETRI_PLACES=266, PETRI_TRANSITIONS=372} [2024-06-27 20:35:08,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 20:35:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 372 transitions, 4169 flow [2024-06-27 20:35:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:35:08,466 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash 755498912, now seen corresponding path program 1 times [2024-06-27 20:35:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:08,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572061071] [2024-06-27 20:35:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:09,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:09,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572061071] [2024-06-27 20:35:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572061071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:09,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:09,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683160755] [2024-06-27 20:35:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:09,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:09,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:09,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 372 transitions, 4169 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:09,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:09,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:09,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:10,157 INFO L124 PetriNetUnfolderBase]: 3108/4804 cut-off events. [2024-06-27 20:35:10,157 INFO L125 PetriNetUnfolderBase]: For 840394/840398 co-relation queries the response was YES. [2024-06-27 20:35:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49106 conditions, 4804 events. 3108/4804 cut-off events. For 840394/840398 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26381 event pairs, 699 based on Foata normal form. 5/4806 useless extension candidates. Maximal degree in co-relation 48980. Up to 4639 conditions per place. [2024-06-27 20:35:10,222 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 23 changer transitions 0/393 dead transitions. [2024-06-27 20:35:10,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 393 transitions, 5097 flow [2024-06-27 20:35:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-27 20:35:10,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-27 20:35:10,223 INFO L175 Difference]: Start difference. First operand has 266 places, 372 transitions, 4169 flow. Second operand 9 states and 136 transitions. [2024-06-27 20:35:10,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 393 transitions, 5097 flow [2024-06-27 20:35:11,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 393 transitions, 4920 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:11,664 INFO L231 Difference]: Finished difference. Result has 271 places, 375 transitions, 4144 flow [2024-06-27 20:35:11,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4144, PETRI_PLACES=271, PETRI_TRANSITIONS=375} [2024-06-27 20:35:11,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 20:35:11,665 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 375 transitions, 4144 flow [2024-06-27 20:35:11,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:11,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:11,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:11,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:35:11,666 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:11,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1233768146, now seen corresponding path program 3 times [2024-06-27 20:35:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:11,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124193302] [2024-06-27 20:35:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:11,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:12,413 INFO 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 20:35:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124193302] [2024-06-27 20:35:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124193302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:12,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464872677] [2024-06-27 20:35:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:12,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:12,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 375 transitions, 4144 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:12,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:12,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:12,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:13,429 INFO L124 PetriNetUnfolderBase]: 3120/4818 cut-off events. [2024-06-27 20:35:13,429 INFO L125 PetriNetUnfolderBase]: For 853996/854004 co-relation queries the response was YES. [2024-06-27 20:35:13,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 4818 events. 3120/4818 cut-off events. For 853996/854004 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26420 event pairs, 675 based on Foata normal form. 6/4820 useless extension candidates. Maximal degree in co-relation 49478. Up to 4388 conditions per place. [2024-06-27 20:35:13,496 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 81 changer transitions 0/398 dead transitions. [2024-06-27 20:35:13,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 398 transitions, 5445 flow [2024-06-27 20:35:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:35:13,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 20:35:13,497 INFO L175 Difference]: Start difference. First operand has 271 places, 375 transitions, 4144 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:35:13,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 398 transitions, 5445 flow [2024-06-27 20:35:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 398 transitions, 5315 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:14,817 INFO L231 Difference]: Finished difference. Result has 273 places, 379 transitions, 4289 flow [2024-06-27 20:35:14,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4289, PETRI_PLACES=273, PETRI_TRANSITIONS=379} [2024-06-27 20:35:14,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:35:14,818 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 379 transitions, 4289 flow [2024-06-27 20:35:14,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:14,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:14,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:14,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:35:14,818 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:14,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1233756056, now seen corresponding path program 4 times [2024-06-27 20:35:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919190532] [2024-06-27 20:35:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:15,494 INFO 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 20:35:15,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:15,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919190532] [2024-06-27 20:35:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919190532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:15,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:15,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53162991] [2024-06-27 20:35:15,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:15,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:15,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 379 transitions, 4289 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:15,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:15,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:15,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:16,509 INFO L124 PetriNetUnfolderBase]: 3116/4813 cut-off events. [2024-06-27 20:35:16,509 INFO L125 PetriNetUnfolderBase]: For 863409/863417 co-relation queries the response was YES. [2024-06-27 20:35:16,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49770 conditions, 4813 events. 3116/4813 cut-off events. For 863409/863417 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26389 event pairs, 684 based on Foata normal form. 6/4815 useless extension candidates. Maximal degree in co-relation 49641. Up to 4386 conditions per place. [2024-06-27 20:35:16,679 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 81 changer transitions 0/397 dead transitions. [2024-06-27 20:35:16,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 397 transitions, 5307 flow [2024-06-27 20:35:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:35:16,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 20:35:16,681 INFO L175 Difference]: Start difference. First operand has 273 places, 379 transitions, 4289 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:35:16,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 397 transitions, 5307 flow [2024-06-27 20:35:17,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 397 transitions, 4997 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:17,815 INFO L231 Difference]: Finished difference. Result has 276 places, 379 transitions, 4148 flow [2024-06-27 20:35:17,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4148, PETRI_PLACES=276, PETRI_TRANSITIONS=379} [2024-06-27 20:35:17,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 20:35:17,816 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 379 transitions, 4148 flow [2024-06-27 20:35:17,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:17,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:17,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:17,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:35:17,816 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:17,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:17,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1052900288, now seen corresponding path program 4 times [2024-06-27 20:35:17,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:17,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549765802] [2024-06-27 20:35:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:17,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:18,331 INFO 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 20:35:18,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:18,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549765802] [2024-06-27 20:35:18,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549765802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:18,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:18,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128409037] [2024-06-27 20:35:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:18,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:18,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 379 transitions, 4148 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:18,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:18,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:18,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:19,401 INFO L124 PetriNetUnfolderBase]: 3047/4736 cut-off events. [2024-06-27 20:35:19,401 INFO L125 PetriNetUnfolderBase]: For 884049/884051 co-relation queries the response was YES. [2024-06-27 20:35:19,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49568 conditions, 4736 events. 3047/4736 cut-off events. For 884049/884051 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26224 event pairs, 674 based on Foata normal form. 2/4715 useless extension candidates. Maximal degree in co-relation 49438. Up to 4014 conditions per place. [2024-06-27 20:35:19,468 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 87 changer transitions 0/409 dead transitions. [2024-06-27 20:35:19,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 409 transitions, 5104 flow [2024-06-27 20:35:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:35:19,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:35:19,470 INFO L175 Difference]: Start difference. First operand has 276 places, 379 transitions, 4148 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:35:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 409 transitions, 5104 flow [2024-06-27 20:35:20,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 409 transitions, 4948 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:20,763 INFO L231 Difference]: Finished difference. Result has 278 places, 386 transitions, 4302 flow [2024-06-27 20:35:20,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4302, PETRI_PLACES=278, PETRI_TRANSITIONS=386} [2024-06-27 20:35:20,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:35:20,764 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 386 transitions, 4302 flow [2024-06-27 20:35:20,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:20,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:20,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:20,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:35:20,764 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:20,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash -769398812, now seen corresponding path program 5 times [2024-06-27 20:35:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351933278] [2024-06-27 20:35:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:20,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:21,327 INFO 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 20:35:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351933278] [2024-06-27 20:35:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351933278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:21,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575482661] [2024-06-27 20:35:21,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:21,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:21,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:21,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 386 transitions, 4302 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:21,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:21,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:21,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:22,451 INFO L124 PetriNetUnfolderBase]: 3057/4755 cut-off events. [2024-06-27 20:35:22,451 INFO L125 PetriNetUnfolderBase]: For 906082/906084 co-relation queries the response was YES. [2024-06-27 20:35:22,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50485 conditions, 4755 events. 3057/4755 cut-off events. For 906082/906084 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26427 event pairs, 665 based on Foata normal form. 2/4732 useless extension candidates. Maximal degree in co-relation 50353. Up to 4028 conditions per place. [2024-06-27 20:35:22,516 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 94 changer transitions 0/416 dead transitions. [2024-06-27 20:35:22,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 416 transitions, 5288 flow [2024-06-27 20:35:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:35:22,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:35:22,517 INFO L175 Difference]: Start difference. First operand has 278 places, 386 transitions, 4302 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:35:22,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 416 transitions, 5288 flow [2024-06-27 20:35:24,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 416 transitions, 5057 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:24,124 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 4409 flow [2024-06-27 20:35:24,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-27 20:35:24,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 20:35:24,134 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 4409 flow [2024-06-27 20:35:24,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:24,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:24,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:24,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:35:24,135 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:24,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -997179806, now seen corresponding path program 4 times [2024-06-27 20:35:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:24,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889587503] [2024-06-27 20:35:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:24,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:24,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889587503] [2024-06-27 20:35:24,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889587503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:24,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:24,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:24,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924666185] [2024-06-27 20:35:24,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:24,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:24,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:24,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 4409 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:24,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:24,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:25,691 INFO L124 PetriNetUnfolderBase]: 3129/4828 cut-off events. [2024-06-27 20:35:25,692 INFO L125 PetriNetUnfolderBase]: For 913245/913247 co-relation queries the response was YES. [2024-06-27 20:35:25,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51222 conditions, 4828 events. 3129/4828 cut-off events. For 913245/913247 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26413 event pairs, 688 based on Foata normal form. 1/4816 useless extension candidates. Maximal degree in co-relation 51088. Up to 4560 conditions per place. [2024-06-27 20:35:25,756 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 38 changer transitions 0/411 dead transitions. [2024-06-27 20:35:25,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 411 transitions, 5283 flow [2024-06-27 20:35:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:35:25,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:35:25,757 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 4409 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:35:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 411 transitions, 5283 flow [2024-06-27 20:35:27,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 411 transitions, 5041 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:27,172 INFO L231 Difference]: Finished difference. Result has 287 places, 393 transitions, 4249 flow [2024-06-27 20:35:27,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4249, PETRI_PLACES=287, PETRI_TRANSITIONS=393} [2024-06-27 20:35:27,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:35:27,173 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 393 transitions, 4249 flow [2024-06-27 20:35:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:27,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:27,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:27,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:35:27,174 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:27,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash 655874044, now seen corresponding path program 6 times [2024-06-27 20:35:27,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:27,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735791675] [2024-06-27 20:35:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:27,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735791675] [2024-06-27 20:35:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735791675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:27,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:27,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056723997] [2024-06-27 20:35:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:27,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:27,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:27,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:27,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:27,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 393 transitions, 4249 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:27,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:27,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:27,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:28,731 INFO L124 PetriNetUnfolderBase]: 3065/4758 cut-off events. [2024-06-27 20:35:28,731 INFO L125 PetriNetUnfolderBase]: For 944110/944114 co-relation queries the response was YES. [2024-06-27 20:35:28,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50990 conditions, 4758 events. 3065/4758 cut-off events. For 944110/944114 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26326 event pairs, 665 based on Foata normal form. 2/4732 useless extension candidates. Maximal degree in co-relation 50855. Up to 3999 conditions per place. [2024-06-27 20:35:28,794 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 106 changer transitions 0/417 dead transitions. [2024-06-27 20:35:28,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 417 transitions, 5207 flow [2024-06-27 20:35:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:35:28,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:35:28,795 INFO L175 Difference]: Start difference. First operand has 287 places, 393 transitions, 4249 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:35:28,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 417 transitions, 5207 flow [2024-06-27 20:35:30,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 417 transitions, 4972 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 20:35:30,254 INFO L231 Difference]: Finished difference. Result has 285 places, 396 transitions, 4336 flow [2024-06-27 20:35:30,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4336, PETRI_PLACES=285, PETRI_TRANSITIONS=396} [2024-06-27 20:35:30,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 20:35:30,255 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 396 transitions, 4336 flow [2024-06-27 20:35:30,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:30,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:30,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:35:30,255 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:30,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -997179992, now seen corresponding path program 7 times [2024-06-27 20:35:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:30,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053670005] [2024-06-27 20:35:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:30,813 INFO 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 20:35:30,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:30,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053670005] [2024-06-27 20:35:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053670005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:30,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:30,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145521203] [2024-06-27 20:35:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:30,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:30,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:30,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 396 transitions, 4336 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:30,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:30,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:30,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:31,857 INFO L124 PetriNetUnfolderBase]: 3062/4757 cut-off events. [2024-06-27 20:35:31,857 INFO L125 PetriNetUnfolderBase]: For 956795/956797 co-relation queries the response was YES. [2024-06-27 20:35:31,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51584 conditions, 4757 events. 3062/4757 cut-off events. For 956795/956797 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26282 event pairs, 678 based on Foata normal form. 2/4736 useless extension candidates. Maximal degree in co-relation 51448. Up to 4008 conditions per place. [2024-06-27 20:35:31,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 100 changer transitions 0/423 dead transitions. [2024-06-27 20:35:31,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 423 transitions, 5592 flow [2024-06-27 20:35:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:35:31,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:35:31,922 INFO L175 Difference]: Start difference. First operand has 285 places, 396 transitions, 4336 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:35:31,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 423 transitions, 5592 flow [2024-06-27 20:35:33,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 423 transitions, 5292 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:33,462 INFO L231 Difference]: Finished difference. Result has 287 places, 402 transitions, 4444 flow [2024-06-27 20:35:33,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=287, PETRI_TRANSITIONS=402} [2024-06-27 20:35:33,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:35:33,463 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 402 transitions, 4444 flow [2024-06-27 20:35:33,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:33,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:33,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:33,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:35:33,464 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:33,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -642679802, now seen corresponding path program 8 times [2024-06-27 20:35:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:33,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689515618] [2024-06-27 20:35:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:34,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689515618] [2024-06-27 20:35:34,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689515618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:34,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:34,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:34,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802126602] [2024-06-27 20:35:34,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:34,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:34,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:34,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 402 transitions, 4444 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:34,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:34,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:34,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:35,112 INFO L124 PetriNetUnfolderBase]: 3099/4806 cut-off events. [2024-06-27 20:35:35,113 INFO L125 PetriNetUnfolderBase]: For 1000795/1000799 co-relation queries the response was YES. [2024-06-27 20:35:35,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52829 conditions, 4806 events. 3099/4806 cut-off events. For 1000795/1000799 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26615 event pairs, 675 based on Foata normal form. 2/4780 useless extension candidates. Maximal degree in co-relation 52692. Up to 3950 conditions per place. [2024-06-27 20:35:35,177 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 137 changer transitions 0/431 dead transitions. [2024-06-27 20:35:35,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 431 transitions, 6032 flow [2024-06-27 20:35:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:35:35,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:35:35,178 INFO L175 Difference]: Start difference. First operand has 287 places, 402 transitions, 4444 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:35:35,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 431 transitions, 6032 flow [2024-06-27 20:35:36,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 431 transitions, 5825 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:36,986 INFO L231 Difference]: Finished difference. Result has 291 places, 411 transitions, 4841 flow [2024-06-27 20:35:36,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4841, PETRI_PLACES=291, PETRI_TRANSITIONS=411} [2024-06-27 20:35:36,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-27 20:35:36,987 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 411 transitions, 4841 flow [2024-06-27 20:35:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:36,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:36,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:35:36,987 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:36,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -642916952, now seen corresponding path program 9 times [2024-06-27 20:35:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:36,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139586619] [2024-06-27 20:35:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:37,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139586619] [2024-06-27 20:35:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139586619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:37,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047329429] [2024-06-27 20:35:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:37,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:37,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:37,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:37,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 411 transitions, 4841 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:37,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:37,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:37,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:38,710 INFO L124 PetriNetUnfolderBase]: 3093/4798 cut-off events. [2024-06-27 20:35:38,710 INFO L125 PetriNetUnfolderBase]: For 1013594/1013598 co-relation queries the response was YES. [2024-06-27 20:35:38,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53372 conditions, 4798 events. 3093/4798 cut-off events. For 1013594/1013598 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26591 event pairs, 672 based on Foata normal form. 2/4772 useless extension candidates. Maximal degree in co-relation 53233. Up to 3945 conditions per place. [2024-06-27 20:35:38,778 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 137 changer transitions 0/431 dead transitions. [2024-06-27 20:35:38,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 431 transitions, 6115 flow [2024-06-27 20:35:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:35:38,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:35:38,780 INFO L175 Difference]: Start difference. First operand has 291 places, 411 transitions, 4841 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:35:38,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 431 transitions, 6115 flow [2024-06-27 20:35:40,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 431 transitions, 5826 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 20:35:40,561 INFO L231 Difference]: Finished difference. Result has 296 places, 411 transitions, 4832 flow [2024-06-27 20:35:40,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4832, PETRI_PLACES=296, PETRI_TRANSITIONS=411} [2024-06-27 20:35:40,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 20:35:40,561 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 411 transitions, 4832 flow [2024-06-27 20:35:40,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:40,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:40,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:35:40,562 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:40,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -642916766, now seen corresponding path program 5 times [2024-06-27 20:35:40,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:40,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147419709] [2024-06-27 20:35:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:40,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:41,214 INFO 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 20:35:41,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:41,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147419709] [2024-06-27 20:35:41,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147419709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:41,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:41,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792166698] [2024-06-27 20:35:41,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:41,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:41,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:41,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:41,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 411 transitions, 4832 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:41,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:41,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:41,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:42,238 INFO L124 PetriNetUnfolderBase]: 3182/4900 cut-off events. [2024-06-27 20:35:42,239 INFO L125 PetriNetUnfolderBase]: For 1021067/1021069 co-relation queries the response was YES. [2024-06-27 20:35:42,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54191 conditions, 4900 events. 3182/4900 cut-off events. For 1021067/1021069 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26807 event pairs, 688 based on Foata normal form. 1/4888 useless extension candidates. Maximal degree in co-relation 54050. Up to 4598 conditions per place. [2024-06-27 20:35:42,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 57 changer transitions 0/433 dead transitions. [2024-06-27 20:35:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 433 transitions, 6054 flow [2024-06-27 20:35:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:35:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:35:42,306 INFO L175 Difference]: Start difference. First operand has 296 places, 411 transitions, 4832 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:35:42,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 433 transitions, 6054 flow [2024-06-27 20:35:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 433 transitions, 5743 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:44,402 INFO L231 Difference]: Finished difference. Result has 299 places, 417 transitions, 4779 flow [2024-06-27 20:35:44,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4521, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=299, PETRI_TRANSITIONS=417} [2024-06-27 20:35:44,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 20:35:44,405 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 417 transitions, 4779 flow [2024-06-27 20:35:44,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:44,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:44,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:44,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:35:44,405 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:44,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash -642501056, now seen corresponding path program 6 times [2024-06-27 20:35:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:44,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554486646] [2024-06-27 20:35:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:44,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554486646] [2024-06-27 20:35:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554486646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:45,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:45,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836057215] [2024-06-27 20:35:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:45,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 417 transitions, 4779 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:45,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:45,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:45,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:46,155 INFO L124 PetriNetUnfolderBase]: 3179/4896 cut-off events. [2024-06-27 20:35:46,155 INFO L125 PetriNetUnfolderBase]: For 1034320/1034322 co-relation queries the response was YES. [2024-06-27 20:35:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53893 conditions, 4896 events. 3179/4896 cut-off events. For 1034320/1034322 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 26750 event pairs, 688 based on Foata normal form. 1/4884 useless extension candidates. Maximal degree in co-relation 53750. Up to 4595 conditions per place. [2024-06-27 20:35:46,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 59 changer transitions 0/432 dead transitions. [2024-06-27 20:35:46,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 432 transitions, 5683 flow [2024-06-27 20:35:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:35:46,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:35:46,217 INFO L175 Difference]: Start difference. First operand has 299 places, 417 transitions, 4779 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:35:46,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 432 transitions, 5683 flow [2024-06-27 20:35:48,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 432 transitions, 5501 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:48,339 INFO L231 Difference]: Finished difference. Result has 302 places, 417 transitions, 4721 flow [2024-06-27 20:35:48,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4721, PETRI_PLACES=302, PETRI_TRANSITIONS=417} [2024-06-27 20:35:48,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:35:48,340 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 417 transitions, 4721 flow [2024-06-27 20:35:48,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:48,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:48,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:48,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:35:48,340 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:48,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1859436356, now seen corresponding path program 7 times [2024-06-27 20:35:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:48,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20402393] [2024-06-27 20:35:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:49,056 INFO 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 20:35:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20402393] [2024-06-27 20:35:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20402393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:49,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:49,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95364820] [2024-06-27 20:35:49,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:49,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:49,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:49,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:49,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 417 transitions, 4721 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:49,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:49,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:49,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:50,042 INFO L124 PetriNetUnfolderBase]: 3181/4904 cut-off events. [2024-06-27 20:35:50,042 INFO L125 PetriNetUnfolderBase]: For 1054818/1054826 co-relation queries the response was YES. [2024-06-27 20:35:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53981 conditions, 4904 events. 3181/4904 cut-off events. For 1054818/1054826 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26868 event pairs, 710 based on Foata normal form. 6/4895 useless extension candidates. Maximal degree in co-relation 53837. Up to 4425 conditions per place. [2024-06-27 20:35:50,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 112 changer transitions 0/433 dead transitions. [2024-06-27 20:35:50,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 433 transitions, 6080 flow [2024-06-27 20:35:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:35:50,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:35:50,114 INFO L175 Difference]: Start difference. First operand has 302 places, 417 transitions, 4721 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:35:50,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 433 transitions, 6080 flow [2024-06-27 20:35:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 433 transitions, 5958 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:52,149 INFO L231 Difference]: Finished difference. Result has 303 places, 420 transitions, 4898 flow [2024-06-27 20:35:52,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4898, PETRI_PLACES=303, PETRI_TRANSITIONS=420} [2024-06-27 20:35:52,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 20:35:52,150 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 420 transitions, 4898 flow [2024-06-27 20:35:52,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:52,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:52,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:52,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:35:52,151 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:52,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:52,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2083421230, now seen corresponding path program 8 times [2024-06-27 20:35:52,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:52,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835178683] [2024-06-27 20:35:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:52,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:52,855 INFO 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 20:35:52,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:52,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835178683] [2024-06-27 20:35:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835178683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:52,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883398093] [2024-06-27 20:35:52,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:52,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:52,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:52,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:35:52,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 420 transitions, 4898 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:52,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:52,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:35:52,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:53,868 INFO L124 PetriNetUnfolderBase]: 3202/4931 cut-off events. [2024-06-27 20:35:53,868 INFO L125 PetriNetUnfolderBase]: For 1080898/1080906 co-relation queries the response was YES. [2024-06-27 20:35:53,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54831 conditions, 4931 events. 3202/4931 cut-off events. For 1080898/1080906 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27014 event pairs, 708 based on Foata normal form. 5/4921 useless extension candidates. Maximal degree in co-relation 54686. Up to 4444 conditions per place. [2024-06-27 20:35:53,940 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 125 changer transitions 0/440 dead transitions. [2024-06-27 20:35:53,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 440 transitions, 6362 flow [2024-06-27 20:35:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:35:53,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:35:53,942 INFO L175 Difference]: Start difference. First operand has 303 places, 420 transitions, 4898 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:35:53,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 440 transitions, 6362 flow [2024-06-27 20:35:55,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 440 transitions, 6101 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:35:56,002 INFO L231 Difference]: Finished difference. Result has 307 places, 427 transitions, 5074 flow [2024-06-27 20:35:56,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5074, PETRI_PLACES=307, PETRI_TRANSITIONS=427} [2024-06-27 20:35:56,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 20:35:56,003 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 427 transitions, 5074 flow [2024-06-27 20:35:56,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:56,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:56,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:35:56,003 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:56,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1698800018, now seen corresponding path program 10 times [2024-06-27 20:35:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271944899] [2024-06-27 20:35:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:56,712 INFO 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 20:35:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271944899] [2024-06-27 20:35:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271944899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870262584] [2024-06-27 20:35:56,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:56,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:56,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 427 transitions, 5074 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:56,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:56,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:57,771 INFO L124 PetriNetUnfolderBase]: 3165/4913 cut-off events. [2024-06-27 20:35:57,771 INFO L125 PetriNetUnfolderBase]: For 1141240/1141250 co-relation queries the response was YES. [2024-06-27 20:35:57,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56077 conditions, 4913 events. 3165/4913 cut-off events. For 1141240/1141250 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27287 event pairs, 748 based on Foata normal form. 3/4894 useless extension candidates. Maximal degree in co-relation 55930. Up to 3816 conditions per place. [2024-06-27 20:35:57,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 151 changer transitions 0/458 dead transitions. [2024-06-27 20:35:57,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 458 transitions, 7060 flow [2024-06-27 20:35:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:35:57,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:35:57,837 INFO L175 Difference]: Start difference. First operand has 307 places, 427 transitions, 5074 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:35:57,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 458 transitions, 7060 flow [2024-06-27 20:35:59,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 458 transitions, 6858 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:59,933 INFO L231 Difference]: Finished difference. Result has 311 places, 440 transitions, 5636 flow [2024-06-27 20:35:59,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5636, PETRI_PLACES=311, PETRI_TRANSITIONS=440} [2024-06-27 20:35:59,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 20:35:59,934 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 440 transitions, 5636 flow [2024-06-27 20:35:59,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:59,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:59,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:59,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:35:59,934 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:59,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash 936804348, now seen corresponding path program 11 times [2024-06-27 20:35:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358249953] [2024-06-27 20:35:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:00,574 INFO 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 20:36:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358249953] [2024-06-27 20:36:00,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358249953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:00,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:00,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:00,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908065683] [2024-06-27 20:36:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:00,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:00,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:36:00,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 440 transitions, 5636 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:00,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:00,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:36:00,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:01,619 INFO L124 PetriNetUnfolderBase]: 3159/4905 cut-off events. [2024-06-27 20:36:01,619 INFO L125 PetriNetUnfolderBase]: For 1158376/1158386 co-relation queries the response was YES. [2024-06-27 20:36:01,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56673 conditions, 4905 events. 3159/4905 cut-off events. For 1158376/1158386 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27281 event pairs, 748 based on Foata normal form. 3/4886 useless extension candidates. Maximal degree in co-relation 56525. Up to 3813 conditions per place. [2024-06-27 20:36:01,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 153 changer transitions 0/456 dead transitions. [2024-06-27 20:36:01,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 456 transitions, 6958 flow [2024-06-27 20:36:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:36:01,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:36:01,691 INFO L175 Difference]: Start difference. First operand has 311 places, 440 transitions, 5636 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:36:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 456 transitions, 6958 flow [2024-06-27 20:36:03,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 456 transitions, 6623 flow, removed 134 selfloop flow, removed 2 redundant places. [2024-06-27 20:36:03,866 INFO L231 Difference]: Finished difference. Result has 317 places, 440 transitions, 5613 flow [2024-06-27 20:36:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=317, PETRI_TRANSITIONS=440} [2024-06-27 20:36:03,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 20:36:03,866 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 440 transitions, 5613 flow [2024-06-27 20:36:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:03,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:36:03,867 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:03,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1950047262, now seen corresponding path program 9 times [2024-06-27 20:36:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603165400] [2024-06-27 20:36:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:04,503 INFO 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 20:36:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603165400] [2024-06-27 20:36:04,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603165400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:04,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298809649] [2024-06-27 20:36:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:04,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:04,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 440 transitions, 5613 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:04,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:04,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:04,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:05,527 INFO L124 PetriNetUnfolderBase]: 3243/4988 cut-off events. [2024-06-27 20:36:05,527 INFO L125 PetriNetUnfolderBase]: For 1145336/1145344 co-relation queries the response was YES. [2024-06-27 20:36:05,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55953 conditions, 4988 events. 3243/4988 cut-off events. For 1145336/1145344 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27319 event pairs, 711 based on Foata normal form. 5/4978 useless extension candidates. Maximal degree in co-relation 55803. Up to 4498 conditions per place. [2024-06-27 20:36:05,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 129 changer transitions 0/456 dead transitions. [2024-06-27 20:36:05,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 456 transitions, 7038 flow [2024-06-27 20:36:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:36:05,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:36:05,599 INFO L175 Difference]: Start difference. First operand has 317 places, 440 transitions, 5613 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:36:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 456 transitions, 7038 flow [2024-06-27 20:36:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 456 transitions, 6722 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:07,401 INFO L231 Difference]: Finished difference. Result has 319 places, 443 transitions, 5630 flow [2024-06-27 20:36:07,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5297, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5630, PETRI_PLACES=319, PETRI_TRANSITIONS=443} [2024-06-27 20:36:07,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 20:36:07,402 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 443 transitions, 5630 flow [2024-06-27 20:36:07,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:07,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:07,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:36:07,403 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:07,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2077165120, now seen corresponding path program 10 times [2024-06-27 20:36:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498536693] [2024-06-27 20:36:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:08,035 INFO 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 20:36:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498536693] [2024-06-27 20:36:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498536693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281693270] [2024-06-27 20:36:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:08,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:08,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 443 transitions, 5630 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:08,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:08,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:08,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:09,024 INFO L124 PetriNetUnfolderBase]: 3238/4982 cut-off events. [2024-06-27 20:36:09,024 INFO L125 PetriNetUnfolderBase]: For 1159577/1159585 co-relation queries the response was YES. [2024-06-27 20:36:09,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55750 conditions, 4982 events. 3238/4982 cut-off events. For 1159577/1159585 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27264 event pairs, 711 based on Foata normal form. 5/4972 useless extension candidates. Maximal degree in co-relation 55599. Up to 4493 conditions per place. [2024-06-27 20:36:09,097 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 130 changer transitions 0/456 dead transitions. [2024-06-27 20:36:09,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 456 transitions, 6990 flow [2024-06-27 20:36:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:36:09,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:36:09,099 INFO L175 Difference]: Start difference. First operand has 319 places, 443 transitions, 5630 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:36:09,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 456 transitions, 6990 flow [2024-06-27 20:36:11,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 456 transitions, 6690 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 20:36:11,654 INFO L231 Difference]: Finished difference. Result has 322 places, 443 transitions, 5596 flow [2024-06-27 20:36:11,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5596, PETRI_PLACES=322, PETRI_TRANSITIONS=443} [2024-06-27 20:36:11,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:36:11,655 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 443 transitions, 5596 flow [2024-06-27 20:36:11,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:11,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:11,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:36:11,655 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:11,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2021153666, now seen corresponding path program 12 times [2024-06-27 20:36:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209844205] [2024-06-27 20:36:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:12,293 INFO 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 20:36:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:12,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209844205] [2024-06-27 20:36:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209844205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:12,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:12,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:12,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910069311] [2024-06-27 20:36:12,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:12,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:12,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:12,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:12,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:36:12,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 443 transitions, 5596 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:12,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:12,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:36:12,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:13,443 INFO L124 PetriNetUnfolderBase]: 3150/4895 cut-off events. [2024-06-27 20:36:13,443 INFO L125 PetriNetUnfolderBase]: For 1182824/1182834 co-relation queries the response was YES. [2024-06-27 20:36:13,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55103 conditions, 4895 events. 3150/4895 cut-off events. For 1182824/1182834 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27220 event pairs, 743 based on Foata normal form. 5/4878 useless extension candidates. Maximal degree in co-relation 54952. Up to 3808 conditions per place. [2024-06-27 20:36:13,512 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 147 changer transitions 0/459 dead transitions. [2024-06-27 20:36:13,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 459 transitions, 6934 flow [2024-06-27 20:36:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:36:13,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:36:13,514 INFO L175 Difference]: Start difference. First operand has 322 places, 443 transitions, 5596 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:36:13,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 459 transitions, 6934 flow [2024-06-27 20:36:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 459 transitions, 6477 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-27 20:36:15,813 INFO L231 Difference]: Finished difference. Result has 320 places, 443 transitions, 5440 flow [2024-06-27 20:36:15,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5139, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5440, PETRI_PLACES=320, PETRI_TRANSITIONS=443} [2024-06-27 20:36:15,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:36:15,814 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 443 transitions, 5440 flow [2024-06-27 20:36:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:15,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:15,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:36:15,814 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:15,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2021153852, now seen corresponding path program 11 times [2024-06-27 20:36:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:15,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223767286] [2024-06-27 20:36:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:16,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223767286] [2024-06-27 20:36:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223767286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:16,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581247833] [2024-06-27 20:36:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:16,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:16,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:16,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 443 transitions, 5440 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:16,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:16,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:16,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:17,586 INFO L124 PetriNetUnfolderBase]: 3220/4956 cut-off events. [2024-06-27 20:36:17,587 INFO L125 PetriNetUnfolderBase]: For 1171538/1171546 co-relation queries the response was YES. [2024-06-27 20:36:17,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55112 conditions, 4956 events. 3220/4956 cut-off events. For 1171538/1171546 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27088 event pairs, 709 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 54961. Up to 4472 conditions per place. [2024-06-27 20:36:17,658 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 117 changer transitions 0/455 dead transitions. [2024-06-27 20:36:17,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 455 transitions, 6590 flow [2024-06-27 20:36:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:36:17,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:36:17,659 INFO L175 Difference]: Start difference. First operand has 320 places, 443 transitions, 5440 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:36:17,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 455 transitions, 6590 flow [2024-06-27 20:36:20,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 455 transitions, 6146 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 20:36:20,059 INFO L231 Difference]: Finished difference. Result has 320 places, 443 transitions, 5237 flow [2024-06-27 20:36:20,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4996, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5237, PETRI_PLACES=320, PETRI_TRANSITIONS=443} [2024-06-27 20:36:20,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:36:20,060 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 443 transitions, 5237 flow [2024-06-27 20:36:20,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:20,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:20,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:20,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:36:20,060 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:20,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1899855040, now seen corresponding path program 12 times [2024-06-27 20:36:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:20,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771931417] [2024-06-27 20:36:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:20,765 INFO 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 20:36:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771931417] [2024-06-27 20:36:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771931417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:20,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:20,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558775172] [2024-06-27 20:36:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:20,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:20,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:20,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 443 transitions, 5237 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:20,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:20,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:20,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:21,756 INFO L124 PetriNetUnfolderBase]: 3212/4944 cut-off events. [2024-06-27 20:36:21,756 INFO L125 PetriNetUnfolderBase]: For 1179160/1179168 co-relation queries the response was YES. [2024-06-27 20:36:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54351 conditions, 4944 events. 3212/4944 cut-off events. For 1179160/1179168 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27060 event pairs, 709 based on Foata normal form. 6/4935 useless extension candidates. Maximal degree in co-relation 54200. Up to 4464 conditions per place. [2024-06-27 20:36:21,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 114 changer transitions 0/454 dead transitions. [2024-06-27 20:36:21,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 454 transitions, 6169 flow [2024-06-27 20:36:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:36:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:36:21,827 INFO L175 Difference]: Start difference. First operand has 320 places, 443 transitions, 5237 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:36:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 454 transitions, 6169 flow [2024-06-27 20:36:24,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 454 transitions, 5795 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:36:24,508 INFO L231 Difference]: Finished difference. Result has 320 places, 443 transitions, 5100 flow [2024-06-27 20:36:24,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4863, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5100, PETRI_PLACES=320, PETRI_TRANSITIONS=443} [2024-06-27 20:36:24,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:36:24,508 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 443 transitions, 5100 flow [2024-06-27 20:36:24,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:24,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:24,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:24,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:36:24,509 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:24,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1899494572, now seen corresponding path program 4 times [2024-06-27 20:36:24,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:24,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675230578] [2024-06-27 20:36:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:24,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675230578] [2024-06-27 20:36:25,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675230578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:25,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:25,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:25,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727127939] [2024-06-27 20:36:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:25,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:36:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 443 transitions, 5100 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:36:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:26,415 INFO L124 PetriNetUnfolderBase]: 3135/4869 cut-off events. [2024-06-27 20:36:26,415 INFO L125 PetriNetUnfolderBase]: For 1204958/1204966 co-relation queries the response was YES. [2024-06-27 20:36:26,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53910 conditions, 4869 events. 3135/4869 cut-off events. For 1204958/1204966 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27011 event pairs, 682 based on Foata normal form. 8/4862 useless extension candidates. Maximal degree in co-relation 53758. Up to 4351 conditions per place. [2024-06-27 20:36:26,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 65 changer transitions 0/458 dead transitions. [2024-06-27 20:36:26,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 458 transitions, 6100 flow [2024-06-27 20:36:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:26,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:36:26,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:36:26,486 INFO L175 Difference]: Start difference. First operand has 320 places, 443 transitions, 5100 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:36:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 458 transitions, 6100 flow [2024-06-27 20:36:29,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 458 transitions, 5810 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:36:29,029 INFO L231 Difference]: Finished difference. Result has 319 places, 446 transitions, 5076 flow [2024-06-27 20:36:29,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5076, PETRI_PLACES=319, PETRI_TRANSITIONS=446} [2024-06-27 20:36:29,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 20:36:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 446 transitions, 5076 flow [2024-06-27 20:36:29,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:29,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:29,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:29,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:36:29,030 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:29,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1995618542, now seen corresponding path program 5 times [2024-06-27 20:36:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:29,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030293088] [2024-06-27 20:36:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:29,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:29,703 INFO 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 20:36:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:29,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030293088] [2024-06-27 20:36:29,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030293088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:29,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:29,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:29,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043552989] [2024-06-27 20:36:29,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:29,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:29,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:29,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:29,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 446 transitions, 5076 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:29,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:29,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:29,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:30,784 INFO L124 PetriNetUnfolderBase]: 3257/5011 cut-off events. [2024-06-27 20:36:30,784 INFO L125 PetriNetUnfolderBase]: For 1234682/1234690 co-relation queries the response was YES. [2024-06-27 20:36:30,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55675 conditions, 5011 events. 3257/5011 cut-off events. For 1234682/1234690 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27491 event pairs, 706 based on Foata normal form. 6/5002 useless extension candidates. Maximal degree in co-relation 55522. Up to 4363 conditions per place. [2024-06-27 20:36:30,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 338 selfloop transitions, 144 changer transitions 0/486 dead transitions. [2024-06-27 20:36:30,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 486 transitions, 7318 flow [2024-06-27 20:36:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:36:30,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:36:30,854 INFO L175 Difference]: Start difference. First operand has 319 places, 446 transitions, 5076 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:36:30,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 486 transitions, 7318 flow [2024-06-27 20:36:33,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 486 transitions, 7074 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:33,212 INFO L231 Difference]: Finished difference. Result has 325 places, 469 transitions, 5755 flow [2024-06-27 20:36:33,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5755, PETRI_PLACES=325, PETRI_TRANSITIONS=469} [2024-06-27 20:36:33,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 20:36:33,212 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 469 transitions, 5755 flow [2024-06-27 20:36:33,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:33,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:33,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:33,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:36:33,213 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:33,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1981796448, now seen corresponding path program 2 times [2024-06-27 20:36:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:33,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247196326] [2024-06-27 20:36:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:33,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247196326] [2024-06-27 20:36:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247196326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:33,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435038421] [2024-06-27 20:36:33,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:33,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 469 transitions, 5755 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:35,109 INFO L124 PetriNetUnfolderBase]: 3270/5038 cut-off events. [2024-06-27 20:36:35,109 INFO L125 PetriNetUnfolderBase]: For 1263316/1263325 co-relation queries the response was YES. [2024-06-27 20:36:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57114 conditions, 5038 events. 3270/5038 cut-off events. For 1263316/1263325 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27727 event pairs, 706 based on Foata normal form. 7/5039 useless extension candidates. Maximal degree in co-relation 56957. Up to 4824 conditions per place. [2024-06-27 20:36:35,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 435 selfloop transitions, 54 changer transitions 0/493 dead transitions. [2024-06-27 20:36:35,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 493 transitions, 7563 flow [2024-06-27 20:36:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:36:35,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 20:36:35,177 INFO L175 Difference]: Start difference. First operand has 325 places, 469 transitions, 5755 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:36:35,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 493 transitions, 7563 flow [2024-06-27 20:36:38,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 493 transitions, 7303 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-27 20:36:38,114 INFO L231 Difference]: Finished difference. Result has 331 places, 478 transitions, 5957 flow [2024-06-27 20:36:38,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5495, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5957, PETRI_PLACES=331, PETRI_TRANSITIONS=478} [2024-06-27 20:36:38,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 20:36:38,114 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 478 transitions, 5957 flow [2024-06-27 20:36:38,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:38,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:38,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:38,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:36:38,115 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:38,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1981796882, now seen corresponding path program 6 times [2024-06-27 20:36:38,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588018120] [2024-06-27 20:36:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588018120] [2024-06-27 20:36:38,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588018120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:38,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:38,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499004107] [2024-06-27 20:36:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:38,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:39,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:39,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 478 transitions, 5957 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:39,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:39,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:39,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:40,142 INFO L124 PetriNetUnfolderBase]: 3298/5075 cut-off events. [2024-06-27 20:36:40,143 INFO L125 PetriNetUnfolderBase]: For 1303693/1303701 co-relation queries the response was YES. [2024-06-27 20:36:40,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57996 conditions, 5075 events. 3298/5075 cut-off events. For 1303693/1303701 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27919 event pairs, 702 based on Foata normal form. 6/5066 useless extension candidates. Maximal degree in co-relation 57837. Up to 4409 conditions per place. [2024-06-27 20:36:40,219 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 336 selfloop transitions, 162 changer transitions 0/502 dead transitions. [2024-06-27 20:36:40,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 502 transitions, 7751 flow [2024-06-27 20:36:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:36:40,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:36:40,220 INFO L175 Difference]: Start difference. First operand has 331 places, 478 transitions, 5957 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:36:40,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 502 transitions, 7751 flow [2024-06-27 20:36:43,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 502 transitions, 7570 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:43,952 INFO L231 Difference]: Finished difference. Result has 337 places, 486 transitions, 6328 flow [2024-06-27 20:36:43,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6328, PETRI_PLACES=337, PETRI_TRANSITIONS=486} [2024-06-27 20:36:43,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 20:36:43,952 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 486 transitions, 6328 flow [2024-06-27 20:36:43,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:43,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:43,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:36:43,953 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:43,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1995606452, now seen corresponding path program 7 times [2024-06-27 20:36:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583870642] [2024-06-27 20:36:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:44,666 INFO 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 20:36:44,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583870642] [2024-06-27 20:36:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583870642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:44,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:44,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239085866] [2024-06-27 20:36:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:44,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:44,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:44,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 486 transitions, 6328 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:44,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:44,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:44,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:45,764 INFO L124 PetriNetUnfolderBase]: 3294/5071 cut-off events. [2024-06-27 20:36:45,765 INFO L125 PetriNetUnfolderBase]: For 1311454/1311462 co-relation queries the response was YES. [2024-06-27 20:36:45,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 5071 events. 3294/5071 cut-off events. For 1311454/1311462 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27935 event pairs, 706 based on Foata normal form. 6/5062 useless extension candidates. Maximal degree in co-relation 58187. Up to 4407 conditions per place. [2024-06-27 20:36:45,846 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 147 changer transitions 0/503 dead transitions. [2024-06-27 20:36:45,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 503 transitions, 8152 flow [2024-06-27 20:36:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:36:45,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:36:45,848 INFO L175 Difference]: Start difference. First operand has 337 places, 486 transitions, 6328 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:36:45,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 503 transitions, 8152 flow [2024-06-27 20:36:49,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 503 transitions, 7735 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-27 20:36:49,165 INFO L231 Difference]: Finished difference. Result has 341 places, 486 transitions, 6213 flow [2024-06-27 20:36:49,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5911, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6213, PETRI_PLACES=341, PETRI_TRANSITIONS=486} [2024-06-27 20:36:49,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 20:36:49,166 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 486 transitions, 6213 flow [2024-06-27 20:36:49,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:49,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:49,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:49,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:36:49,166 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:49,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1469629058, now seen corresponding path program 3 times [2024-06-27 20:36:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:49,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179353528] [2024-06-27 20:36:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:49,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:49,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:49,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179353528] [2024-06-27 20:36:49,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179353528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:49,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:49,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646380439] [2024-06-27 20:36:49,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:49,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:49,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:49,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 486 transitions, 6213 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:49,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:49,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:49,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:51,053 INFO L124 PetriNetUnfolderBase]: 3299/5085 cut-off events. [2024-06-27 20:36:51,054 INFO L125 PetriNetUnfolderBase]: For 1332398/1332407 co-relation queries the response was YES. [2024-06-27 20:36:51,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58472 conditions, 5085 events. 3299/5085 cut-off events. For 1332398/1332407 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28025 event pairs, 704 based on Foata normal form. 7/5086 useless extension candidates. Maximal degree in co-relation 58309. Up to 4864 conditions per place. [2024-06-27 20:36:51,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 55 changer transitions 0/504 dead transitions. [2024-06-27 20:36:51,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 504 transitions, 7817 flow [2024-06-27 20:36:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:36:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 20:36:51,141 INFO L175 Difference]: Start difference. First operand has 341 places, 486 transitions, 6213 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:36:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 504 transitions, 7817 flow [2024-06-27 20:36:53,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 504 transitions, 7568 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:53,610 INFO L231 Difference]: Finished difference. Result has 343 places, 489 transitions, 6184 flow [2024-06-27 20:36:53,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6184, PETRI_PLACES=343, PETRI_TRANSITIONS=489} [2024-06-27 20:36:53,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 20:36:53,611 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 489 transitions, 6184 flow [2024-06-27 20:36:53,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:53,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:53,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:53,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:36:53,612 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:53,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1981321218, now seen corresponding path program 4 times [2024-06-27 20:36:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791836443] [2024-06-27 20:36:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:54,449 INFO 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 20:36:54,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791836443] [2024-06-27 20:36:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791836443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:54,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:54,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072056114] [2024-06-27 20:36:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:54,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:54,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 489 transitions, 6184 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:54,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:54,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:54,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:55,623 INFO L124 PetriNetUnfolderBase]: 3296/5076 cut-off events. [2024-06-27 20:36:55,624 INFO L125 PetriNetUnfolderBase]: For 1347686/1347688 co-relation queries the response was YES. [2024-06-27 20:36:55,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58117 conditions, 5076 events. 3296/5076 cut-off events. For 1347686/1347688 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27927 event pairs, 728 based on Foata normal form. 1/5074 useless extension candidates. Maximal degree in co-relation 57954. Up to 4923 conditions per place. [2024-06-27 20:36:55,702 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 21 changer transitions 0/500 dead transitions. [2024-06-27 20:36:55,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 500 transitions, 7204 flow [2024-06-27 20:36:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 20:36:55,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-27 20:36:55,703 INFO L175 Difference]: Start difference. First operand has 343 places, 489 transitions, 6184 flow. Second operand 9 states and 130 transitions. [2024-06-27 20:36:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 500 transitions, 7204 flow [2024-06-27 20:36:59,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 500 transitions, 6948 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:59,066 INFO L231 Difference]: Finished difference. Result has 346 places, 489 transitions, 5976 flow [2024-06-27 20:36:59,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5976, PETRI_PLACES=346, PETRI_TRANSITIONS=489} [2024-06-27 20:36:59,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:36:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 489 transitions, 5976 flow [2024-06-27 20:36:59,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:59,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:59,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:36:59,067 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:59,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1871045918, now seen corresponding path program 5 times [2024-06-27 20:36:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609363255] [2024-06-27 20:36:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:59,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609363255] [2024-06-27 20:36:59,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609363255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:59,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087073337] [2024-06-27 20:36:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:59,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:59,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 489 transitions, 5976 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:59,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:59,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:59,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:00,941 INFO L124 PetriNetUnfolderBase]: 3293/5077 cut-off events. [2024-06-27 20:37:00,941 INFO L125 PetriNetUnfolderBase]: For 1361381/1361390 co-relation queries the response was YES. [2024-06-27 20:37:00,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57902 conditions, 5077 events. 3293/5077 cut-off events. For 1361381/1361390 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27970 event pairs, 704 based on Foata normal form. 7/5078 useless extension candidates. Maximal degree in co-relation 57738. Up to 4858 conditions per place. [2024-06-27 20:37:01,018 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 54 changer transitions 0/502 dead transitions. [2024-06-27 20:37:01,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 502 transitions, 7012 flow [2024-06-27 20:37:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 20:37:01,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 20:37:01,019 INFO L175 Difference]: Start difference. First operand has 346 places, 489 transitions, 5976 flow. Second operand 9 states and 138 transitions. [2024-06-27 20:37:01,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 502 transitions, 7012 flow [2024-06-27 20:37:04,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 502 transitions, 6894 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:04,032 INFO L231 Difference]: Finished difference. Result has 347 places, 489 transitions, 5972 flow [2024-06-27 20:37:04,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=347, PETRI_TRANSITIONS=489} [2024-06-27 20:37:04,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 20:37:04,033 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 489 transitions, 5972 flow [2024-06-27 20:37:04,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:04,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:04,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:04,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:37:04,033 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:04,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1899863534, now seen corresponding path program 8 times [2024-06-27 20:37:04,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:04,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965939521] [2024-06-27 20:37:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:04,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:04,783 INFO 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 20:37:04,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965939521] [2024-06-27 20:37:04,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965939521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:04,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:04,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:04,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412679308] [2024-06-27 20:37:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:04,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:04,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:04,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:04,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 489 transitions, 5972 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:04,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:04,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:06,045 INFO L124 PetriNetUnfolderBase]: 3305/5090 cut-off events. [2024-06-27 20:37:06,045 INFO L125 PetriNetUnfolderBase]: For 1390398/1390406 co-relation queries the response was YES. [2024-06-27 20:37:06,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58325 conditions, 5090 events. 3305/5090 cut-off events. For 1390398/1390406 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 28024 event pairs, 706 based on Foata normal form. 6/5081 useless extension candidates. Maximal degree in co-relation 58160. Up to 4419 conditions per place. [2024-06-27 20:37:06,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 146 changer transitions 0/511 dead transitions. [2024-06-27 20:37:06,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 511 transitions, 7984 flow [2024-06-27 20:37:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:37:06,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:37:06,121 INFO L175 Difference]: Start difference. First operand has 347 places, 489 transitions, 5972 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:37:06,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 511 transitions, 7984 flow [2024-06-27 20:37:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 511 transitions, 7808 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 20:37:09,401 INFO L231 Difference]: Finished difference. Result has 348 places, 495 transitions, 6310 flow [2024-06-27 20:37:09,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6310, PETRI_PLACES=348, PETRI_TRANSITIONS=495} [2024-06-27 20:37:09,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 20:37:09,402 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 495 transitions, 6310 flow [2024-06-27 20:37:09,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:09,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:09,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:37:09,402 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:09,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1899505484, now seen corresponding path program 9 times [2024-06-27 20:37:09,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121442450] [2024-06-27 20:37:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:09,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:10,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:10,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121442450] [2024-06-27 20:37:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121442450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:10,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:10,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:10,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047461748] [2024-06-27 20:37:10,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:10,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:10,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:10,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:10,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:10,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:10,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 495 transitions, 6310 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:10,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:10,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:10,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:11,420 INFO L124 PetriNetUnfolderBase]: 3323/5115 cut-off events. [2024-06-27 20:37:11,420 INFO L125 PetriNetUnfolderBase]: For 1427612/1427620 co-relation queries the response was YES. [2024-06-27 20:37:11,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59531 conditions, 5115 events. 3323/5115 cut-off events. For 1427612/1427620 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28194 event pairs, 706 based on Foata normal form. 6/5106 useless extension candidates. Maximal degree in co-relation 59364. Up to 4438 conditions per place. [2024-06-27 20:37:11,490 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 345 selfloop transitions, 169 changer transitions 0/518 dead transitions. [2024-06-27 20:37:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 518 transitions, 8374 flow [2024-06-27 20:37:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:37:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:37:11,491 INFO L175 Difference]: Start difference. First operand has 348 places, 495 transitions, 6310 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:37:11,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 518 transitions, 8374 flow [2024-06-27 20:37:15,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 518 transitions, 7950 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:15,039 INFO L231 Difference]: Finished difference. Result has 351 places, 503 transitions, 6521 flow [2024-06-27 20:37:15,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6521, PETRI_PLACES=351, PETRI_TRANSITIONS=503} [2024-06-27 20:37:15,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 20:37:15,040 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 503 transitions, 6521 flow [2024-06-27 20:37:15,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:15,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:15,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:15,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:37:15,041 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:15,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:15,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2021387406, now seen corresponding path program 10 times [2024-06-27 20:37:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:15,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48624476] [2024-06-27 20:37:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:15,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:15,738 INFO 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 20:37:15,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:15,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48624476] [2024-06-27 20:37:15,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48624476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:15,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:15,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457313933] [2024-06-27 20:37:15,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:15,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:15,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:15,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:15,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 503 transitions, 6521 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:15,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:15,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:15,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:16,954 INFO L124 PetriNetUnfolderBase]: 3317/5107 cut-off events. [2024-06-27 20:37:16,955 INFO L125 PetriNetUnfolderBase]: For 1435870/1435878 co-relation queries the response was YES. [2024-06-27 20:37:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59315 conditions, 5107 events. 3317/5107 cut-off events. For 1435870/1435878 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28171 event pairs, 706 based on Foata normal form. 6/5098 useless extension candidates. Maximal degree in co-relation 59147. Up to 4433 conditions per place. [2024-06-27 20:37:17,036 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 153 changer transitions 0/518 dead transitions. [2024-06-27 20:37:17,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 518 transitions, 8303 flow [2024-06-27 20:37:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:37:17,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:37:17,037 INFO L175 Difference]: Start difference. First operand has 351 places, 503 transitions, 6521 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:37:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 518 transitions, 8303 flow [2024-06-27 20:37:20,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 518 transitions, 7992 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:20,810 INFO L231 Difference]: Finished difference. Result has 356 places, 503 transitions, 6523 flow [2024-06-27 20:37:20,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6523, PETRI_PLACES=356, PETRI_TRANSITIONS=503} [2024-06-27 20:37:20,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:37:20,810 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 503 transitions, 6523 flow [2024-06-27 20:37:20,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:20,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:20,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:20,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:37:20,811 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:20,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1837359800, now seen corresponding path program 1 times [2024-06-27 20:37:20,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:20,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822157584] [2024-06-27 20:37:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:20,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:21,749 INFO 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 20:37:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822157584] [2024-06-27 20:37:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822157584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:21,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:21,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886868194] [2024-06-27 20:37:21,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:21,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:37:21,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 503 transitions, 6523 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:21,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:21,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:37:21,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:23,000 INFO L124 PetriNetUnfolderBase]: 3154/4945 cut-off events. [2024-06-27 20:37:23,000 INFO L125 PetriNetUnfolderBase]: For 1463083/1463085 co-relation queries the response was YES. [2024-06-27 20:37:23,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58849 conditions, 4945 events. 3154/4945 cut-off events. For 1463083/1463085 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27953 event pairs, 634 based on Foata normal form. 2/4944 useless extension candidates. Maximal degree in co-relation 58679. Up to 4437 conditions per place. [2024-06-27 20:37:23,080 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 450 selfloop transitions, 18 changer transitions 0/526 dead transitions. [2024-06-27 20:37:23,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 526 transitions, 7593 flow [2024-06-27 20:37:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:37:23,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:37:23,081 INFO L175 Difference]: Start difference. First operand has 356 places, 503 transitions, 6523 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:37:23,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 526 transitions, 7593 flow [2024-06-27 20:37:26,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 526 transitions, 7235 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:26,762 INFO L231 Difference]: Finished difference. Result has 356 places, 505 transitions, 6284 flow [2024-06-27 20:37:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6284, PETRI_PLACES=356, PETRI_TRANSITIONS=505} [2024-06-27 20:37:26,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:37:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 505 transitions, 6284 flow [2024-06-27 20:37:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:37:26,763 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:26,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 655767652, now seen corresponding path program 2 times [2024-06-27 20:37:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430389727] [2024-06-27 20:37:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:27,795 INFO 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 20:37:27,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:27,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430389727] [2024-06-27 20:37:27,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430389727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:27,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:27,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633326031] [2024-06-27 20:37:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:27,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:27,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:27,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:37:27,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 505 transitions, 6284 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:27,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:27,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:37:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:29,030 INFO L124 PetriNetUnfolderBase]: 3169/4969 cut-off events. [2024-06-27 20:37:29,031 INFO L125 PetriNetUnfolderBase]: For 1500705/1500709 co-relation queries the response was YES. [2024-06-27 20:37:29,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59151 conditions, 4969 events. 3169/4969 cut-off events. For 1500705/1500709 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28118 event pairs, 666 based on Foata normal form. 2/4962 useless extension candidates. Maximal degree in co-relation 58981. Up to 4467 conditions per place. [2024-06-27 20:37:29,114 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 445 selfloop transitions, 22 changer transitions 0/525 dead transitions. [2024-06-27 20:37:29,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 525 transitions, 7354 flow [2024-06-27 20:37:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:37:29,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:37:29,116 INFO L175 Difference]: Start difference. First operand has 356 places, 505 transitions, 6284 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:37:29,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 525 transitions, 7354 flow [2024-06-27 20:37:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 525 transitions, 7247 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:32,655 INFO L231 Difference]: Finished difference. Result has 358 places, 507 transitions, 6309 flow [2024-06-27 20:37:32,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6177, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6309, PETRI_PLACES=358, PETRI_TRANSITIONS=507} [2024-06-27 20:37:32,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:37:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 507 transitions, 6309 flow [2024-06-27 20:37:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:32,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:32,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:37:32,657 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:32,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2021837225, now seen corresponding path program 1 times [2024-06-27 20:37:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:32,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041726461] [2024-06-27 20:37:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:33,583 INFO 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 20:37:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041726461] [2024-06-27 20:37:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041726461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:37:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400707305] [2024-06-27 20:37:33,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:33,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:37:33,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:37:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:37:33,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:33,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 507 transitions, 6309 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:33,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:33,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:33,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:34,889 INFO L124 PetriNetUnfolderBase]: 3258/5065 cut-off events. [2024-06-27 20:37:34,890 INFO L125 PetriNetUnfolderBase]: For 1522854/1522856 co-relation queries the response was YES. [2024-06-27 20:37:34,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59581 conditions, 5065 events. 3258/5065 cut-off events. For 1522854/1522856 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28327 event pairs, 694 based on Foata normal form. 4/5066 useless extension candidates. Maximal degree in co-relation 59410. Up to 4714 conditions per place. [2024-06-27 20:37:34,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 24 changer transitions 0/530 dead transitions. [2024-06-27 20:37:34,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 530 transitions, 7473 flow [2024-06-27 20:37:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:37:34,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 20:37:34,976 INFO L175 Difference]: Start difference. First operand has 358 places, 507 transitions, 6309 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:37:34,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 530 transitions, 7473 flow [2024-06-27 20:37:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 530 transitions, 7359 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:38,596 INFO L231 Difference]: Finished difference. Result has 361 places, 510 transitions, 6331 flow [2024-06-27 20:37:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6331, PETRI_PLACES=361, PETRI_TRANSITIONS=510} [2024-06-27 20:37:38,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-27 20:37:38,597 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 510 transitions, 6331 flow [2024-06-27 20:37:38,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:38,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:38,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:37:38,598 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 655767776, now seen corresponding path program 1 times [2024-06-27 20:37:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168441583] [2024-06-27 20:37:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:39,523 INFO 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 20:37:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168441583] [2024-06-27 20:37:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168441583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:39,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:39,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427021513] [2024-06-27 20:37:39,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:39,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:39,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:39,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:39,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 510 transitions, 6331 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:37:39,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:39,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:39,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:40,825 INFO L124 PetriNetUnfolderBase]: 3255/5060 cut-off events. [2024-06-27 20:37:40,825 INFO L125 PetriNetUnfolderBase]: For 1514546/1514548 co-relation queries the response was YES. [2024-06-27 20:37:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59798 conditions, 5060 events. 3255/5060 cut-off events. For 1514546/1514548 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28275 event pairs, 690 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 59626. Up to 4712 conditions per place. [2024-06-27 20:37:40,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 26 changer transitions 0/528 dead transitions. [2024-06-27 20:37:40,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 528 transitions, 7403 flow [2024-06-27 20:37:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:37:40,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:37:40,907 INFO L175 Difference]: Start difference. First operand has 361 places, 510 transitions, 6331 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:37:40,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 528 transitions, 7403 flow [2024-06-27 20:37:44,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 7257 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:44,622 INFO L231 Difference]: Finished difference. Result has 362 places, 510 transitions, 6247 flow [2024-06-27 20:37:44,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=362, PETRI_TRANSITIONS=510} [2024-06-27 20:37:44,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 20:37:44,622 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 510 transitions, 6247 flow [2024-06-27 20:37:44,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:37:44,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:44,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:44,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:37:44,623 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:44,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 771174142, now seen corresponding path program 3 times [2024-06-27 20:37:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:44,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786214214] [2024-06-27 20:37:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:44,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:45,603 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 20:37:45,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786214214] [2024-06-27 20:37:45,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786214214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:45,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:45,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140337271] [2024-06-27 20:37:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:45,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:45,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:37:45,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 510 transitions, 6247 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:45,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:45,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:37:45,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:46,964 INFO L124 PetriNetUnfolderBase]: 3180/4986 cut-off events. [2024-06-27 20:37:46,965 INFO L125 PetriNetUnfolderBase]: For 1567665/1567671 co-relation queries the response was YES. [2024-06-27 20:37:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59965 conditions, 4986 events. 3180/4986 cut-off events. For 1567665/1567671 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28288 event pairs, 663 based on Foata normal form. 2/4975 useless extension candidates. Maximal degree in co-relation 59792. Up to 4479 conditions per place. [2024-06-27 20:37:47,035 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 443 selfloop transitions, 27 changer transitions 0/528 dead transitions. [2024-06-27 20:37:47,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 528 transitions, 7329 flow [2024-06-27 20:37:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:37:47,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:37:47,037 INFO L175 Difference]: Start difference. First operand has 362 places, 510 transitions, 6247 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:37:47,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 528 transitions, 7329 flow [2024-06-27 20:37:50,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 7241 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:50,854 INFO L231 Difference]: Finished difference. Result has 362 places, 512 transitions, 6306 flow [2024-06-27 20:37:50,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6306, PETRI_PLACES=362, PETRI_TRANSITIONS=512} [2024-06-27 20:37:50,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 20:37:50,855 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 512 transitions, 6306 flow [2024-06-27 20:37:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:50,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:50,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:37:50,855 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:50,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1557557005, now seen corresponding path program 2 times [2024-06-27 20:37:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:50,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821766883] [2024-06-27 20:37:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:51,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821766883] [2024-06-27 20:37:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821766883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:37:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381513516] [2024-06-27 20:37:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:37:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:37:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:37:51,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:51,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 512 transitions, 6306 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:51,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:51,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:51,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:53,106 INFO L124 PetriNetUnfolderBase]: 3373/5231 cut-off events. [2024-06-27 20:37:53,107 INFO L125 PetriNetUnfolderBase]: For 1696776/1696778 co-relation queries the response was YES. [2024-06-27 20:37:53,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63769 conditions, 5231 events. 3373/5231 cut-off events. For 1696776/1696778 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29350 event pairs, 687 based on Foata normal form. 4/5232 useless extension candidates. Maximal degree in co-relation 63595. Up to 4749 conditions per place. [2024-06-27 20:37:53,183 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 52 changer transitions 0/544 dead transitions. [2024-06-27 20:37:53,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 544 transitions, 8228 flow [2024-06-27 20:37:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:37:53,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:37:53,184 INFO L175 Difference]: Start difference. First operand has 362 places, 512 transitions, 6306 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:37:53,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 544 transitions, 8228 flow [2024-06-27 20:37:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 544 transitions, 8097 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:56,561 INFO L231 Difference]: Finished difference. Result has 367 places, 523 transitions, 6620 flow [2024-06-27 20:37:56,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6620, PETRI_PLACES=367, PETRI_TRANSITIONS=523} [2024-06-27 20:37:56,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 20:37:56,562 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 523 transitions, 6620 flow [2024-06-27 20:37:56,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:56,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:56,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:37:56,562 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:56,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash -642486424, now seen corresponding path program 1 times [2024-06-27 20:37:56,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:56,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925922132] [2024-06-27 20:37:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:57,224 INFO 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 20:37:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925922132] [2024-06-27 20:37:57,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925922132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:57,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:57,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:57,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611312184] [2024-06-27 20:37:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:57,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:57,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 523 transitions, 6620 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:37:57,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:57,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:58,631 INFO L124 PetriNetUnfolderBase]: 3359/5213 cut-off events. [2024-06-27 20:37:58,631 INFO L125 PetriNetUnfolderBase]: For 1692395/1692397 co-relation queries the response was YES. [2024-06-27 20:37:58,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63697 conditions, 5213 events. 3359/5213 cut-off events. For 1692395/1692397 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29238 event pairs, 684 based on Foata normal form. 6/5216 useless extension candidates. Maximal degree in co-relation 63520. Up to 4743 conditions per place. [2024-06-27 20:37:58,708 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 464 selfloop transitions, 54 changer transitions 0/543 dead transitions. [2024-06-27 20:37:58,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 543 transitions, 8006 flow [2024-06-27 20:37:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:37:58,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:37:58,710 INFO L175 Difference]: Start difference. First operand has 367 places, 523 transitions, 6620 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:37:58,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 543 transitions, 8006 flow [2024-06-27 20:38:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 543 transitions, 7809 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 20:38:02,481 INFO L231 Difference]: Finished difference. Result has 372 places, 523 transitions, 6540 flow [2024-06-27 20:38:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6540, PETRI_PLACES=372, PETRI_TRANSITIONS=523} [2024-06-27 20:38:02,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 20:38:02,481 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 523 transitions, 6540 flow [2024-06-27 20:38:02,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:02,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:02,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:02,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:38:02,482 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:02,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash -642665914, now seen corresponding path program 2 times [2024-06-27 20:38:02,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643444394] [2024-06-27 20:38:02,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643444394] [2024-06-27 20:38:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643444394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:03,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323388011] [2024-06-27 20:38:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:03,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:03,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 523 transitions, 6540 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:03,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:03,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:03,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:04,465 INFO L124 PetriNetUnfolderBase]: 3358/5214 cut-off events. [2024-06-27 20:38:04,466 INFO L125 PetriNetUnfolderBase]: For 1680677/1680679 co-relation queries the response was YES. [2024-06-27 20:38:04,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63317 conditions, 5214 events. 3358/5214 cut-off events. For 1680677/1680679 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29302 event pairs, 692 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 63138. Up to 4745 conditions per place. [2024-06-27 20:38:04,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 53 changer transitions 0/546 dead transitions. [2024-06-27 20:38:04,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 546 transitions, 8024 flow [2024-06-27 20:38:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:38:04,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:38:04,701 INFO L175 Difference]: Start difference. First operand has 372 places, 523 transitions, 6540 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:38:04,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 546 transitions, 8024 flow [2024-06-27 20:38:08,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 546 transitions, 7908 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:08,518 INFO L231 Difference]: Finished difference. Result has 374 places, 526 transitions, 6628 flow [2024-06-27 20:38:08,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=374, PETRI_TRANSITIONS=526} [2024-06-27 20:38:08,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 20:38:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 526 transitions, 6628 flow [2024-06-27 20:38:08,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:08,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:08,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:08,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:38:08,520 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:08,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1981612184, now seen corresponding path program 3 times [2024-06-27 20:38:08,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:08,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534569607] [2024-06-27 20:38:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:09,343 INFO 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 20:38:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:09,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534569607] [2024-06-27 20:38:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534569607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:09,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:09,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043005340] [2024-06-27 20:38:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:09,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:09,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:09,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 526 transitions, 6628 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:09,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:09,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:09,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:10,675 INFO L124 PetriNetUnfolderBase]: 3414/5294 cut-off events. [2024-06-27 20:38:10,676 INFO L125 PetriNetUnfolderBase]: For 1749630/1749638 co-relation queries the response was YES. [2024-06-27 20:38:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64920 conditions, 5294 events. 3414/5294 cut-off events. For 1749630/1749638 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29744 event pairs, 691 based on Foata normal form. 7/5297 useless extension candidates. Maximal degree in co-relation 64740. Up to 4670 conditions per place. [2024-06-27 20:38:10,764 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 99 changer transitions 0/557 dead transitions. [2024-06-27 20:38:10,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 557 transitions, 8654 flow [2024-06-27 20:38:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:38:10,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:38:10,765 INFO L175 Difference]: Start difference. First operand has 374 places, 526 transitions, 6628 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:38:10,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 557 transitions, 8654 flow [2024-06-27 20:38:15,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 557 transitions, 8512 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:15,318 INFO L231 Difference]: Finished difference. Result has 378 places, 537 transitions, 7019 flow [2024-06-27 20:38:15,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6486, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7019, PETRI_PLACES=378, PETRI_TRANSITIONS=537} [2024-06-27 20:38:15,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 20:38:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 537 transitions, 7019 flow [2024-06-27 20:38:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:15,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:38:15,319 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:15,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1868350432, now seen corresponding path program 4 times [2024-06-27 20:38:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095454264] [2024-06-27 20:38:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:15,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:16,065 INFO 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 20:38:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095454264] [2024-06-27 20:38:16,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095454264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:16,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125597095] [2024-06-27 20:38:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:16,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:16,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 537 transitions, 7019 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:16,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:16,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:16,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:17,552 INFO L124 PetriNetUnfolderBase]: 3484/5399 cut-off events. [2024-06-27 20:38:17,552 INFO L125 PetriNetUnfolderBase]: For 1839692/1839700 co-relation queries the response was YES. [2024-06-27 20:38:17,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67924 conditions, 5399 events. 3484/5399 cut-off events. For 1839692/1839700 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30405 event pairs, 707 based on Foata normal form. 7/5402 useless extension candidates. Maximal degree in co-relation 67742. Up to 4724 conditions per place. [2024-06-27 20:38:17,632 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 97 changer transitions 0/567 dead transitions. [2024-06-27 20:38:17,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 567 transitions, 9291 flow [2024-06-27 20:38:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:38:17,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:38:17,633 INFO L175 Difference]: Start difference. First operand has 378 places, 537 transitions, 7019 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:38:17,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 567 transitions, 9291 flow [2024-06-27 20:38:22,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 567 transitions, 9054 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 20:38:22,340 INFO L231 Difference]: Finished difference. Result has 384 places, 545 transitions, 7240 flow [2024-06-27 20:38:22,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7240, PETRI_PLACES=384, PETRI_TRANSITIONS=545} [2024-06-27 20:38:22,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:38:22,341 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 545 transitions, 7240 flow [2024-06-27 20:38:22,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:22,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:22,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:38:22,342 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:22,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:22,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1868356942, now seen corresponding path program 5 times [2024-06-27 20:38:22,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:22,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607635325] [2024-06-27 20:38:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:23,056 INFO 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 20:38:23,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607635325] [2024-06-27 20:38:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607635325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:23,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:23,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:23,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415446135] [2024-06-27 20:38:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:23,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:23,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 545 transitions, 7240 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:23,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:23,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:24,517 INFO L124 PetriNetUnfolderBase]: 3471/5382 cut-off events. [2024-06-27 20:38:24,517 INFO L125 PetriNetUnfolderBase]: For 1809074/1809082 co-relation queries the response was YES. [2024-06-27 20:38:24,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67036 conditions, 5382 events. 3471/5382 cut-off events. For 1809074/1809082 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30329 event pairs, 700 based on Foata normal form. 5/5383 useless extension candidates. Maximal degree in co-relation 66851. Up to 4718 conditions per place. [2024-06-27 20:38:24,601 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 104 changer transitions 0/568 dead transitions. [2024-06-27 20:38:24,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 568 transitions, 9096 flow [2024-06-27 20:38:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:38:24,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:38:24,602 INFO L175 Difference]: Start difference. First operand has 384 places, 545 transitions, 7240 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:38:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 568 transitions, 9096 flow [2024-06-27 20:38:29,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 568 transitions, 8857 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:29,700 INFO L231 Difference]: Finished difference. Result has 388 places, 548 transitions, 7313 flow [2024-06-27 20:38:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7313, PETRI_PLACES=388, PETRI_TRANSITIONS=548} [2024-06-27 20:38:29,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:38:29,701 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 548 transitions, 7313 flow [2024-06-27 20:38:29,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:29,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:29,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:38:29,701 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:29,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2077173242, now seen corresponding path program 6 times [2024-06-27 20:38:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:29,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425014093] [2024-06-27 20:38:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:29,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:30,434 INFO 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 20:38:30,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:30,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425014093] [2024-06-27 20:38:30,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425014093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:30,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666760300] [2024-06-27 20:38:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:30,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:30,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:30,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 548 transitions, 7313 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:30,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:30,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:30,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:31,920 INFO L124 PetriNetUnfolderBase]: 3528/5464 cut-off events. [2024-06-27 20:38:31,921 INFO L125 PetriNetUnfolderBase]: For 1884995/1885003 co-relation queries the response was YES. [2024-06-27 20:38:31,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68712 conditions, 5464 events. 3528/5464 cut-off events. For 1884995/1885003 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30813 event pairs, 716 based on Foata normal form. 5/5465 useless extension candidates. Maximal degree in co-relation 68526. Up to 4757 conditions per place. [2024-06-27 20:38:32,006 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 452 selfloop transitions, 101 changer transitions 0/578 dead transitions. [2024-06-27 20:38:32,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 578 transitions, 9860 flow [2024-06-27 20:38:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:38:32,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:38:32,008 INFO L175 Difference]: Start difference. First operand has 388 places, 548 transitions, 7313 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:38:32,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 578 transitions, 9860 flow [2024-06-27 20:38:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 578 transitions, 9597 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:36,353 INFO L231 Difference]: Finished difference. Result has 393 places, 556 transitions, 7546 flow [2024-06-27 20:38:36,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7546, PETRI_PLACES=393, PETRI_TRANSITIONS=556} [2024-06-27 20:38:36,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 20:38:36,354 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 556 transitions, 7546 flow [2024-06-27 20:38:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:36,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:36,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:38:36,354 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:36,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2096251582, now seen corresponding path program 7 times [2024-06-27 20:38:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:36,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856868958] [2024-06-27 20:38:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:37,146 INFO 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 20:38:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:37,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856868958] [2024-06-27 20:38:37,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856868958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:37,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:37,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470707572] [2024-06-27 20:38:37,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:37,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:37,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:37,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:37,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 556 transitions, 7546 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:37,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:37,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:37,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:38,706 INFO L124 PetriNetUnfolderBase]: 3514/5446 cut-off events. [2024-06-27 20:38:38,706 INFO L125 PetriNetUnfolderBase]: For 1877126/1877134 co-relation queries the response was YES. [2024-06-27 20:38:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68158 conditions, 5446 events. 3514/5446 cut-off events. For 1877126/1877134 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30730 event pairs, 713 based on Foata normal form. 7/5449 useless extension candidates. Maximal degree in co-relation 67969. Up to 4751 conditions per place. [2024-06-27 20:38:38,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 451 selfloop transitions, 101 changer transitions 0/577 dead transitions. [2024-06-27 20:38:38,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 577 transitions, 9586 flow [2024-06-27 20:38:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:38:38,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:38:38,797 INFO L175 Difference]: Start difference. First operand has 393 places, 556 transitions, 7546 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:38:38,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 577 transitions, 9586 flow [2024-06-27 20:38:44,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 577 transitions, 9137 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:44,233 INFO L231 Difference]: Finished difference. Result has 395 places, 556 transitions, 7308 flow [2024-06-27 20:38:44,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7097, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7308, PETRI_PLACES=395, PETRI_TRANSITIONS=556} [2024-06-27 20:38:44,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 20:38:44,233 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 556 transitions, 7308 flow [2024-06-27 20:38:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:44,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:44,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:44,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:38:44,234 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:44,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2096431072, now seen corresponding path program 8 times [2024-06-27 20:38:44,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:44,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385496509] [2024-06-27 20:38:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:44,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385496509] [2024-06-27 20:38:44,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385496509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:44,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:44,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506744402] [2024-06-27 20:38:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:45,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:45,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 556 transitions, 7308 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:45,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:45,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:45,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:46,346 INFO L124 PetriNetUnfolderBase]: 3502/5430 cut-off events. [2024-06-27 20:38:46,346 INFO L125 PetriNetUnfolderBase]: For 1848024/1848032 co-relation queries the response was YES. [2024-06-27 20:38:46,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66922 conditions, 5430 events. 3502/5430 cut-off events. For 1848024/1848032 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30661 event pairs, 707 based on Foata normal form. 5/5431 useless extension candidates. Maximal degree in co-relation 66733. Up to 4745 conditions per place. [2024-06-27 20:38:46,435 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 114 changer transitions 0/578 dead transitions. [2024-06-27 20:38:46,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 578 transitions, 9158 flow [2024-06-27 20:38:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:38:46,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:38:46,437 INFO L175 Difference]: Start difference. First operand has 395 places, 556 transitions, 7308 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:38:46,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 578 transitions, 9158 flow [2024-06-27 20:38:51,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 578 transitions, 8902 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:38:51,763 INFO L231 Difference]: Finished difference. Result has 396 places, 559 transitions, 7388 flow [2024-06-27 20:38:51,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7058, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7388, PETRI_PLACES=396, PETRI_TRANSITIONS=559} [2024-06-27 20:38:51,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-27 20:38:51,764 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 559 transitions, 7388 flow [2024-06-27 20:38:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:38:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:38:51,765 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:51,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2096436032, now seen corresponding path program 4 times [2024-06-27 20:38:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508940427] [2024-06-27 20:38:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:52,803 INFO 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 20:38:52,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:52,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508940427] [2024-06-27 20:38:52,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508940427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:52,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:52,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205281089] [2024-06-27 20:38:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:52,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:38:52,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 559 transitions, 7388 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:52,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:52,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:38:52,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:54,195 INFO L124 PetriNetUnfolderBase]: 3373/5276 cut-off events. [2024-06-27 20:38:54,195 INFO L125 PetriNetUnfolderBase]: For 1846324/1846344 co-relation queries the response was YES. [2024-06-27 20:38:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66164 conditions, 5276 events. 3373/5276 cut-off events. For 1846324/1846344 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30287 event pairs, 651 based on Foata normal form. 3/5251 useless extension candidates. Maximal degree in co-relation 65974. Up to 4742 conditions per place. [2024-06-27 20:38:54,284 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 482 selfloop transitions, 34 changer transitions 0/574 dead transitions. [2024-06-27 20:38:54,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 574 transitions, 8558 flow [2024-06-27 20:38:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:38:54,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:38:54,285 INFO L175 Difference]: Start difference. First operand has 396 places, 559 transitions, 7388 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:38:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 574 transitions, 8558 flow [2024-06-27 20:38:59,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 574 transitions, 8295 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:59,687 INFO L231 Difference]: Finished difference. Result has 398 places, 561 transitions, 7292 flow [2024-06-27 20:38:59,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7125, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7292, PETRI_PLACES=398, PETRI_TRANSITIONS=561} [2024-06-27 20:38:59,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-27 20:38:59,688 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 561 transitions, 7292 flow [2024-06-27 20:38:59,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:59,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:59,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:38:59,688 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:59,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1981304354, now seen corresponding path program 1 times [2024-06-27 20:38:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:59,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714961281] [2024-06-27 20:38:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:00,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714961281] [2024-06-27 20:39:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714961281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:39:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306365792] [2024-06-27 20:39:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:00,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:39:00,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:39:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:39:00,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:00,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 561 transitions, 7292 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:00,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:00,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:00,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:02,081 INFO L124 PetriNetUnfolderBase]: 3640/5564 cut-off events. [2024-06-27 20:39:02,082 INFO L125 PetriNetUnfolderBase]: For 1845300/1845302 co-relation queries the response was YES. [2024-06-27 20:39:02,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67247 conditions, 5564 events. 3640/5564 cut-off events. For 1845300/1845302 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30719 event pairs, 754 based on Foata normal form. 2/5563 useless extension candidates. Maximal degree in co-relation 67056. Up to 5402 conditions per place. [2024-06-27 20:39:02,176 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 549 selfloop transitions, 23 changer transitions 0/576 dead transitions. [2024-06-27 20:39:02,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 576 transitions, 8580 flow [2024-06-27 20:39:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:39:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:39:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 20:39:02,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380952380952381 [2024-06-27 20:39:02,177 INFO L175 Difference]: Start difference. First operand has 398 places, 561 transitions, 7292 flow. Second operand 10 states and 142 transitions. [2024-06-27 20:39:02,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 576 transitions, 8580 flow [2024-06-27 20:39:07,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 576 transitions, 8429 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:07,224 INFO L231 Difference]: Finished difference. Result has 402 places, 563 transitions, 7308 flow [2024-06-27 20:39:07,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7308, PETRI_PLACES=402, PETRI_TRANSITIONS=563} [2024-06-27 20:39:07,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 20:39:07,224 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 563 transitions, 7308 flow [2024-06-27 20:39:07,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:07,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:07,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:07,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:39:07,225 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:07,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1364910232, now seen corresponding path program 1 times [2024-06-27 20:39:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:07,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110552977] [2024-06-27 20:39:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:07,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:07,918 INFO 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 20:39:07,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:07,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110552977] [2024-06-27 20:39:07,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110552977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:07,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201044360] [2024-06-27 20:39:07,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:07,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:08,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:08,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 563 transitions, 7308 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:08,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:08,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:08,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:09,508 INFO L124 PetriNetUnfolderBase]: 3656/5593 cut-off events. [2024-06-27 20:39:09,508 INFO L125 PetriNetUnfolderBase]: For 1887007/1887017 co-relation queries the response was YES. [2024-06-27 20:39:09,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67696 conditions, 5593 events. 3656/5593 cut-off events. For 1887007/1887017 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30895 event pairs, 529 based on Foata normal form. 12/5601 useless extension candidates. Maximal degree in co-relation 67504. Up to 5221 conditions per place. [2024-06-27 20:39:09,600 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 551 selfloop transitions, 41 changer transitions 0/596 dead transitions. [2024-06-27 20:39:09,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 596 transitions, 8720 flow [2024-06-27 20:39:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:39:09,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:39:09,602 INFO L175 Difference]: Start difference. First operand has 402 places, 563 transitions, 7308 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:39:09,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 596 transitions, 8720 flow [2024-06-27 20:39:14,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 596 transitions, 8569 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:39:14,858 INFO L231 Difference]: Finished difference. Result has 403 places, 566 transitions, 7385 flow [2024-06-27 20:39:14,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7385, PETRI_PLACES=403, PETRI_TRANSITIONS=566} [2024-06-27 20:39:14,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-27 20:39:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 566 transitions, 7385 flow [2024-06-27 20:39:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:14,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:14,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:39:14,859 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:14,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash -722575534, now seen corresponding path program 2 times [2024-06-27 20:39:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:14,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129662212] [2024-06-27 20:39:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:15,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:15,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129662212] [2024-06-27 20:39:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129662212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:15,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:15,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018627476] [2024-06-27 20:39:15,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 566 transitions, 7385 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:15,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:17,141 INFO L124 PetriNetUnfolderBase]: 3672/5617 cut-off events. [2024-06-27 20:39:17,141 INFO L125 PetriNetUnfolderBase]: For 1914303/1914313 co-relation queries the response was YES. [2024-06-27 20:39:17,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68430 conditions, 5617 events. 3672/5617 cut-off events. For 1914303/1914313 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31114 event pairs, 704 based on Foata normal form. 12/5625 useless extension candidates. Maximal degree in co-relation 68237. Up to 5308 conditions per place. [2024-06-27 20:39:17,237 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 547 selfloop transitions, 43 changer transitions 0/594 dead transitions. [2024-06-27 20:39:17,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 594 transitions, 8785 flow [2024-06-27 20:39:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:39:17,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:39:17,239 INFO L175 Difference]: Start difference. First operand has 403 places, 566 transitions, 7385 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:39:17,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 594 transitions, 8785 flow [2024-06-27 20:39:23,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 594 transitions, 8579 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:23,072 INFO L231 Difference]: Finished difference. Result has 405 places, 569 transitions, 7417 flow [2024-06-27 20:39:23,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7179, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7417, PETRI_PLACES=405, PETRI_TRANSITIONS=569} [2024-06-27 20:39:23,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 20:39:23,072 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 569 transitions, 7417 flow [2024-06-27 20:39:23,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:23,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:23,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:23,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:39:23,073 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:23,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1630607512, now seen corresponding path program 3 times [2024-06-27 20:39:23,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:23,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815080753] [2024-06-27 20:39:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:23,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:23,784 INFO 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 20:39:23,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:23,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815080753] [2024-06-27 20:39:23,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815080753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:23,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792980824] [2024-06-27 20:39:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:23,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:23,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 569 transitions, 7417 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:23,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:25,251 INFO L124 PetriNetUnfolderBase]: 3688/5641 cut-off events. [2024-06-27 20:39:25,251 INFO L125 PetriNetUnfolderBase]: For 1943737/1943747 co-relation queries the response was YES. [2024-06-27 20:39:25,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68907 conditions, 5641 events. 3688/5641 cut-off events. For 1943737/1943747 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31301 event pairs, 702 based on Foata normal form. 12/5649 useless extension candidates. Maximal degree in co-relation 68713. Up to 5304 conditions per place. [2024-06-27 20:39:25,353 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 48 changer transitions 0/598 dead transitions. [2024-06-27 20:39:25,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 598 transitions, 8833 flow [2024-06-27 20:39:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:39:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:39:25,355 INFO L175 Difference]: Start difference. First operand has 405 places, 569 transitions, 7417 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:39:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 598 transitions, 8833 flow [2024-06-27 20:39:32,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 598 transitions, 8617 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:32,137 INFO L231 Difference]: Finished difference. Result has 407 places, 572 transitions, 7455 flow [2024-06-27 20:39:32,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7455, PETRI_PLACES=407, PETRI_TRANSITIONS=572} [2024-06-27 20:39:32,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 20:39:32,138 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 572 transitions, 7455 flow [2024-06-27 20:39:32,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:32,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:32,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:39:32,139 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1630945846, now seen corresponding path program 1 times [2024-06-27 20:39:32,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:32,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997108115] [2024-06-27 20:39:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997108115] [2024-06-27 20:39:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997108115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:39:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810618226] [2024-06-27 20:39:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:32,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:39:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:39:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:39:32,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:32,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 572 transitions, 7455 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:32,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:32,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:34,409 INFO L124 PetriNetUnfolderBase]: 3698/5655 cut-off events. [2024-06-27 20:39:34,410 INFO L125 PetriNetUnfolderBase]: For 1950647/1950657 co-relation queries the response was YES. [2024-06-27 20:39:34,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69294 conditions, 5655 events. 3698/5655 cut-off events. For 1950647/1950657 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31355 event pairs, 705 based on Foata normal form. 10/5661 useless extension candidates. Maximal degree in co-relation 69099. Up to 5346 conditions per place. [2024-06-27 20:39:34,513 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 549 selfloop transitions, 48 changer transitions 0/601 dead transitions. [2024-06-27 20:39:34,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 601 transitions, 8911 flow [2024-06-27 20:39:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:39:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:39:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:39:34,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:39:34,515 INFO L175 Difference]: Start difference. First operand has 407 places, 572 transitions, 7455 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:39:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 601 transitions, 8911 flow [2024-06-27 20:39:40,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 601 transitions, 8679 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:40,301 INFO L231 Difference]: Finished difference. Result has 410 places, 576 transitions, 7516 flow [2024-06-27 20:39:40,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7223, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7516, PETRI_PLACES=410, PETRI_TRANSITIONS=576} [2024-06-27 20:39:40,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 20:39:40,301 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 576 transitions, 7516 flow [2024-06-27 20:39:40,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:40,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:40,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:40,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:39:40,302 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:40,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1766843268, now seen corresponding path program 1 times [2024-06-27 20:39:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105340335] [2024-06-27 20:39:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:40,896 INFO 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 20:39:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105340335] [2024-06-27 20:39:40,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105340335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:40,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:40,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033870744] [2024-06-27 20:39:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:40,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:40,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:41,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:39:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 576 transitions, 7516 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:39:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:42,431 INFO L124 PetriNetUnfolderBase]: 3602/5559 cut-off events. [2024-06-27 20:39:42,432 INFO L125 PetriNetUnfolderBase]: For 1980793/1980809 co-relation queries the response was YES. [2024-06-27 20:39:42,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69167 conditions, 5559 events. 3602/5559 cut-off events. For 1980793/1980809 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31295 event pairs, 681 based on Foata normal form. 7/5550 useless extension candidates. Maximal degree in co-relation 68971. Up to 4782 conditions per place. [2024-06-27 20:39:42,532 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 94 changer transitions 0/612 dead transitions. [2024-06-27 20:39:42,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 612 transitions, 8909 flow [2024-06-27 20:39:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:39:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:39:42,533 INFO L175 Difference]: Start difference. First operand has 410 places, 576 transitions, 7516 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:39:42,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 612 transitions, 8909 flow [2024-06-27 20:39:48,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 612 transitions, 8644 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-27 20:39:48,383 INFO L231 Difference]: Finished difference. Result has 411 places, 584 transitions, 7603 flow [2024-06-27 20:39:48,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7251, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7603, PETRI_PLACES=411, PETRI_TRANSITIONS=584} [2024-06-27 20:39:48,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 20:39:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 584 transitions, 7603 flow [2024-06-27 20:39:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:48,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:48,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:39:48,396 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:48,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -589907064, now seen corresponding path program 2 times [2024-06-27 20:39:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255880928] [2024-06-27 20:39:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:49,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255880928] [2024-06-27 20:39:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255880928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:49,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284485674] [2024-06-27 20:39:49,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:49,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:39:49,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 584 transitions, 7603 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:49,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:49,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:39:49,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:50,659 INFO L124 PetriNetUnfolderBase]: 3628/5599 cut-off events. [2024-06-27 20:39:50,659 INFO L125 PetriNetUnfolderBase]: For 2030089/2030105 co-relation queries the response was YES. [2024-06-27 20:39:50,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70401 conditions, 5599 events. 3628/5599 cut-off events. For 2030089/2030105 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31597 event pairs, 682 based on Foata normal form. 7/5590 useless extension candidates. Maximal degree in co-relation 70203. Up to 4775 conditions per place. [2024-06-27 20:39:50,758 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 102 changer transitions 0/616 dead transitions. [2024-06-27 20:39:50,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 616 transitions, 9315 flow [2024-06-27 20:39:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:39:50,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:39:50,760 INFO L175 Difference]: Start difference. First operand has 411 places, 584 transitions, 7603 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:39:50,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 616 transitions, 9315 flow [2024-06-27 20:39:57,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 616 transitions, 9104 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:57,485 INFO L231 Difference]: Finished difference. Result has 415 places, 590 transitions, 7778 flow [2024-06-27 20:39:57,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7392, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7778, PETRI_PLACES=415, PETRI_TRANSITIONS=590} [2024-06-27 20:39:57,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 20:39:57,486 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 590 transitions, 7778 flow [2024-06-27 20:39:57,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:57,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:57,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:39:57,487 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:57,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 737869446, now seen corresponding path program 3 times [2024-06-27 20:39:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882463473] [2024-06-27 20:39:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:57,991 INFO 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 20:39:57,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:57,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882463473] [2024-06-27 20:39:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882463473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:57,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063651688] [2024-06-27 20:39:57,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:57,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:57,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:58,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:39:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 590 transitions, 7778 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:39:58,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:59,516 INFO L124 PetriNetUnfolderBase]: 3638/5607 cut-off events. [2024-06-27 20:39:59,517 INFO L125 PetriNetUnfolderBase]: For 2058778/2058792 co-relation queries the response was YES. [2024-06-27 20:39:59,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70782 conditions, 5607 events. 3638/5607 cut-off events. For 2058778/2058792 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31623 event pairs, 691 based on Foata normal form. 3/5594 useless extension candidates. Maximal degree in co-relation 70583. Up to 4832 conditions per place. [2024-06-27 20:39:59,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 490 selfloop transitions, 93 changer transitions 0/623 dead transitions. [2024-06-27 20:39:59,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 623 transitions, 9211 flow [2024-06-27 20:39:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:39:59,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:39:59,622 INFO L175 Difference]: Start difference. First operand has 415 places, 590 transitions, 7778 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:39:59,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 623 transitions, 9211 flow [2024-06-27 20:40:06,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 623 transitions, 9008 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:06,029 INFO L231 Difference]: Finished difference. Result has 420 places, 598 transitions, 7953 flow [2024-06-27 20:40:06,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7589, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7953, PETRI_PLACES=420, PETRI_TRANSITIONS=598} [2024-06-27 20:40:06,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 20:40:06,030 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 598 transitions, 7953 flow [2024-06-27 20:40:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:06,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:06,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:06,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:40:06,030 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:06,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash -584369627, now seen corresponding path program 1 times [2024-06-27 20:40:06,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:06,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038741772] [2024-06-27 20:40:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:06,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:06,955 INFO 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 20:40:06,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038741772] [2024-06-27 20:40:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038741772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117651751] [2024-06-27 20:40:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:07,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:07,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 598 transitions, 7953 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:40:07,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:07,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:07,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:08,715 INFO L124 PetriNetUnfolderBase]: 3632/5598 cut-off events. [2024-06-27 20:40:08,715 INFO L125 PetriNetUnfolderBase]: For 2065807/2065821 co-relation queries the response was YES. [2024-06-27 20:40:08,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71094 conditions, 5598 events. 3632/5598 cut-off events. For 2065807/2065821 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31570 event pairs, 667 based on Foata normal form. 3/5585 useless extension candidates. Maximal degree in co-relation 70892. Up to 4798 conditions per place. [2024-06-27 20:40:08,807 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 99 changer transitions 0/623 dead transitions. [2024-06-27 20:40:08,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 623 transitions, 9221 flow [2024-06-27 20:40:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:40:08,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:40:08,809 INFO L175 Difference]: Start difference. First operand has 420 places, 598 transitions, 7953 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:40:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 623 transitions, 9221 flow [2024-06-27 20:40:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 623 transitions, 8992 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:15,022 INFO L231 Difference]: Finished difference. Result has 424 places, 598 transitions, 7938 flow [2024-06-27 20:40:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7938, PETRI_PLACES=424, PETRI_TRANSITIONS=598} [2024-06-27 20:40:15,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 20:40:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 598 transitions, 7938 flow [2024-06-27 20:40:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:40:15,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:15,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:15,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:40:15,023 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:15,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash 738168348, now seen corresponding path program 1 times [2024-06-27 20:40:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566080032] [2024-06-27 20:40:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:15,616 INFO 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 20:40:15,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:15,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566080032] [2024-06-27 20:40:15,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566080032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:15,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041494891] [2024-06-27 20:40:15,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:15,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:40:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 598 transitions, 7938 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:15,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:40:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:17,324 INFO L124 PetriNetUnfolderBase]: 3758/5734 cut-off events. [2024-06-27 20:40:17,324 INFO L125 PetriNetUnfolderBase]: For 2114455/2114463 co-relation queries the response was YES. [2024-06-27 20:40:17,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72124 conditions, 5734 events. 3758/5734 cut-off events. For 2114455/2114463 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 31844 event pairs, 712 based on Foata normal form. 5/5735 useless extension candidates. Maximal degree in co-relation 71921. Up to 5114 conditions per place. [2024-06-27 20:40:17,422 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 525 selfloop transitions, 100 changer transitions 0/629 dead transitions. [2024-06-27 20:40:17,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 629 transitions, 9434 flow [2024-06-27 20:40:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:40:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:40:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:40:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:40:17,423 INFO L175 Difference]: Start difference. First operand has 424 places, 598 transitions, 7938 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:40:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 629 transitions, 9434 flow [2024-06-27 20:40:23,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 629 transitions, 9221 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:23,493 INFO L231 Difference]: Finished difference. Result has 426 places, 602 transitions, 8068 flow [2024-06-27 20:40:23,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7725, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8068, PETRI_PLACES=426, PETRI_TRANSITIONS=602} [2024-06-27 20:40:23,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 20:40:23,494 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 602 transitions, 8068 flow [2024-06-27 20:40:23,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:23,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:23,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:23,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:40:23,494 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:23,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:23,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1772504178, now seen corresponding path program 4 times [2024-06-27 20:40:23,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:23,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994810489] [2024-06-27 20:40:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:24,054 INFO 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 20:40:24,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:24,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994810489] [2024-06-27 20:40:24,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994810489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580629462] [2024-06-27 20:40:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:24,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:24,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 602 transitions, 8068 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:24,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:24,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:25,663 INFO L124 PetriNetUnfolderBase]: 3672/5661 cut-off events. [2024-06-27 20:40:25,663 INFO L125 PetriNetUnfolderBase]: For 2150482/2150500 co-relation queries the response was YES. [2024-06-27 20:40:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72858 conditions, 5661 events. 3672/5661 cut-off events. For 2150482/2150500 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32037 event pairs, 686 based on Foata normal form. 3/5638 useless extension candidates. Maximal degree in co-relation 72654. Up to 4824 conditions per place. [2024-06-27 20:40:25,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 103 changer transitions 0/627 dead transitions. [2024-06-27 20:40:25,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 627 transitions, 9431 flow [2024-06-27 20:40:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:40:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:40:25,777 INFO L175 Difference]: Start difference. First operand has 426 places, 602 transitions, 8068 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:40:25,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 627 transitions, 9431 flow [2024-06-27 20:40:32,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 627 transitions, 9069 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-27 20:40:32,879 INFO L231 Difference]: Finished difference. Result has 426 places, 605 transitions, 8016 flow [2024-06-27 20:40:32,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7706, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8016, PETRI_PLACES=426, PETRI_TRANSITIONS=605} [2024-06-27 20:40:32,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 20:40:32,880 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 605 transitions, 8016 flow [2024-06-27 20:40:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:32,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:32,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:32,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:40:32,881 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:32,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:32,881 INFO L85 PathProgramCache]: Analyzing trace with hash 741881466, now seen corresponding path program 5 times [2024-06-27 20:40:32,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:32,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508637266] [2024-06-27 20:40:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:33,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508637266] [2024-06-27 20:40:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508637266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:33,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276932515] [2024-06-27 20:40:33,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:33,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:33,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:33,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 605 transitions, 8016 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:33,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:33,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:35,100 INFO L124 PetriNetUnfolderBase]: 3682/5676 cut-off events. [2024-06-27 20:40:35,101 INFO L125 PetriNetUnfolderBase]: For 2181812/2181830 co-relation queries the response was YES. [2024-06-27 20:40:35,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72864 conditions, 5676 events. 3682/5676 cut-off events. For 2181812/2181830 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32097 event pairs, 712 based on Foata normal form. 3/5653 useless extension candidates. Maximal degree in co-relation 72660. Up to 4661 conditions per place. [2024-06-27 20:40:35,209 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 144 changer transitions 0/629 dead transitions. [2024-06-27 20:40:35,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 629 transitions, 9975 flow [2024-06-27 20:40:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:40:35,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:40:35,210 INFO L175 Difference]: Start difference. First operand has 426 places, 605 transitions, 8016 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:40:35,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 629 transitions, 9975 flow [2024-06-27 20:40:42,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 629 transitions, 9698 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:42,585 INFO L231 Difference]: Finished difference. Result has 428 places, 608 transitions, 8130 flow [2024-06-27 20:40:42,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7739, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8130, PETRI_PLACES=428, PETRI_TRANSITIONS=608} [2024-06-27 20:40:42,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 20:40:42,586 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 608 transitions, 8130 flow [2024-06-27 20:40:42,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:42,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:42,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:42,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:40:42,587 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:42,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:42,587 INFO L85 PathProgramCache]: Analyzing trace with hash 741892998, now seen corresponding path program 2 times [2024-06-27 20:40:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:42,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362672630] [2024-06-27 20:40:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:43,219 INFO 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 20:40:43,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:43,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362672630] [2024-06-27 20:40:43,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362672630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:43,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:43,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668950557] [2024-06-27 20:40:43,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:43,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:43,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:43,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:43,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:40:43,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 608 transitions, 8130 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:43,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:43,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:40:43,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:44,861 INFO L124 PetriNetUnfolderBase]: 3830/5838 cut-off events. [2024-06-27 20:40:44,861 INFO L125 PetriNetUnfolderBase]: For 2253828/2253836 co-relation queries the response was YES. [2024-06-27 20:40:44,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74697 conditions, 5838 events. 3830/5838 cut-off events. For 2253828/2253836 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32503 event pairs, 719 based on Foata normal form. 5/5839 useless extension candidates. Maximal degree in co-relation 74492. Up to 5130 conditions per place. [2024-06-27 20:40:44,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 120 changer transitions 0/641 dead transitions. [2024-06-27 20:40:44,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 641 transitions, 10084 flow [2024-06-27 20:40:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:40:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:40:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:40:44,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:40:44,970 INFO L175 Difference]: Start difference. First operand has 428 places, 608 transitions, 8130 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:40:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 641 transitions, 10084 flow [2024-06-27 20:40:52,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 641 transitions, 9408 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 20:40:52,774 INFO L231 Difference]: Finished difference. Result has 428 places, 616 transitions, 7977 flow [2024-06-27 20:40:52,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7454, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7977, PETRI_PLACES=428, PETRI_TRANSITIONS=616} [2024-06-27 20:40:52,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 20:40:52,775 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 616 transitions, 7977 flow [2024-06-27 20:40:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:52,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:52,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:40:52,775 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:52,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1776223620, now seen corresponding path program 3 times [2024-06-27 20:40:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:52,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995019374] [2024-06-27 20:40:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:53,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:53,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995019374] [2024-06-27 20:40:53,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995019374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:53,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:53,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:40:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295016702] [2024-06-27 20:40:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:40:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:40:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:40:53,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:40:53,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 616 transitions, 7977 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:53,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:53,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:40:53,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:55,118 INFO L124 PetriNetUnfolderBase]: 3834/5844 cut-off events. [2024-06-27 20:40:55,118 INFO L125 PetriNetUnfolderBase]: For 2263695/2263703 co-relation queries the response was YES. [2024-06-27 20:40:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74010 conditions, 5844 events. 3834/5844 cut-off events. For 2263695/2263703 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32520 event pairs, 731 based on Foata normal form. 5/5845 useless extension candidates. Maximal degree in co-relation 73807. Up to 5138 conditions per place. [2024-06-27 20:40:55,227 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 122 changer transitions 0/645 dead transitions. [2024-06-27 20:40:55,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 645 transitions, 9815 flow [2024-06-27 20:40:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:40:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:40:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:40:55,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:40:55,229 INFO L175 Difference]: Start difference. First operand has 428 places, 616 transitions, 7977 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:40:55,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 645 transitions, 9815 flow [2024-06-27 20:41:02,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 645 transitions, 9480 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:02,875 INFO L231 Difference]: Finished difference. Result has 432 places, 620 transitions, 8035 flow [2024-06-27 20:41:02,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7682, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8035, PETRI_PLACES=432, PETRI_TRANSITIONS=620} [2024-06-27 20:41:02,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 20:41:02,876 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 620 transitions, 8035 flow [2024-06-27 20:41:02,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:02,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:02,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:02,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:41:02,877 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:02,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1776223248, now seen corresponding path program 6 times [2024-06-27 20:41:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423312967] [2024-06-27 20:41:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:03,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:03,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423312967] [2024-06-27 20:41:03,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423312967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:03,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:03,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548970157] [2024-06-27 20:41:03,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:03,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:41:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 620 transitions, 8035 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:03,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:03,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:41:03,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:05,120 INFO L124 PetriNetUnfolderBase]: 3736/5759 cut-off events. [2024-06-27 20:41:05,120 INFO L125 PetriNetUnfolderBase]: For 2298799/2298817 co-relation queries the response was YES. [2024-06-27 20:41:05,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74046 conditions, 5759 events. 3736/5759 cut-off events. For 2298799/2298817 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32685 event pairs, 708 based on Foata normal form. 3/5736 useless extension candidates. Maximal degree in co-relation 73841. Up to 4727 conditions per place. [2024-06-27 20:41:05,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 141 changer transitions 0/643 dead transitions. [2024-06-27 20:41:05,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 643 transitions, 9712 flow [2024-06-27 20:41:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:41:05,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:41:05,230 INFO L175 Difference]: Start difference. First operand has 432 places, 620 transitions, 8035 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:41:05,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 643 transitions, 9712 flow [2024-06-27 20:41:13,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 643 transitions, 9417 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:13,897 INFO L231 Difference]: Finished difference. Result has 434 places, 623 transitions, 8111 flow [2024-06-27 20:41:13,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7740, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8111, PETRI_PLACES=434, PETRI_TRANSITIONS=623} [2024-06-27 20:41:13,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 20:41:13,898 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 623 transitions, 8111 flow [2024-06-27 20:41:13,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:13,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:13,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:13,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:41:13,899 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:13,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:13,899 INFO L85 PathProgramCache]: Analyzing trace with hash 741893215, now seen corresponding path program 1 times [2024-06-27 20:41:13,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:13,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781661730] [2024-06-27 20:41:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:13,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:14,507 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 20:41:14,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:14,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781661730] [2024-06-27 20:41:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781661730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:14,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:14,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452780263] [2024-06-27 20:41:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:14,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:14,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:41:14,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 623 transitions, 8111 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:14,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:14,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:41:14,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:16,262 INFO L124 PetriNetUnfolderBase]: 3854/5879 cut-off events. [2024-06-27 20:41:16,263 INFO L125 PetriNetUnfolderBase]: For 2297549/2297557 co-relation queries the response was YES. [2024-06-27 20:41:16,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74561 conditions, 5879 events. 3854/5879 cut-off events. For 2297549/2297557 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32808 event pairs, 707 based on Foata normal form. 6/5881 useless extension candidates. Maximal degree in co-relation 74355. Up to 5566 conditions per place. [2024-06-27 20:41:16,381 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 44 changer transitions 0/648 dead transitions. [2024-06-27 20:41:16,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 648 transitions, 9570 flow [2024-06-27 20:41:16,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:41:16,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 20:41:16,383 INFO L175 Difference]: Start difference. First operand has 434 places, 623 transitions, 8111 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:41:16,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 648 transitions, 9570 flow [2024-06-27 20:41:23,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 648 transitions, 9303 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:23,796 INFO L231 Difference]: Finished difference. Result has 438 places, 627 transitions, 8052 flow [2024-06-27 20:41:23,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7844, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8052, PETRI_PLACES=438, PETRI_TRANSITIONS=627} [2024-06-27 20:41:23,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 20:41:23,796 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 627 transitions, 8052 flow [2024-06-27 20:41:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:23,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:23,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:41:23,797 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:23,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -408154787, now seen corresponding path program 2 times [2024-06-27 20:41:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:23,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530959866] [2024-06-27 20:41:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:23,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:24,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:24,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530959866] [2024-06-27 20:41:24,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530959866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:24,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:24,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:24,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101216807] [2024-06-27 20:41:24,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:24,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:24,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:41:24,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 627 transitions, 8052 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:24,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:24,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:41:24,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:26,181 INFO L124 PetriNetUnfolderBase]: 3880/5915 cut-off events. [2024-06-27 20:41:26,181 INFO L125 PetriNetUnfolderBase]: For 2349783/2349791 co-relation queries the response was YES. [2024-06-27 20:41:26,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75188 conditions, 5915 events. 3880/5915 cut-off events. For 2349783/2349791 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32947 event pairs, 705 based on Foata normal form. 6/5917 useless extension candidates. Maximal degree in co-relation 74981. Up to 5453 conditions per place. [2024-06-27 20:41:26,288 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 92 changer transitions 0/654 dead transitions. [2024-06-27 20:41:26,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 654 transitions, 10236 flow [2024-06-27 20:41:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:41:26,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:41:26,290 INFO L175 Difference]: Start difference. First operand has 438 places, 627 transitions, 8052 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:41:26,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 654 transitions, 10236 flow [2024-06-27 20:41:34,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 654 transitions, 10095 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:34,920 INFO L231 Difference]: Finished difference. Result has 440 places, 635 transitions, 8330 flow [2024-06-27 20:41:34,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7911, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8330, PETRI_PLACES=440, PETRI_TRANSITIONS=635} [2024-06-27 20:41:34,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-27 20:41:34,934 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 635 transitions, 8330 flow [2024-06-27 20:41:34,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:34,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:34,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:41:34,935 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:34,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 615670532, now seen corresponding path program 4 times [2024-06-27 20:41:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268304671] [2024-06-27 20:41:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:35,694 INFO 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 20:41:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268304671] [2024-06-27 20:41:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268304671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:35,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:35,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:35,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228697926] [2024-06-27 20:41:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:35,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:41:35,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 635 transitions, 8330 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:35,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:35,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:41:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:37,436 INFO L124 PetriNetUnfolderBase]: 3932/5991 cut-off events. [2024-06-27 20:41:37,437 INFO L125 PetriNetUnfolderBase]: For 2449323/2449331 co-relation queries the response was YES. [2024-06-27 20:41:37,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77088 conditions, 5991 events. 3932/5991 cut-off events. For 2449323/2449331 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33414 event pairs, 752 based on Foata normal form. 5/5992 useless extension candidates. Maximal degree in co-relation 76880. Up to 4929 conditions per place. [2024-06-27 20:41:37,552 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 172 changer transitions 0/665 dead transitions. [2024-06-27 20:41:37,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 665 transitions, 10648 flow [2024-06-27 20:41:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:41:37,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:41:37,554 INFO L175 Difference]: Start difference. First operand has 440 places, 635 transitions, 8330 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:41:37,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 665 transitions, 10648 flow [2024-06-27 20:41:45,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 665 transitions, 10464 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:45,484 INFO L231 Difference]: Finished difference. Result has 444 places, 642 transitions, 8737 flow [2024-06-27 20:41:45,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8737, PETRI_PLACES=444, PETRI_TRANSITIONS=642} [2024-06-27 20:41:45,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 20:41:45,485 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 642 transitions, 8737 flow [2024-06-27 20:41:45,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:45,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:45,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:41:45,485 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:45,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash 131638021, now seen corresponding path program 3 times [2024-06-27 20:41:45,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:45,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310608055] [2024-06-27 20:41:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310608055] [2024-06-27 20:41:46,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310608055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:46,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:46,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474988169] [2024-06-27 20:41:46,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:46,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:46,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:41:46,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 642 transitions, 8737 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:46,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:46,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:41:46,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:47,807 INFO L124 PetriNetUnfolderBase]: 3926/5983 cut-off events. [2024-06-27 20:41:47,807 INFO L125 PetriNetUnfolderBase]: For 2439898/2439906 co-relation queries the response was YES. [2024-06-27 20:41:47,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77706 conditions, 5983 events. 3926/5983 cut-off events. For 2439898/2439906 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33378 event pairs, 711 based on Foata normal form. 6/5985 useless extension candidates. Maximal degree in co-relation 77497. Up to 5520 conditions per place. [2024-06-27 20:41:47,928 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 563 selfloop transitions, 93 changer transitions 0/660 dead transitions. [2024-06-27 20:41:47,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 660 transitions, 10407 flow [2024-06-27 20:41:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:41:47,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:41:47,929 INFO L175 Difference]: Start difference. First operand has 444 places, 642 transitions, 8737 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:41:47,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 660 transitions, 10407 flow [2024-06-27 20:41:56,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 660 transitions, 10013 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:56,342 INFO L231 Difference]: Finished difference. Result has 448 places, 642 transitions, 8540 flow [2024-06-27 20:41:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8540, PETRI_PLACES=448, PETRI_TRANSITIONS=642} [2024-06-27 20:41:56,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-27 20:41:56,342 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 642 transitions, 8540 flow [2024-06-27 20:41:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:56,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:41:56,343 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:41:56,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash -415506654, now seen corresponding path program 5 times [2024-06-27 20:41:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115501133] [2024-06-27 20:41:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:57,006 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 20:41:57,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:57,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115501133] [2024-06-27 20:41:57,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115501133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:57,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:57,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:57,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988811371] [2024-06-27 20:41:57,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:57,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:57,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:57,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:41:57,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 642 transitions, 8540 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:57,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:57,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:41:57,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:58,909 INFO L124 PetriNetUnfolderBase]: 3978/6055 cut-off events. [2024-06-27 20:41:58,909 INFO L125 PetriNetUnfolderBase]: For 2536416/2536424 co-relation queries the response was YES. [2024-06-27 20:41:58,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79233 conditions, 6055 events. 3978/6055 cut-off events. For 2536416/2536424 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 33755 event pairs, 760 based on Foata normal form. 5/6056 useless extension candidates. Maximal degree in co-relation 79022. Up to 4961 conditions per place. [2024-06-27 20:41:59,009 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 504 selfloop transitions, 166 changer transitions 0/674 dead transitions. [2024-06-27 20:41:59,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 674 transitions, 10932 flow [2024-06-27 20:41:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:41:59,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:41:59,016 INFO L175 Difference]: Start difference. First operand has 448 places, 642 transitions, 8540 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:41:59,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 674 transitions, 10932 flow [2024-06-27 20:42:06,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 674 transitions, 10774 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:06,735 INFO L231 Difference]: Finished difference. Result has 451 places, 650 transitions, 8999 flow [2024-06-27 20:42:06,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8999, PETRI_PLACES=451, PETRI_TRANSITIONS=650} [2024-06-27 20:42:06,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-27 20:42:06,736 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 650 transitions, 8999 flow [2024-06-27 20:42:06,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:06,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:06,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:06,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:42:06,737 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:06,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1938003039, now seen corresponding path program 4 times [2024-06-27 20:42:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093579837] [2024-06-27 20:42:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:07,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:07,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093579837] [2024-06-27 20:42:07,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093579837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:07,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:07,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977683600] [2024-06-27 20:42:07,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:07,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:07,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:07,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 650 transitions, 8999 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:07,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:07,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:09,051 INFO L124 PetriNetUnfolderBase]: 3980/6058 cut-off events. [2024-06-27 20:42:09,051 INFO L125 PetriNetUnfolderBase]: For 2537727/2537735 co-relation queries the response was YES. [2024-06-27 20:42:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79953 conditions, 6058 events. 3980/6058 cut-off events. For 2537727/2537735 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33788 event pairs, 714 based on Foata normal form. 6/6060 useless extension candidates. Maximal degree in co-relation 79740. Up to 5593 conditions per place. [2024-06-27 20:42:09,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 572 selfloop transitions, 95 changer transitions 0/671 dead transitions. [2024-06-27 20:42:09,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 671 transitions, 10791 flow [2024-06-27 20:42:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:42:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:42:09,165 INFO L175 Difference]: Start difference. First operand has 451 places, 650 transitions, 8999 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:42:09,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 671 transitions, 10791 flow [2024-06-27 20:42:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 671 transitions, 10427 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 20:42:17,925 INFO L231 Difference]: Finished difference. Result has 455 places, 653 transitions, 8930 flow [2024-06-27 20:42:17,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8635, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8930, PETRI_PLACES=455, PETRI_TRANSITIONS=653} [2024-06-27 20:42:17,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-27 20:42:17,925 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 653 transitions, 8930 flow [2024-06-27 20:42:17,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:17,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:17,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:17,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:42:17,926 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:17,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 615463142, now seen corresponding path program 6 times [2024-06-27 20:42:17,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758506448] [2024-06-27 20:42:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:18,581 INFO 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 20:42:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758506448] [2024-06-27 20:42:18,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758506448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:18,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:18,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:18,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069707653] [2024-06-27 20:42:18,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:18,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 653 transitions, 8930 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:18,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:18,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:20,346 INFO L124 PetriNetUnfolderBase]: 3968/6042 cut-off events. [2024-06-27 20:42:20,346 INFO L125 PetriNetUnfolderBase]: For 2541401/2541409 co-relation queries the response was YES. [2024-06-27 20:42:20,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78790 conditions, 6042 events. 3968/6042 cut-off events. For 2541401/2541409 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33720 event pairs, 760 based on Foata normal form. 5/6043 useless extension candidates. Maximal degree in co-relation 78576. Up to 4956 conditions per place. [2024-06-27 20:42:20,472 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 504 selfloop transitions, 167 changer transitions 0/675 dead transitions. [2024-06-27 20:42:20,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 675 transitions, 10744 flow [2024-06-27 20:42:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:42:20,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:42:20,474 INFO L175 Difference]: Start difference. First operand has 455 places, 653 transitions, 8930 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:42:20,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 675 transitions, 10744 flow [2024-06-27 20:42:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 675 transitions, 10474 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:28,480 INFO L231 Difference]: Finished difference. Result has 458 places, 653 transitions, 9001 flow [2024-06-27 20:42:28,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9001, PETRI_PLACES=458, PETRI_TRANSITIONS=653} [2024-06-27 20:42:28,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 20:42:28,481 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 653 transitions, 9001 flow [2024-06-27 20:42:28,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:28,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:28,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:28,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:42:28,481 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:28,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:28,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1934506580, now seen corresponding path program 4 times [2024-06-27 20:42:28,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:28,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783802927] [2024-06-27 20:42:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:28,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:29,173 INFO 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 20:42:29,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783802927] [2024-06-27 20:42:29,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783802927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:29,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:29,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297176131] [2024-06-27 20:42:29,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:29,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:29,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:29,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 653 transitions, 9001 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:29,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:29,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:29,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:30,924 INFO L124 PetriNetUnfolderBase]: 3984/6066 cut-off events. [2024-06-27 20:42:30,924 INFO L125 PetriNetUnfolderBase]: For 2576960/2576968 co-relation queries the response was YES. [2024-06-27 20:42:31,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79514 conditions, 6066 events. 3984/6066 cut-off events. For 2576960/2576968 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33917 event pairs, 712 based on Foata normal form. 8/6070 useless extension candidates. Maximal degree in co-relation 79299. Up to 5659 conditions per place. [2024-06-27 20:42:31,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 598 selfloop transitions, 72 changer transitions 0/674 dead transitions. [2024-06-27 20:42:31,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 674 transitions, 10555 flow [2024-06-27 20:42:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:42:31,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 20:42:31,036 INFO L175 Difference]: Start difference. First operand has 458 places, 653 transitions, 9001 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:42:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 674 transitions, 10555 flow [2024-06-27 20:42:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 674 transitions, 10206 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:40,462 INFO L231 Difference]: Finished difference. Result has 459 places, 656 transitions, 8970 flow [2024-06-27 20:42:40,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8652, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8970, PETRI_PLACES=459, PETRI_TRANSITIONS=656} [2024-06-27 20:42:40,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 20:42:40,463 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 656 transitions, 8970 flow [2024-06-27 20:42:40,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:40,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:40,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:42:40,463 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1934180150, now seen corresponding path program 5 times [2024-06-27 20:42:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666177185] [2024-06-27 20:42:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:41,224 INFO 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 20:42:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666177185] [2024-06-27 20:42:41,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666177185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:41,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084321093] [2024-06-27 20:42:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:41,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:41,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 656 transitions, 8970 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:41,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:41,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:41,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:42,972 INFO L124 PetriNetUnfolderBase]: 4026/6130 cut-off events. [2024-06-27 20:42:42,973 INFO L125 PetriNetUnfolderBase]: For 2668216/2668224 co-relation queries the response was YES. [2024-06-27 20:42:43,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81236 conditions, 6130 events. 4026/6130 cut-off events. For 2668216/2668224 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34274 event pairs, 714 based on Foata normal form. 8/6134 useless extension candidates. Maximal degree in co-relation 81020. Up to 5675 conditions per place. [2024-06-27 20:42:43,094 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 598 selfloop transitions, 80 changer transitions 0/682 dead transitions. [2024-06-27 20:42:43,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 682 transitions, 11034 flow [2024-06-27 20:42:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:42:43,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 20:42:43,096 INFO L175 Difference]: Start difference. First operand has 459 places, 656 transitions, 8970 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:42:43,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 682 transitions, 11034 flow [2024-06-27 20:42:51,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 682 transitions, 10738 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:51,116 INFO L231 Difference]: Finished difference. Result has 461 places, 662 transitions, 9182 flow [2024-06-27 20:42:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8674, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9182, PETRI_PLACES=461, PETRI_TRANSITIONS=662} [2024-06-27 20:42:51,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 20:42:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 662 transitions, 9182 flow [2024-06-27 20:42:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:42:51,117 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:42:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1184801970, now seen corresponding path program 6 times [2024-06-27 20:42:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950927842] [2024-06-27 20:42:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:51,926 INFO 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 20:42:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950927842] [2024-06-27 20:42:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950927842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:51,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:51,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098301849] [2024-06-27 20:42:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:51,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:42:51,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 662 transitions, 9182 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:51,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:51,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:42:51,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:53,873 INFO L124 PetriNetUnfolderBase]: 4016/6116 cut-off events. [2024-06-27 20:42:53,873 INFO L125 PetriNetUnfolderBase]: For 2649471/2649479 co-relation queries the response was YES. [2024-06-27 20:42:53,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80472 conditions, 6116 events. 4016/6116 cut-off events. For 2649471/2649479 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34279 event pairs, 716 based on Foata normal form. 8/6120 useless extension candidates. Maximal degree in co-relation 80255. Up to 5707 conditions per place. [2024-06-27 20:42:53,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 71 changer transitions 0/680 dead transitions. [2024-06-27 20:42:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 680 transitions, 10586 flow [2024-06-27 20:42:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:42:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:42:53,983 INFO L175 Difference]: Start difference. First operand has 461 places, 662 transitions, 9182 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:42:53,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 680 transitions, 10586 flow [2024-06-27 20:43:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 680 transitions, 10179 flow, removed 157 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:02,301 INFO L231 Difference]: Finished difference. Result has 465 places, 662 transitions, 8923 flow [2024-06-27 20:43:02,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8775, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8923, PETRI_PLACES=465, PETRI_TRANSITIONS=662} [2024-06-27 20:43:02,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-27 20:43:02,302 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 662 transitions, 8923 flow [2024-06-27 20:43:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:43:02,302 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:02,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1945631054, now seen corresponding path program 2 times [2024-06-27 20:43:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524199773] [2024-06-27 20:43:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:03,040 INFO 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 20:43:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524199773] [2024-06-27 20:43:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524199773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:03,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:03,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645408063] [2024-06-27 20:43:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:03,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:03,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:03,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 662 transitions, 8923 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:03,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:05,047 INFO L124 PetriNetUnfolderBase]: 4052/6169 cut-off events. [2024-06-27 20:43:05,057 INFO L125 PetriNetUnfolderBase]: For 2693141/2693149 co-relation queries the response was YES. [2024-06-27 20:43:05,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81657 conditions, 6169 events. 4052/6169 cut-off events. For 2693141/2693149 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34623 event pairs, 711 based on Foata normal form. 6/6171 useless extension candidates. Maximal degree in co-relation 81438. Up to 5636 conditions per place. [2024-06-27 20:43:05,219 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 585 selfloop transitions, 102 changer transitions 0/691 dead transitions. [2024-06-27 20:43:05,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 691 transitions, 11459 flow [2024-06-27 20:43:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:43:05,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:43:05,220 INFO L175 Difference]: Start difference. First operand has 465 places, 662 transitions, 8923 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:43:05,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 691 transitions, 11459 flow [2024-06-27 20:43:14,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 691 transitions, 11299 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:14,093 INFO L231 Difference]: Finished difference. Result has 468 places, 670 transitions, 9395 flow [2024-06-27 20:43:14,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8763, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9395, PETRI_PLACES=468, PETRI_TRANSITIONS=670} [2024-06-27 20:43:14,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-27 20:43:14,094 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 670 transitions, 9395 flow [2024-06-27 20:43:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:14,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:14,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:43:14,095 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1934518484, now seen corresponding path program 3 times [2024-06-27 20:43:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:14,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437094541] [2024-06-27 20:43:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:14,819 INFO 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 20:43:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437094541] [2024-06-27 20:43:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437094541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:14,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:14,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:14,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36100473] [2024-06-27 20:43:14,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:14,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:14,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:14,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:14,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 670 transitions, 9395 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:14,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:14,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:14,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:16,799 INFO L124 PetriNetUnfolderBase]: 4070/6194 cut-off events. [2024-06-27 20:43:16,799 INFO L125 PetriNetUnfolderBase]: For 2750801/2750809 co-relation queries the response was YES. [2024-06-27 20:43:17,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83180 conditions, 6194 events. 4070/6194 cut-off events. For 2750801/2750809 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34744 event pairs, 715 based on Foata normal form. 6/6196 useless extension candidates. Maximal degree in co-relation 82959. Up to 5655 conditions per place. [2024-06-27 20:43:17,055 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 584 selfloop transitions, 110 changer transitions 0/698 dead transitions. [2024-06-27 20:43:17,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 698 transitions, 11913 flow [2024-06-27 20:43:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 20:43:17,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:43:17,057 INFO L175 Difference]: Start difference. First operand has 468 places, 670 transitions, 9395 flow. Second operand 10 states and 165 transitions. [2024-06-27 20:43:17,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 698 transitions, 11913 flow [2024-06-27 20:43:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 698 transitions, 11465 flow, removed 166 selfloop flow, removed 6 redundant places. [2024-06-27 20:43:25,396 INFO L231 Difference]: Finished difference. Result has 472 places, 678 transitions, 9606 flow [2024-06-27 20:43:25,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9606, PETRI_PLACES=472, PETRI_TRANSITIONS=678} [2024-06-27 20:43:25,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-27 20:43:25,397 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 678 transitions, 9606 flow [2024-06-27 20:43:25,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:25,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:25,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:25,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:43:25,398 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:25,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1945631519, now seen corresponding path program 1 times [2024-06-27 20:43:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70941655] [2024-06-27 20:43:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:26,268 INFO 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 20:43:26,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:26,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70941655] [2024-06-27 20:43:26,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70941655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:26,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:26,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891366615] [2024-06-27 20:43:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:26,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:26,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 678 transitions, 9606 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:26,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:26,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:26,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:28,450 INFO L124 PetriNetUnfolderBase]: 4075/6206 cut-off events. [2024-06-27 20:43:28,450 INFO L125 PetriNetUnfolderBase]: For 2767161/2767165 co-relation queries the response was YES. [2024-06-27 20:43:28,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83315 conditions, 6206 events. 4075/6206 cut-off events. For 2767161/2767165 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34875 event pairs, 729 based on Foata normal form. 5/6208 useless extension candidates. Maximal degree in co-relation 83092. Up to 6003 conditions per place. [2024-06-27 20:43:28,563 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 670 selfloop transitions, 26 changer transitions 0/700 dead transitions. [2024-06-27 20:43:28,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 700 transitions, 11202 flow [2024-06-27 20:43:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 20:43:28,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-27 20:43:28,565 INFO L175 Difference]: Start difference. First operand has 472 places, 678 transitions, 9606 flow. Second operand 10 states and 148 transitions. [2024-06-27 20:43:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 700 transitions, 11202 flow [2024-06-27 20:43:37,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 700 transitions, 10996 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 20:43:37,825 INFO L231 Difference]: Finished difference. Result has 477 places, 681 transitions, 9610 flow [2024-06-27 20:43:37,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9610, PETRI_PLACES=477, PETRI_TRANSITIONS=681} [2024-06-27 20:43:37,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-27 20:43:37,826 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 681 transitions, 9610 flow [2024-06-27 20:43:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:37,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:37,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:43:37,827 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:37,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1945618034, now seen corresponding path program 4 times [2024-06-27 20:43:37,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:37,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295430836] [2024-06-27 20:43:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:37,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:38,651 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 20:43:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:38,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295430836] [2024-06-27 20:43:38,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295430836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:38,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826721668] [2024-06-27 20:43:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:38,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:38,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:38,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 681 transitions, 9610 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:38,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:38,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:38,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:40,711 INFO L124 PetriNetUnfolderBase]: 4087/6218 cut-off events. [2024-06-27 20:43:40,711 INFO L125 PetriNetUnfolderBase]: For 2814595/2814603 co-relation queries the response was YES. [2024-06-27 20:43:40,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83906 conditions, 6218 events. 4087/6218 cut-off events. For 2814595/2814603 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34900 event pairs, 710 based on Foata normal form. 6/6220 useless extension candidates. Maximal degree in co-relation 83681. Up to 5675 conditions per place. [2024-06-27 20:43:40,825 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 590 selfloop transitions, 110 changer transitions 0/704 dead transitions. [2024-06-27 20:43:40,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 704 transitions, 11565 flow [2024-06-27 20:43:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:43:40,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:43:40,826 INFO L175 Difference]: Start difference. First operand has 477 places, 681 transitions, 9610 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:43:40,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 704 transitions, 11565 flow [2024-06-27 20:43:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 704 transitions, 11373 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-27 20:43:50,685 INFO L231 Difference]: Finished difference. Result has 479 places, 685 transitions, 9822 flow [2024-06-27 20:43:50,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9822, PETRI_PLACES=479, PETRI_TRANSITIONS=685} [2024-06-27 20:43:50,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-27 20:43:50,686 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 685 transitions, 9822 flow [2024-06-27 20:43:50,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:50,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:50,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:50,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:43:50,686 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:43:50,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash -408266232, now seen corresponding path program 5 times [2024-06-27 20:43:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:50,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940728168] [2024-06-27 20:43:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:51,530 INFO 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 20:43:51,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940728168] [2024-06-27 20:43:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940728168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:51,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:51,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:43:51,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915156735] [2024-06-27 20:43:51,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:51,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:43:51,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:43:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:43:51,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:43:51,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 685 transitions, 9822 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:51,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:51,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:43:51,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:53,935 INFO L124 PetriNetUnfolderBase]: 4081/6210 cut-off events. [2024-06-27 20:43:53,935 INFO L125 PetriNetUnfolderBase]: For 2817039/2817047 co-relation queries the response was YES. [2024-06-27 20:43:54,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83856 conditions, 6210 events. 4081/6210 cut-off events. For 2817039/2817047 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34890 event pairs, 714 based on Foata normal form. 6/6212 useless extension candidates. Maximal degree in co-relation 83630. Up to 5670 conditions per place. [2024-06-27 20:43:54,049 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 589 selfloop transitions, 111 changer transitions 0/704 dead transitions. [2024-06-27 20:43:54,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 704 transitions, 11604 flow [2024-06-27 20:43:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:43:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:43:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 20:43:54,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-27 20:43:54,051 INFO L175 Difference]: Start difference. First operand has 479 places, 685 transitions, 9822 flow. Second operand 10 states and 163 transitions. [2024-06-27 20:43:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 704 transitions, 11604 flow [2024-06-27 20:44:04,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 704 transitions, 11158 flow, removed 139 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:04,313 INFO L231 Difference]: Finished difference. Result has 482 places, 685 transitions, 9605 flow [2024-06-27 20:44:04,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9605, PETRI_PLACES=482, PETRI_TRANSITIONS=685} [2024-06-27 20:44:04,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-27 20:44:04,314 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 685 transitions, 9605 flow [2024-06-27 20:44:04,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:04,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:04,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:44:04,315 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:04,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash 246730669, now seen corresponding path program 2 times [2024-06-27 20:44:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:04,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626245768] [2024-06-27 20:44:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:05,355 INFO 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 20:44:05,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:05,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626245768] [2024-06-27 20:44:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626245768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:05,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747015129] [2024-06-27 20:44:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:05,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:05,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:05,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 685 transitions, 9605 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:44:05,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:05,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:05,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:07,557 INFO L124 PetriNetUnfolderBase]: 3955/6062 cut-off events. [2024-06-27 20:44:07,558 INFO L125 PetriNetUnfolderBase]: For 2838566/2838577 co-relation queries the response was YES. [2024-06-27 20:44:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83041 conditions, 6062 events. 3955/6062 cut-off events. For 2838566/2838577 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34479 event pairs, 703 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 82814. Up to 5215 conditions per place. [2024-06-27 20:44:07,829 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 102 changer transitions 0/711 dead transitions. [2024-06-27 20:44:07,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 711 transitions, 11120 flow [2024-06-27 20:44:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:44:07,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:44:07,830 INFO L175 Difference]: Start difference. First operand has 482 places, 685 transitions, 9605 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:44:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 711 transitions, 11120 flow [2024-06-27 20:44:17,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 711 transitions, 10896 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:17,946 INFO L231 Difference]: Finished difference. Result has 482 places, 688 transitions, 9700 flow [2024-06-27 20:44:17,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9381, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9700, PETRI_PLACES=482, PETRI_TRANSITIONS=688} [2024-06-27 20:44:17,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-27 20:44:17,946 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 688 transitions, 9700 flow [2024-06-27 20:44:17,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:44:17,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:17,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:44:17,947 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash -851616481, now seen corresponding path program 3 times [2024-06-27 20:44:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:17,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342084325] [2024-06-27 20:44:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:18,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342084325] [2024-06-27 20:44:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342084325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:18,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229484034] [2024-06-27 20:44:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:18,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:18,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:19,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 688 transitions, 9700 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:44:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:21,152 INFO L124 PetriNetUnfolderBase]: 3952/6061 cut-off events. [2024-06-27 20:44:21,153 INFO L125 PetriNetUnfolderBase]: For 2858143/2858151 co-relation queries the response was YES. [2024-06-27 20:44:21,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83099 conditions, 6061 events. 3952/6061 cut-off events. For 2858143/2858151 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34493 event pairs, 709 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 82871. Up to 5211 conditions per place. [2024-06-27 20:44:21,276 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 100 changer transitions 0/710 dead transitions. [2024-06-27 20:44:21,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 710 transitions, 11112 flow [2024-06-27 20:44:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:44:21,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:44:21,277 INFO L175 Difference]: Start difference. First operand has 482 places, 688 transitions, 9700 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:44:21,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 710 transitions, 11112 flow [2024-06-27 20:44:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 710 transitions, 10786 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:31,786 INFO L231 Difference]: Finished difference. Result has 484 places, 688 transitions, 9586 flow [2024-06-27 20:44:31,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9374, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9586, PETRI_PLACES=484, PETRI_TRANSITIONS=688} [2024-06-27 20:44:31,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-27 20:44:31,787 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 688 transitions, 9586 flow [2024-06-27 20:44:31,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:44:31,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:31,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:31,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:44:31,787 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:31,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash 27996420, now seen corresponding path program 7 times [2024-06-27 20:44:31,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:31,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570256154] [2024-06-27 20:44:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:31,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570256154] [2024-06-27 20:44:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570256154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:32,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913016770] [2024-06-27 20:44:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:32,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:32,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:32,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 688 transitions, 9586 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:32,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:32,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:32,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:34,699 INFO L124 PetriNetUnfolderBase]: 4093/6218 cut-off events. [2024-06-27 20:44:34,700 INFO L125 PetriNetUnfolderBase]: For 2902324/2902326 co-relation queries the response was YES. [2024-06-27 20:44:34,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84147 conditions, 6218 events. 4093/6218 cut-off events. For 2902324/2902326 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34894 event pairs, 752 based on Foata normal form. 2/6195 useless extension candidates. Maximal degree in co-relation 83918. Up to 5607 conditions per place. [2024-06-27 20:44:34,975 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 610 selfloop transitions, 101 changer transitions 0/715 dead transitions. [2024-06-27 20:44:34,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 715 transitions, 11234 flow [2024-06-27 20:44:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:44:34,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 20:44:34,976 INFO L175 Difference]: Start difference. First operand has 484 places, 688 transitions, 9586 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:44:34,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 715 transitions, 11234 flow [2024-06-27 20:44:45,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 715 transitions, 11003 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:45,728 INFO L231 Difference]: Finished difference. Result has 486 places, 691 transitions, 9685 flow [2024-06-27 20:44:45,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9355, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9685, PETRI_PLACES=486, PETRI_TRANSITIONS=691} [2024-06-27 20:44:45,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-27 20:44:45,729 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 691 transitions, 9685 flow [2024-06-27 20:44:45,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:45,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:44:45,729 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:45,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 31715490, now seen corresponding path program 8 times [2024-06-27 20:44:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295899315] [2024-06-27 20:44:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:46,449 INFO 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 20:44:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:46,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295899315] [2024-06-27 20:44:46,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295899315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:46,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:44:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590028917] [2024-06-27 20:44:46,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:46,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:44:46,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:44:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:44:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:46,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 691 transitions, 9685 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:46,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:46,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:46,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:48,817 INFO L124 PetriNetUnfolderBase]: 4119/6255 cut-off events. [2024-06-27 20:44:48,817 INFO L125 PetriNetUnfolderBase]: For 2971496/2971498 co-relation queries the response was YES. [2024-06-27 20:44:48,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85417 conditions, 6255 events. 4119/6255 cut-off events. For 2971496/2971498 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35095 event pairs, 758 based on Foata normal form. 2/6232 useless extension candidates. Maximal degree in co-relation 85187. Up to 5579 conditions per place. [2024-06-27 20:44:48,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 599 selfloop transitions, 121 changer transitions 0/724 dead transitions. [2024-06-27 20:44:48,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 724 transitions, 12279 flow [2024-06-27 20:44:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:44:48,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:44:48,942 INFO L175 Difference]: Start difference. First operand has 486 places, 691 transitions, 9685 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:44:48,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 724 transitions, 12279 flow [2024-06-27 20:44:59,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 724 transitions, 11977 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:59,738 INFO L231 Difference]: Finished difference. Result has 488 places, 700 transitions, 10003 flow [2024-06-27 20:44:59,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10003, PETRI_PLACES=488, PETRI_TRANSITIONS=700} [2024-06-27 20:44:59,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 20:44:59,739 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 700 transitions, 10003 flow [2024-06-27 20:44:59,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:59,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:59,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:44:59,740 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:59,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1229164537, now seen corresponding path program 4 times [2024-06-27 20:44:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360590489] [2024-06-27 20:44:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:00,805 INFO 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 20:45:00,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360590489] [2024-06-27 20:45:00,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360590489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:00,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:00,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:00,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864324345] [2024-06-27 20:45:00,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:00,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:00,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:00,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 700 transitions, 10003 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:45:00,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:00,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:00,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:02,966 INFO L124 PetriNetUnfolderBase]: 3991/6112 cut-off events. [2024-06-27 20:45:02,967 INFO L125 PetriNetUnfolderBase]: For 3013610/3013624 co-relation queries the response was YES. [2024-06-27 20:45:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85096 conditions, 6112 events. 3991/6112 cut-off events. For 3013610/3013624 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34854 event pairs, 690 based on Foata normal form. 1/6062 useless extension candidates. Maximal degree in co-relation 84865. Up to 5190 conditions per place. [2024-06-27 20:45:03,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 126 changer transitions 0/721 dead transitions. [2024-06-27 20:45:03,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 721 transitions, 11435 flow [2024-06-27 20:45:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:45:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:45:03,088 INFO L175 Difference]: Start difference. First operand has 488 places, 700 transitions, 10003 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:45:03,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 721 transitions, 11435 flow [2024-06-27 20:45:13,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 721 transitions, 11096 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:13,440 INFO L231 Difference]: Finished difference. Result has 492 places, 700 transitions, 9926 flow [2024-06-27 20:45:13,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9926, PETRI_PLACES=492, PETRI_TRANSITIONS=700} [2024-06-27 20:45:13,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-27 20:45:13,441 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 700 transitions, 9926 flow [2024-06-27 20:45:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 20:45:13,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:45:13,441 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:13,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1349383030, now seen corresponding path program 7 times [2024-06-27 20:45:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581466611] [2024-06-27 20:45:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:14,035 INFO 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 20:45:14,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:14,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581466611] [2024-06-27 20:45:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581466611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:14,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356253354] [2024-06-27 20:45:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:14,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:14,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:14,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 700 transitions, 9926 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:14,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:14,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:14,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:16,235 INFO L124 PetriNetUnfolderBase]: 3985/6125 cut-off events. [2024-06-27 20:45:16,235 INFO L125 PetriNetUnfolderBase]: For 3016321/3016335 co-relation queries the response was YES. [2024-06-27 20:45:16,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84708 conditions, 6125 events. 3985/6125 cut-off events. For 3016321/3016335 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34973 event pairs, 742 based on Foata normal form. 6/6103 useless extension candidates. Maximal degree in co-relation 84475. Up to 5251 conditions per place. [2024-06-27 20:45:16,378 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 579 selfloop transitions, 95 changer transitions 0/729 dead transitions. [2024-06-27 20:45:16,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 729 transitions, 11533 flow [2024-06-27 20:45:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:45:16,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:45:16,380 INFO L175 Difference]: Start difference. First operand has 492 places, 700 transitions, 9926 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:45:16,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 729 transitions, 11533 flow [2024-06-27 20:45:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 729 transitions, 11197 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:45:26,748 INFO L231 Difference]: Finished difference. Result has 493 places, 708 transitions, 9980 flow [2024-06-27 20:45:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9598, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9980, PETRI_PLACES=493, PETRI_TRANSITIONS=708} [2024-06-27 20:45:26,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-27 20:45:26,749 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 708 transitions, 9980 flow [2024-06-27 20:45:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:45:26,750 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:26,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:26,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1696885494, now seen corresponding path program 8 times [2024-06-27 20:45:26,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645638388] [2024-06-27 20:45:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:27,409 INFO 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 20:45:27,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645638388] [2024-06-27 20:45:27,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645638388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:27,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:27,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:27,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200779605] [2024-06-27 20:45:27,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:27,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:27,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:27,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:27,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:27,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 708 transitions, 9980 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:27,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:27,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:27,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:29,504 INFO L124 PetriNetUnfolderBase]: 3987/6136 cut-off events. [2024-06-27 20:45:29,505 INFO L125 PetriNetUnfolderBase]: For 3037448/3037462 co-relation queries the response was YES. [2024-06-27 20:45:29,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84979 conditions, 6136 events. 3987/6136 cut-off events. For 3037448/3037462 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35168 event pairs, 745 based on Foata normal form. 6/6114 useless extension candidates. Maximal degree in co-relation 84744. Up to 5238 conditions per place. [2024-06-27 20:45:29,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 575 selfloop transitions, 100 changer transitions 0/730 dead transitions. [2024-06-27 20:45:29,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 730 transitions, 11505 flow [2024-06-27 20:45:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:45:29,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:45:29,623 INFO L175 Difference]: Start difference. First operand has 493 places, 708 transitions, 9980 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:45:29,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 730 transitions, 11505 flow [2024-06-27 20:45:41,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 730 transitions, 11314 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:41,049 INFO L231 Difference]: Finished difference. Result has 497 places, 711 transitions, 10090 flow [2024-06-27 20:45:41,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9789, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10090, PETRI_PLACES=497, PETRI_TRANSITIONS=711} [2024-06-27 20:45:41,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-27 20:45:41,050 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 711 transitions, 10090 flow [2024-06-27 20:45:41,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:41,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:41,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:45:41,051 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:41,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1696885122, now seen corresponding path program 9 times [2024-06-27 20:45:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914987905] [2024-06-27 20:45:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:41,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:41,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914987905] [2024-06-27 20:45:41,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914987905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:41,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:41,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823114290] [2024-06-27 20:45:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:41,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:41,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:41,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 711 transitions, 10090 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:41,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:41,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:44,048 INFO L124 PetriNetUnfolderBase]: 4122/6259 cut-off events. [2024-06-27 20:45:44,048 INFO L125 PetriNetUnfolderBase]: For 3052965/3052967 co-relation queries the response was YES. [2024-06-27 20:45:44,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85818 conditions, 6259 events. 4122/6259 cut-off events. For 3052965/3052967 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35172 event pairs, 744 based on Foata normal form. 2/6236 useless extension candidates. Maximal degree in co-relation 85581. Up to 5648 conditions per place. [2024-06-27 20:45:44,179 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 625 selfloop transitions, 109 changer transitions 0/738 dead transitions. [2024-06-27 20:45:44,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 738 transitions, 11764 flow [2024-06-27 20:45:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:45:44,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:45:44,181 INFO L175 Difference]: Start difference. First operand has 497 places, 711 transitions, 10090 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:45:44,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 738 transitions, 11764 flow [2024-06-27 20:45:54,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 738 transitions, 11502 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:54,068 INFO L231 Difference]: Finished difference. Result has 500 places, 714 transitions, 10160 flow [2024-06-27 20:45:54,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9828, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10160, PETRI_PLACES=500, PETRI_TRANSITIONS=714} [2024-06-27 20:45:54,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-27 20:45:54,069 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 714 transitions, 10160 flow [2024-06-27 20:45:54,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:54,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:54,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:54,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:45:54,069 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:54,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -847801249, now seen corresponding path program 5 times [2024-06-27 20:45:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:54,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360293085] [2024-06-27 20:45:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:54,720 INFO 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 20:45:54,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:54,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360293085] [2024-06-27 20:45:54,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360293085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:54,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792841299] [2024-06-27 20:45:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:54,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:54,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 714 transitions, 10160 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:54,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:54,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:54,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:56,888 INFO L124 PetriNetUnfolderBase]: 4115/6255 cut-off events. [2024-06-27 20:45:56,889 INFO L125 PetriNetUnfolderBase]: For 3055541/3055543 co-relation queries the response was YES. [2024-06-27 20:45:56,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85720 conditions, 6255 events. 4115/6255 cut-off events. For 3055541/3055543 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 35147 event pairs, 724 based on Foata normal form. 1/6243 useless extension candidates. Maximal degree in co-relation 85482. Up to 5951 conditions per place. [2024-06-27 20:45:57,012 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 688 selfloop transitions, 41 changer transitions 0/733 dead transitions. [2024-06-27 20:45:57,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 733 transitions, 11680 flow [2024-06-27 20:45:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 20:45:57,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 20:45:57,013 INFO L175 Difference]: Start difference. First operand has 500 places, 714 transitions, 10160 flow. Second operand 9 states and 141 transitions. [2024-06-27 20:45:57,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 733 transitions, 11680 flow [2024-06-27 20:46:06,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 733 transitions, 11344 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:06,559 INFO L231 Difference]: Finished difference. Result has 502 places, 714 transitions, 9912 flow [2024-06-27 20:46:06,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9824, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9912, PETRI_PLACES=502, PETRI_TRANSITIONS=714} [2024-06-27 20:46:06,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-27 20:46:06,560 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 714 transitions, 9912 flow [2024-06-27 20:46:06,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:06,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:06,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:46:06,561 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:06,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2021846308, now seen corresponding path program 10 times [2024-06-27 20:46:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127742160] [2024-06-27 20:46:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:07,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127742160] [2024-06-27 20:46:07,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127742160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:07,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:07,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704847704] [2024-06-27 20:46:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:07,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:07,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:07,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:07,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:07,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 714 transitions, 9912 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:07,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:07,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:07,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:09,399 INFO L124 PetriNetUnfolderBase]: 4141/6277 cut-off events. [2024-06-27 20:46:09,400 INFO L125 PetriNetUnfolderBase]: For 3137931/3137933 co-relation queries the response was YES. [2024-06-27 20:46:09,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86429 conditions, 6277 events. 4141/6277 cut-off events. For 3137931/3137933 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35186 event pairs, 739 based on Foata normal form. 2/6256 useless extension candidates. Maximal degree in co-relation 86190. Up to 5581 conditions per place. [2024-06-27 20:46:09,524 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 603 selfloop transitions, 136 changer transitions 0/743 dead transitions. [2024-06-27 20:46:09,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 743 transitions, 12116 flow [2024-06-27 20:46:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:46:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:46:09,525 INFO L175 Difference]: Start difference. First operand has 502 places, 714 transitions, 9912 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:46:09,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 743 transitions, 12116 flow [2024-06-27 20:46:20,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 743 transitions, 11712 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-27 20:46:20,020 INFO L231 Difference]: Finished difference. Result has 498 places, 720 transitions, 10060 flow [2024-06-27 20:46:20,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9508, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10060, PETRI_PLACES=498, PETRI_TRANSITIONS=720} [2024-06-27 20:46:20,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-27 20:46:20,021 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 720 transitions, 10060 flow [2024-06-27 20:46:20,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:20,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:20,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:46:20,022 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:20,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2002209030, now seen corresponding path program 9 times [2024-06-27 20:46:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:20,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18683530] [2024-06-27 20:46:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18683530] [2024-06-27 20:46:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18683530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:20,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48426764] [2024-06-27 20:46:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:20,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:20,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 720 transitions, 10060 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:20,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:20,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:20,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:22,800 INFO L124 PetriNetUnfolderBase]: 4022/6176 cut-off events. [2024-06-27 20:46:22,800 INFO L125 PetriNetUnfolderBase]: For 3214994/3215014 co-relation queries the response was YES. [2024-06-27 20:46:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86992 conditions, 6176 events. 4022/6176 cut-off events. For 3214994/3215014 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35397 event pairs, 745 based on Foata normal form. 6/6140 useless extension candidates. Maximal degree in co-relation 86752. Up to 5206 conditions per place. [2024-06-27 20:46:22,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 561 selfloop transitions, 121 changer transitions 0/740 dead transitions. [2024-06-27 20:46:22,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 740 transitions, 11585 flow [2024-06-27 20:46:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:46:22,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:46:22,922 INFO L175 Difference]: Start difference. First operand has 498 places, 720 transitions, 10060 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:46:22,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 740 transitions, 11585 flow [2024-06-27 20:46:33,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 740 transitions, 11271 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:33,843 INFO L231 Difference]: Finished difference. Result has 501 places, 723 transitions, 10071 flow [2024-06-27 20:46:33,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9746, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10071, PETRI_PLACES=501, PETRI_TRANSITIONS=723} [2024-06-27 20:46:33,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 20:46:33,844 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 723 transitions, 10071 flow [2024-06-27 20:46:33,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:33,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:33,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:46:33,844 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:33,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1342622082, now seen corresponding path program 11 times [2024-06-27 20:46:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:33,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435141413] [2024-06-27 20:46:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:34,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435141413] [2024-06-27 20:46:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435141413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:46:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805337650] [2024-06-27 20:46:34,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:34,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:46:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:46:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:46:34,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 723 transitions, 10071 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:36,720 INFO L124 PetriNetUnfolderBase]: 4145/6283 cut-off events. [2024-06-27 20:46:36,720 INFO L125 PetriNetUnfolderBase]: For 3178525/3178527 co-relation queries the response was YES. [2024-06-27 20:46:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87085 conditions, 6283 events. 4145/6283 cut-off events. For 3178525/3178527 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35203 event pairs, 742 based on Foata normal form. 2/6262 useless extension candidates. Maximal degree in co-relation 86843. Up to 5590 conditions per place. [2024-06-27 20:46:37,046 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 608 selfloop transitions, 133 changer transitions 0/745 dead transitions. [2024-06-27 20:46:37,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 745 transitions, 11661 flow [2024-06-27 20:46:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:46:37,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:46:37,047 INFO L175 Difference]: Start difference. First operand has 501 places, 723 transitions, 10071 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:46:37,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 745 transitions, 11661 flow Killed by 15