./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.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/safe011_power.opt_pso.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/safe011_power.opt_pso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe011_power.opt_pso.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 21:04:41,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:04:41,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:04:41,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:04:41,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:04:41,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:04:41,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:04:41,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:04:41,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:04:41,949 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:04:41,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:04:41,950 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:04:41,950 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:04:41,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:04:41,951 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:04:41,951 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:04:41,952 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:04:41,952 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:04:41,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:04:41,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:04:41,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:04:41,954 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:04:41,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:04:41,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:04:41,954 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:04:41,955 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:04:41,955 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:04:41,955 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:04:41,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:04:41,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:04:41,956 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:04:41,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:04:41,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:04:41,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:04:41,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:04:41,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:04:41,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:04:41,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:04:41,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:04:41,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:04:41,959 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:04:41,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:04:41,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:04:41,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:04:42,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:04:42,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:04:42,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:04:42,159 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:04:42,160 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:04:42,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe011_power.opt_pso.opt.yml/witness.yml [2024-06-27 21:04:42,370 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:04:42,370 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:04:42,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-27 21:04:43,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:04:43,563 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:04:43,564 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-27 21:04:43,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6ce7c6e/bc6dc6baa202495cb14b3121f4aa408a/FLAG045fae27b [2024-06-27 21:04:43,610 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d6ce7c6e/bc6dc6baa202495cb14b3121f4aa408a [2024-06-27 21:04:43,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:04:43,612 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:04:43,613 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:04:43,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:04:43,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:04:43,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:04:42" (1/2) ... [2024-06-27 21:04:43,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504c0ed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:04:43, skipping insertion in model container [2024-06-27 21:04:43,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:04:42" (1/2) ... [2024-06-27 21:04:43,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b94e8fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:04:43, skipping insertion in model container [2024-06-27 21:04:43,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:04:43" (2/2) ... [2024-06-27 21:04:43,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504c0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:43, skipping insertion in model container [2024-06-27 21:04:43,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:04:43" (2/2) ... [2024-06-27 21:04:43,619 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:04:43,685 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:04:43,686 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 21:04:43,686 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 21:04:43,686 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-27 21:04:43,686 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:04:43,686 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-27 21:04:43,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:04:44,072 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:04:44,081 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:04:44,196 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:04:44,230 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:04:44,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44 WrapperNode [2024-06-27 21:04:44,231 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:04:44,232 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:04:44,232 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:04:44,232 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:04:44,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,295 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-27 21:04:44,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:04:44,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:04:44,296 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:04:44,296 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:04:44,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,340 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 21:04:44,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:04:44,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:04:44,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:04:44,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:04:44,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (1/1) ... [2024-06-27 21:04:44,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:04:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:04:44,407 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 21:04:44,430 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 21:04:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:04:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:04:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:04:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:04:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:04:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:04:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:04:44,455 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:04:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:04:44,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:04:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:04:44,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:04:44,457 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 21:04:44,550 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:04:44,551 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:04:44,804 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:04:44,804 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:04:44,941 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:04:44,941 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:04:44,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:04:44 BoogieIcfgContainer [2024-06-27 21:04:44,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:04:44,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:04:44,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:04:44,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:04:44,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:04:42" (1/4) ... [2024-06-27 21:04:44,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405bce6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:04:44, skipping insertion in model container [2024-06-27 21:04:44,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:04:43" (2/4) ... [2024-06-27 21:04:44,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405bce6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:04:44, skipping insertion in model container [2024-06-27 21:04:44,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:04:44" (3/4) ... [2024-06-27 21:04:44,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405bce6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:04:44, skipping insertion in model container [2024-06-27 21:04:44,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:04:44" (4/4) ... [2024-06-27 21:04:44,948 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_power.opt_pso.opt.i [2024-06-27 21:04:44,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:04:44,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:04:44,960 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:04:44,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:04:45,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:04:45,029 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 21:04:45,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:04:45,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 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. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:04:45,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 21:04:45,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 21:04:45,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:04:45,044 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;@4167f8e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:04:45,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:04:45,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:04:45,047 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:04:45,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:04:45,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:45,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:04:45,048 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 21:04:45,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-27 21:04:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130047340] [2024-06-27 21:04:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:45,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130047340] [2024-06-27 21:04:45,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130047340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:45,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:04:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886396401] [2024-06-27 21:04:45,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:45,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:04:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:45,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:04:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:04:45,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:04:45,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:45,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:45,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:04:45,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:46,187 INFO L124 PetriNetUnfolderBase]: 1407/2118 cut-off events. [2024-06-27 21:04:46,187 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 21:04:46,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4322 conditions, 2118 events. 1407/2118 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9683 event pairs, 989 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 4310. Up to 2105 conditions per place. [2024-06-27 21:04:46,200 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 21:04:46,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 169 flow [2024-06-27 21:04:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:04:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:04:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-27 21:04:46,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 21:04:46,210 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 69 transitions. [2024-06-27 21:04:46,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 169 flow [2024-06-27 21:04:46,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:46,214 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 21:04:46,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 21:04:46,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 21:04:46,218 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 21:04:46,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:46,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:46,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:04:46,219 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 21:04:46,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2060553313, now seen corresponding path program 1 times [2024-06-27 21:04:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:46,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779040219] [2024-06-27 21:04:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:46,567 INFO 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 21:04:46,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779040219] [2024-06-27 21:04:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779040219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:04:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377884789] [2024-06-27 21:04:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:04:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:04:46,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:04:46,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:04:46,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:46,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:04:46,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:46,841 INFO L124 PetriNetUnfolderBase]: 1415/2129 cut-off events. [2024-06-27 21:04:46,841 INFO L125 PetriNetUnfolderBase]: For 400/408 co-relation queries the response was YES. [2024-06-27 21:04:46,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4912 conditions, 2129 events. 1415/2129 cut-off events. For 400/408 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9668 event pairs, 866 based on Foata normal form. 8/2135 useless extension candidates. Maximal degree in co-relation 4900. Up to 2072 conditions per place. [2024-06-27 21:04:46,851 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-27 21:04:46,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 274 flow [2024-06-27 21:04:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:04:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:04:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-27 21:04:46,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 21:04:46,853 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 95 transitions. [2024-06-27 21:04:46,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 274 flow [2024-06-27 21:04:46,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:04:46,855 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-27 21:04:46,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-27 21:04:46,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 21:04:46,856 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-27 21:04:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:46,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:46,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:46,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:04:46,857 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 21:04:46,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -547356015, now seen corresponding path program 1 times [2024-06-27 21:04:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:46,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026517492] [2024-06-27 21:04:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:46,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:47,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026517492] [2024-06-27 21:04:47,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026517492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:47,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:47,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:04:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665740252] [2024-06-27 21:04:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:04:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:04:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:04:47,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:04:47,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:47,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:47,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:04:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:47,503 INFO L124 PetriNetUnfolderBase]: 1431/2151 cut-off events. [2024-06-27 21:04:47,503 INFO L125 PetriNetUnfolderBase]: For 1373/1390 co-relation queries the response was YES. [2024-06-27 21:04:47,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 2151 events. 1431/2151 cut-off events. For 1373/1390 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9807 event pairs, 618 based on Foata normal form. 16/2165 useless extension candidates. Maximal degree in co-relation 5791. Up to 2012 conditions per place. [2024-06-27 21:04:47,515 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-06-27 21:04:47,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 412 flow [2024-06-27 21:04:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:04:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:04:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 21:04:47,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 21:04:47,518 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 120 transitions. [2024-06-27 21:04:47,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 412 flow [2024-06-27 21:04:47,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 408 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 21:04:47,521 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 249 flow [2024-06-27 21:04:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-27 21:04:47,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-27 21:04:47,522 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 249 flow [2024-06-27 21:04:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:47,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:47,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:04:47,523 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 21:04:47,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash -304157824, now seen corresponding path program 1 times [2024-06-27 21:04:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826390195] [2024-06-27 21:04:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:48,380 INFO 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 21:04:48,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826390195] [2024-06-27 21:04:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826390195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:48,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:48,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703131319] [2024-06-27 21:04:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:48,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 21:04:48,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:04:48,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:48,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 21:04:48,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:48,816 INFO L124 PetriNetUnfolderBase]: 1482/2232 cut-off events. [2024-06-27 21:04:48,816 INFO L125 PetriNetUnfolderBase]: For 2719/2734 co-relation queries the response was YES. [2024-06-27 21:04:48,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6796 conditions, 2232 events. 1482/2232 cut-off events. For 2719/2734 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10257 event pairs, 484 based on Foata normal form. 24/2254 useless extension candidates. Maximal degree in co-relation 6778. Up to 1991 conditions per place. [2024-06-27 21:04:48,827 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 63 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-27 21:04:48,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 521 flow [2024-06-27 21:04:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:04:48,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 21:04:48,830 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 249 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:04:48,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 521 flow [2024-06-27 21:04:48,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 505 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 21:04:48,833 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 291 flow [2024-06-27 21:04:48,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 21:04:48,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 21:04:48,834 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 291 flow [2024-06-27 21:04:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:04:48,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:48,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:48,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:04:48,835 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 21:04:48,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:48,835 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-27 21:04:48,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:48,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224392980] [2024-06-27 21:04:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:48,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224392980] [2024-06-27 21:04:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224392980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:49,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:49,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:04:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478118610] [2024-06-27 21:04:49,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:04:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:49,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:04:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:04:49,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:49,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:49,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:49,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:49,557 INFO L124 PetriNetUnfolderBase]: 1477/2225 cut-off events. [2024-06-27 21:04:49,557 INFO L125 PetriNetUnfolderBase]: For 3933/3948 co-relation queries the response was YES. [2024-06-27 21:04:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 2225 events. 1477/2225 cut-off events. For 3933/3948 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10131 event pairs, 700 based on Foata normal form. 8/2231 useless extension candidates. Maximal degree in co-relation 7255. Up to 2203 conditions per place. [2024-06-27 21:04:49,570 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-27 21:04:49,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 457 flow [2024-06-27 21:04:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:04:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:04:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 21:04:49,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:04:49,572 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 291 flow. Second operand 5 states and 85 transitions. [2024-06-27 21:04:49,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 457 flow [2024-06-27 21:04:49,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 415 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:04:49,576 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 297 flow [2024-06-27 21:04:49,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-27 21:04:49,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-27 21:04:49,577 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 297 flow [2024-06-27 21:04:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:49,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:49,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:49,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:04:49,577 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 21:04:49,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-27 21:04:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911758604] [2024-06-27 21:04:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:50,056 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 21:04:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911758604] [2024-06-27 21:04:50,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911758604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:50,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:50,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:50,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136839801] [2024-06-27 21:04:50,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:50,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:50,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:50,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:50,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:50,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:50,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:50,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:50,393 INFO L124 PetriNetUnfolderBase]: 1704/2550 cut-off events. [2024-06-27 21:04:50,393 INFO L125 PetriNetUnfolderBase]: For 5457/5457 co-relation queries the response was YES. [2024-06-27 21:04:50,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8512 conditions, 2550 events. 1704/2550 cut-off events. For 5457/5457 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11720 event pairs, 828 based on Foata normal form. 2/2550 useless extension candidates. Maximal degree in co-relation 8488. Up to 2520 conditions per place. [2024-06-27 21:04:50,408 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 63 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-27 21:04:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 536 flow [2024-06-27 21:04:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 21:04:50,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:04:50,410 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 297 flow. Second operand 6 states and 95 transitions. [2024-06-27 21:04:50,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 536 flow [2024-06-27 21:04:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 503 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:50,414 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 369 flow [2024-06-27 21:04:50,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=369, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2024-06-27 21:04:50,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-27 21:04:50,415 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 369 flow [2024-06-27 21:04:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:50,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:50,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:04:50,416 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 21:04:50,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1038860089, now seen corresponding path program 1 times [2024-06-27 21:04:50,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831491410] [2024-06-27 21:04:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:50,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:50,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831491410] [2024-06-27 21:04:50,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831491410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:50,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:50,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:50,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778228261] [2024-06-27 21:04:50,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:50,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:50,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:50,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:50,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:50,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:50,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:51,331 INFO L124 PetriNetUnfolderBase]: 1650/2481 cut-off events. [2024-06-27 21:04:51,331 INFO L125 PetriNetUnfolderBase]: For 7642/7691 co-relation queries the response was YES. [2024-06-27 21:04:51,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9083 conditions, 2481 events. 1650/2481 cut-off events. For 7642/7691 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11426 event pairs, 720 based on Foata normal form. 16/2487 useless extension candidates. Maximal degree in co-relation 9056. Up to 2412 conditions per place. [2024-06-27 21:04:51,346 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-27 21:04:51,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 669 flow [2024-06-27 21:04:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:04:51,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:04:51,347 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 369 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:04:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 669 flow [2024-06-27 21:04:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 661 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 21:04:51,352 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 511 flow [2024-06-27 21:04:51,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=511, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-06-27 21:04:51,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-27 21:04:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 511 flow [2024-06-27 21:04:51,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:51,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:51,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:04:51,354 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 21:04:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash 130490291, now seen corresponding path program 2 times [2024-06-27 21:04:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:51,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380977165] [2024-06-27 21:04:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:51,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:51,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:51,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380977165] [2024-06-27 21:04:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380977165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:51,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:51,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:04:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878396876] [2024-06-27 21:04:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:51,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:04:51,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:51,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:04:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:04:51,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:51,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 511 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:51,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:51,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:51,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:52,250 INFO L124 PetriNetUnfolderBase]: 1704/2560 cut-off events. [2024-06-27 21:04:52,250 INFO L125 PetriNetUnfolderBase]: For 10266/10336 co-relation queries the response was YES. [2024-06-27 21:04:52,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 2560 events. 1704/2560 cut-off events. For 10266/10336 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11830 event pairs, 722 based on Foata normal form. 17/2566 useless extension candidates. Maximal degree in co-relation 10528. Up to 2428 conditions per place. [2024-06-27 21:04:52,263 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 68 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-06-27 21:04:52,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 843 flow [2024-06-27 21:04:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:04:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:04:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:04:52,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-27 21:04:52,265 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 511 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:04:52,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 843 flow [2024-06-27 21:04:52,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 811 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:52,272 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 630 flow [2024-06-27 21:04:52,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=630, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-27 21:04:52,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-27 21:04:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 630 flow [2024-06-27 21:04:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:04:52,273 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 21:04:52,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-27 21:04:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:52,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396699144] [2024-06-27 21:04:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:52,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:53,047 INFO 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 21:04:53,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396699144] [2024-06-27 21:04:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396699144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:53,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:53,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117311142] [2024-06-27 21:04:53,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:53,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:53,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:53,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:53,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:53,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:53,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:53,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:53,490 INFO L124 PetriNetUnfolderBase]: 1751/2617 cut-off events. [2024-06-27 21:04:53,491 INFO L125 PetriNetUnfolderBase]: For 12753/12753 co-relation queries the response was YES. [2024-06-27 21:04:53,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11265 conditions, 2617 events. 1751/2617 cut-off events. For 12753/12753 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11966 event pairs, 792 based on Foata normal form. 2/2617 useless extension candidates. Maximal degree in co-relation 11230. Up to 2578 conditions per place. [2024-06-27 21:04:53,507 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 86 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-27 21:04:53,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 896 flow [2024-06-27 21:04:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:04:53,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 21:04:53,508 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 630 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:04:53,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 896 flow [2024-06-27 21:04:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 103 transitions, 851 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:53,520 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 645 flow [2024-06-27 21:04:53,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=645, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-27 21:04:53,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-27 21:04:53,521 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 645 flow [2024-06-27 21:04:53,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:53,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:53,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:53,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:04:53,522 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 21:04:53,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2053725543, now seen corresponding path program 1 times [2024-06-27 21:04:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407159881] [2024-06-27 21:04:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:53,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:54,009 INFO 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 21:04:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407159881] [2024-06-27 21:04:54,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407159881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:54,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:54,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358477200] [2024-06-27 21:04:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:54,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:54,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 645 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:54,567 INFO L124 PetriNetUnfolderBase]: 1731/2601 cut-off events. [2024-06-27 21:04:54,567 INFO L125 PetriNetUnfolderBase]: For 17127/17164 co-relation queries the response was YES. [2024-06-27 21:04:54,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11968 conditions, 2601 events. 1731/2601 cut-off events. For 17127/17164 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12198 event pairs, 572 based on Foata normal form. 27/2580 useless extension candidates. Maximal degree in co-relation 11931. Up to 2368 conditions per place. [2024-06-27 21:04:54,582 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 84 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-27 21:04:54,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1050 flow [2024-06-27 21:04:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:04:54,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-27 21:04:54,584 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 645 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:04:54,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1050 flow [2024-06-27 21:04:54,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 1014 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:54,598 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 766 flow [2024-06-27 21:04:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-27 21:04:54,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 21:04:54,600 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 766 flow [2024-06-27 21:04:54,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:54,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:54,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:54,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:04:54,601 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 21:04:54,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2139890029, now seen corresponding path program 1 times [2024-06-27 21:04:54,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:54,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935845601] [2024-06-27 21:04:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935845601] [2024-06-27 21:04:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935845601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:55,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793852616] [2024-06-27 21:04:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:55,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:55,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:55,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:55,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:55,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:55,585 INFO L124 PetriNetUnfolderBase]: 1829/2729 cut-off events. [2024-06-27 21:04:55,586 INFO L125 PetriNetUnfolderBase]: For 18296/18296 co-relation queries the response was YES. [2024-06-27 21:04:55,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13344 conditions, 2729 events. 1829/2729 cut-off events. For 18296/18296 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12475 event pairs, 626 based on Foata normal form. 2/2729 useless extension candidates. Maximal degree in co-relation 13305. Up to 2684 conditions per place. [2024-06-27 21:04:55,600 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-06-27 21:04:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 124 transitions, 1135 flow [2024-06-27 21:04:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 21:04:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:04:55,602 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 766 flow. Second operand 7 states and 112 transitions. [2024-06-27 21:04:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 124 transitions, 1135 flow [2024-06-27 21:04:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 124 transitions, 1062 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:55,614 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 822 flow [2024-06-27 21:04:55,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-27 21:04:55,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-27 21:04:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 822 flow [2024-06-27 21:04:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:55,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:55,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:04:55,616 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 21:04:55,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2139890215, now seen corresponding path program 2 times [2024-06-27 21:04:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:55,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507998855] [2024-06-27 21:04:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:56,145 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 21:04:56,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507998855] [2024-06-27 21:04:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507998855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:56,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:56,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613222904] [2024-06-27 21:04:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:56,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:56,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:56,670 INFO L124 PetriNetUnfolderBase]: 1843/2766 cut-off events. [2024-06-27 21:04:56,671 INFO L125 PetriNetUnfolderBase]: For 24588/24635 co-relation queries the response was YES. [2024-06-27 21:04:56,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14255 conditions, 2766 events. 1843/2766 cut-off events. For 24588/24635 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13064 event pairs, 544 based on Foata normal form. 34/2757 useless extension candidates. Maximal degree in co-relation 14213. Up to 2416 conditions per place. [2024-06-27 21:04:56,689 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 88 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-27 21:04:56,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 144 transitions, 1366 flow [2024-06-27 21:04:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 21:04:56,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-27 21:04:56,691 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 822 flow. Second operand 7 states and 137 transitions. [2024-06-27 21:04:56,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 144 transitions, 1366 flow [2024-06-27 21:04:56,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 144 transitions, 1340 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:56,706 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1029 flow [2024-06-27 21:04:56,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1029, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-27 21:04:56,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 21:04:56,707 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1029 flow [2024-06-27 21:04:56,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:56,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:56,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:56,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:04:56,708 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 21:04:56,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2058493839, now seen corresponding path program 2 times [2024-06-27 21:04:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166447500] [2024-06-27 21:04:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:57,264 INFO 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 21:04:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:57,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166447500] [2024-06-27 21:04:57,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166447500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:57,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:57,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996991959] [2024-06-27 21:04:57,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:57,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:57,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1029 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:57,730 INFO L124 PetriNetUnfolderBase]: 1956/2911 cut-off events. [2024-06-27 21:04:57,731 INFO L125 PetriNetUnfolderBase]: For 27701/27716 co-relation queries the response was YES. [2024-06-27 21:04:57,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 2911 events. 1956/2911 cut-off events. For 27701/27716 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13401 event pairs, 624 based on Foata normal form. 12/2919 useless extension candidates. Maximal degree in co-relation 15828. Up to 2817 conditions per place. [2024-06-27 21:04:57,748 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 111 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2024-06-27 21:04:57,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 141 transitions, 1475 flow [2024-06-27 21:04:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 21:04:57,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 21:04:57,750 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1029 flow. Second operand 7 states and 114 transitions. [2024-06-27 21:04:57,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 141 transitions, 1475 flow [2024-06-27 21:04:57,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 141 transitions, 1395 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 21:04:57,773 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 1101 flow [2024-06-27 21:04:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1101, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-27 21:04:57,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-27 21:04:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 1101 flow [2024-06-27 21:04:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:04:57,774 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758509, now seen corresponding path program 3 times [2024-06-27 21:04:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262444368] [2024-06-27 21:04:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:58,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:58,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262444368] [2024-06-27 21:04:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262444368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:58,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:58,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549207081] [2024-06-27 21:04:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:58,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:58,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:58,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 1101 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:58,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:58,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:58,718 INFO L124 PetriNetUnfolderBase]: 1951/2904 cut-off events. [2024-06-27 21:04:58,718 INFO L125 PetriNetUnfolderBase]: For 30541/30556 co-relation queries the response was YES. [2024-06-27 21:04:58,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2904 events. 1951/2904 cut-off events. For 30541/30556 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13395 event pairs, 642 based on Foata normal form. 12/2912 useless extension candidates. Maximal degree in co-relation 16221. Up to 2812 conditions per place. [2024-06-27 21:04:58,735 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-06-27 21:04:58,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 139 transitions, 1421 flow [2024-06-27 21:04:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 21:04:58,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 21:04:58,736 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 1101 flow. Second operand 7 states and 113 transitions. [2024-06-27 21:04:58,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 139 transitions, 1421 flow [2024-06-27 21:04:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1377 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:58,764 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 1117 flow [2024-06-27 21:04:58,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1117, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-27 21:04:58,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-27 21:04:58,765 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 1117 flow [2024-06-27 21:04:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:58,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:04:58,765 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 21:04:58,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2058487143, now seen corresponding path program 3 times [2024-06-27 21:04:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:58,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4057801] [2024-06-27 21:04:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:58,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:59,290 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 21:04:59,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4057801] [2024-06-27 21:04:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4057801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:59,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:04:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013905168] [2024-06-27 21:04:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:04:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:59,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:04:59,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:04:59,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:04:59,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 1117 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:59,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:59,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:04:59,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:59,802 INFO L124 PetriNetUnfolderBase]: 1895/2846 cut-off events. [2024-06-27 21:04:59,802 INFO L125 PetriNetUnfolderBase]: For 36571/36628 co-relation queries the response was YES. [2024-06-27 21:04:59,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16427 conditions, 2846 events. 1895/2846 cut-off events. For 36571/36628 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13489 event pairs, 580 based on Foata normal form. 27/2819 useless extension candidates. Maximal degree in co-relation 16377. Up to 2295 conditions per place. [2024-06-27 21:04:59,821 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 93 selfloop transitions, 55 changer transitions 0/162 dead transitions. [2024-06-27 21:04:59,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 162 transitions, 1781 flow [2024-06-27 21:04:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:04:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:04:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 21:04:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 21:04:59,823 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 1117 flow. Second operand 7 states and 134 transitions. [2024-06-27 21:04:59,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 162 transitions, 1781 flow [2024-06-27 21:04:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 162 transitions, 1697 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:04:59,849 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1356 flow [2024-06-27 21:04:59,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1356, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2024-06-27 21:04:59,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 21:04:59,849 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1356 flow [2024-06-27 21:04:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:59,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:59,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:04:59,850 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 21:04:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-27 21:04:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474390205] [2024-06-27 21:04:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474390205] [2024-06-27 21:05:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474390205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637239394] [2024-06-27 21:05:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:00,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:00,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1356 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:00,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:00,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:00,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:01,166 INFO L124 PetriNetUnfolderBase]: 1963/2919 cut-off events. [2024-06-27 21:05:01,167 INFO L125 PetriNetUnfolderBase]: For 38668/38668 co-relation queries the response was YES. [2024-06-27 21:05:01,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17676 conditions, 2919 events. 1963/2919 cut-off events. For 38668/38668 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13477 event pairs, 618 based on Foata normal form. 4/2921 useless extension candidates. Maximal degree in co-relation 17625. Up to 2862 conditions per place. [2024-06-27 21:05:01,187 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 16 changer transitions 0/157 dead transitions. [2024-06-27 21:05:01,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1746 flow [2024-06-27 21:05:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:05:01,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 21:05:01,190 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1356 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:05:01,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1746 flow [2024-06-27 21:05:01,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1658 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:01,228 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1333 flow [2024-06-27 21:05:01,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-27 21:05:01,228 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 21:05:01,228 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1333 flow [2024-06-27 21:05:01,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:01,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:01,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:01,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:05:01,229 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 21:05:01,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:01,230 INFO L85 PathProgramCache]: Analyzing trace with hash 647715542, now seen corresponding path program 1 times [2024-06-27 21:05:01,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:01,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134509275] [2024-06-27 21:05:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:01,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:01,969 INFO 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 21:05:01,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134509275] [2024-06-27 21:05:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134509275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:01,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:01,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:01,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749033857] [2024-06-27 21:05:01,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:02,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:02,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1333 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:05:02,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:02,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:02,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:02,622 INFO L124 PetriNetUnfolderBase]: 1864/2794 cut-off events. [2024-06-27 21:05:02,623 INFO L125 PetriNetUnfolderBase]: For 41241/41305 co-relation queries the response was YES. [2024-06-27 21:05:02,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 2794 events. 1864/2794 cut-off events. For 41241/41305 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13064 event pairs, 565 based on Foata normal form. 36/2803 useless extension candidates. Maximal degree in co-relation 17104. Up to 2513 conditions per place. [2024-06-27 21:05:02,642 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 37 changer transitions 0/167 dead transitions. [2024-06-27 21:05:02,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 167 transitions, 1801 flow [2024-06-27 21:05:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:05:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:05:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 21:05:02,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 21:05:02,645 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1333 flow. Second operand 7 states and 135 transitions. [2024-06-27 21:05:02,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 167 transitions, 1801 flow [2024-06-27 21:05:02,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1756 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:02,681 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1410 flow [2024-06-27 21:05:02,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1410, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-27 21:05:02,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-27 21:05:02,681 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1410 flow [2024-06-27 21:05:02,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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 21:05:02,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:02,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:02,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:05:02,682 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:02,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash -759015949, now seen corresponding path program 1 times [2024-06-27 21:05:02,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:02,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819821465] [2024-06-27 21:05:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:02,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:03,213 INFO 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 21:05:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819821465] [2024-06-27 21:05:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819821465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:03,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:03,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:03,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950121510] [2024-06-27 21:05:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:03,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:03,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1410 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:03,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:03,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:03,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:03,790 INFO L124 PetriNetUnfolderBase]: 1974/2937 cut-off events. [2024-06-27 21:05:03,790 INFO L125 PetriNetUnfolderBase]: For 44034/44034 co-relation queries the response was YES. [2024-06-27 21:05:03,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18158 conditions, 2937 events. 1974/2937 cut-off events. For 44034/44034 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13448 event pairs, 595 based on Foata normal form. 4/2939 useless extension candidates. Maximal degree in co-relation 18104. Up to 2839 conditions per place. [2024-06-27 21:05:03,811 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 155 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-27 21:05:03,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 178 transitions, 1964 flow [2024-06-27 21:05:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:05:03,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:05:03,813 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1410 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:05:03,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 178 transitions, 1964 flow [2024-06-27 21:05:03,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 178 transitions, 1870 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:03,850 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1520 flow [2024-06-27 21:05:03,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1520, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2024-06-27 21:05:03,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-27 21:05:03,851 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1520 flow [2024-06-27 21:05:03,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:03,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:03,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:03,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:05:03,852 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 21:05:03,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -915277533, now seen corresponding path program 2 times [2024-06-27 21:05:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261733881] [2024-06-27 21:05:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:04,402 INFO 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 21:05:04,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:04,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261733881] [2024-06-27 21:05:04,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261733881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:04,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:04,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369853761] [2024-06-27 21:05:04,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:04,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:04,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:04,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:04,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1520 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:04,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:04,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:04,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:04,979 INFO L124 PetriNetUnfolderBase]: 2124/3153 cut-off events. [2024-06-27 21:05:04,980 INFO L125 PetriNetUnfolderBase]: For 51483/51483 co-relation queries the response was YES. [2024-06-27 21:05:04,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19882 conditions, 3153 events. 2124/3153 cut-off events. For 51483/51483 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14542 event pairs, 546 based on Foata normal form. 4/3155 useless extension candidates. Maximal degree in co-relation 19824. Up to 2855 conditions per place. [2024-06-27 21:05:05,002 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 159 selfloop transitions, 34 changer transitions 0/196 dead transitions. [2024-06-27 21:05:05,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 196 transitions, 2296 flow [2024-06-27 21:05:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:05:05,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:05:05,004 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1520 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:05:05,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 196 transitions, 2296 flow [2024-06-27 21:05:05,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 196 transitions, 2254 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:05,060 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1737 flow [2024-06-27 21:05:05,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1737, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-27 21:05:05,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-27 21:05:05,061 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1737 flow [2024-06-27 21:05:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:05,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:05:05,062 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 21:05:05,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1912079987, now seen corresponding path program 3 times [2024-06-27 21:05:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949452850] [2024-06-27 21:05:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:05,569 INFO 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 21:05:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949452850] [2024-06-27 21:05:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949452850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:05,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:05,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791610419] [2024-06-27 21:05:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:05,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:05,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1737 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:05,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:05,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:05,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:06,139 INFO L124 PetriNetUnfolderBase]: 2110/3135 cut-off events. [2024-06-27 21:05:06,139 INFO L125 PetriNetUnfolderBase]: For 58151/58151 co-relation queries the response was YES. [2024-06-27 21:05:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20888 conditions, 3135 events. 2110/3135 cut-off events. For 58151/58151 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14445 event pairs, 537 based on Foata normal form. 8/3141 useless extension candidates. Maximal degree in co-relation 20826. Up to 2851 conditions per place. [2024-06-27 21:05:06,163 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 156 selfloop transitions, 37 changer transitions 0/196 dead transitions. [2024-06-27 21:05:06,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 196 transitions, 2333 flow [2024-06-27 21:05:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:05:06,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:05:06,165 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1737 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:05:06,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 196 transitions, 2333 flow [2024-06-27 21:05:06,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 2253 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:06,299 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 1795 flow [2024-06-27 21:05:06,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1795, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-06-27 21:05:06,300 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-27 21:05:06,300 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 1795 flow [2024-06-27 21:05:06,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:06,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:06,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:05:06,301 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 21:05:06,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1912079770, now seen corresponding path program 1 times [2024-06-27 21:05:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:06,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252738144] [2024-06-27 21:05:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:06,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:06,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252738144] [2024-06-27 21:05:06,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252738144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:06,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:06,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612621205] [2024-06-27 21:05:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:06,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:06,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:06,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 1795 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:06,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:06,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:06,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:07,537 INFO L124 PetriNetUnfolderBase]: 2092/3109 cut-off events. [2024-06-27 21:05:07,537 INFO L125 PetriNetUnfolderBase]: For 60228/60228 co-relation queries the response was YES. [2024-06-27 21:05:07,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20863 conditions, 3109 events. 2092/3109 cut-off events. For 60228/60228 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14299 event pairs, 538 based on Foata normal form. 6/3113 useless extension candidates. Maximal degree in co-relation 20798. Up to 2855 conditions per place. [2024-06-27 21:05:07,560 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 156 selfloop transitions, 41 changer transitions 0/200 dead transitions. [2024-06-27 21:05:07,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 200 transitions, 2415 flow [2024-06-27 21:05:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:05:07,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:05:07,562 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 1795 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:05:07,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 200 transitions, 2415 flow [2024-06-27 21:05:07,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 200 transitions, 2348 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:07,625 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1911 flow [2024-06-27 21:05:07,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1911, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2024-06-27 21:05:07,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-27 21:05:07,626 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1911 flow [2024-06-27 21:05:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:07,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:07,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:05:07,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:07,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -708351386, now seen corresponding path program 2 times [2024-06-27 21:05:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630257551] [2024-06-27 21:05:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:08,268 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 21:05:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630257551] [2024-06-27 21:05:08,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630257551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:08,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:08,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434027802] [2024-06-27 21:05:08,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:08,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:08,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1911 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:08,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:08,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:08,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:08,931 INFO L124 PetriNetUnfolderBase]: 2135/3176 cut-off events. [2024-06-27 21:05:08,931 INFO L125 PetriNetUnfolderBase]: For 66687/66699 co-relation queries the response was YES. [2024-06-27 21:05:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21716 conditions, 3176 events. 2135/3176 cut-off events. For 66687/66699 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14658 event pairs, 541 based on Foata normal form. 6/3175 useless extension candidates. Maximal degree in co-relation 21649. Up to 2748 conditions per place. [2024-06-27 21:05:08,956 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 143 selfloop transitions, 66 changer transitions 0/212 dead transitions. [2024-06-27 21:05:08,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 212 transitions, 2717 flow [2024-06-27 21:05:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:05:08,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 21:05:08,957 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1911 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:05:08,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 212 transitions, 2717 flow [2024-06-27 21:05:09,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 212 transitions, 2642 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:09,039 INFO L231 Difference]: Finished difference. Result has 141 places, 182 transitions, 2184 flow [2024-06-27 21:05:09,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2184, PETRI_PLACES=141, PETRI_TRANSITIONS=182} [2024-06-27 21:05:09,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-27 21:05:09,040 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 182 transitions, 2184 flow [2024-06-27 21:05:09,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:09,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:09,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:05:09,040 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 21:05:09,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash -708618296, now seen corresponding path program 3 times [2024-06-27 21:05:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:09,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87589936] [2024-06-27 21:05:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:09,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:09,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87589936] [2024-06-27 21:05:09,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87589936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:09,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:09,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902285018] [2024-06-27 21:05:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:09,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 182 transitions, 2184 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:10,378 INFO L124 PetriNetUnfolderBase]: 2206/3280 cut-off events. [2024-06-27 21:05:10,378 INFO L125 PetriNetUnfolderBase]: For 76638/76650 co-relation queries the response was YES. [2024-06-27 21:05:10,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23532 conditions, 3280 events. 2206/3280 cut-off events. For 76638/76650 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15218 event pairs, 543 based on Foata normal form. 10/3283 useless extension candidates. Maximal degree in co-relation 23462. Up to 2921 conditions per place. [2024-06-27 21:05:10,407 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 157 selfloop transitions, 60 changer transitions 0/220 dead transitions. [2024-06-27 21:05:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2981 flow [2024-06-27 21:05:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:05:10,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:05:10,409 INFO L175 Difference]: Start difference. First operand has 141 places, 182 transitions, 2184 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:05:10,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2981 flow [2024-06-27 21:05:10,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 2889 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 21:05:10,507 INFO L231 Difference]: Finished difference. Result has 147 places, 189 transitions, 2335 flow [2024-06-27 21:05:10,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2335, PETRI_PLACES=147, PETRI_TRANSITIONS=189} [2024-06-27 21:05:10,507 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-27 21:05:10,508 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 189 transitions, 2335 flow [2024-06-27 21:05:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:10,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:05:10,508 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 21:05:10,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash -715975743, now seen corresponding path program 4 times [2024-06-27 21:05:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033232516] [2024-06-27 21:05:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:11,071 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 21:05:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033232516] [2024-06-27 21:05:11,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033232516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:11,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:11,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:11,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458619421] [2024-06-27 21:05:11,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:11,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:11,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:11,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:11,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 189 transitions, 2335 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:11,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:11,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:11,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:11,624 INFO L124 PetriNetUnfolderBase]: 2228/3312 cut-off events. [2024-06-27 21:05:11,624 INFO L125 PetriNetUnfolderBase]: For 82537/82549 co-relation queries the response was YES. [2024-06-27 21:05:11,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24173 conditions, 3312 events. 2228/3312 cut-off events. For 82537/82549 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15439 event pairs, 552 based on Foata normal form. 8/3313 useless extension candidates. Maximal degree in co-relation 24101. Up to 2755 conditions per place. [2024-06-27 21:05:11,652 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 153 selfloop transitions, 72 changer transitions 0/228 dead transitions. [2024-06-27 21:05:11,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 228 transitions, 3232 flow [2024-06-27 21:05:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:05:11,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 21:05:11,660 INFO L175 Difference]: Start difference. First operand has 147 places, 189 transitions, 2335 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:05:11,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 228 transitions, 3232 flow [2024-06-27 21:05:11,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 228 transitions, 3084 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:11,770 INFO L231 Difference]: Finished difference. Result has 151 places, 195 transitions, 2448 flow [2024-06-27 21:05:11,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2448, PETRI_PLACES=151, PETRI_TRANSITIONS=195} [2024-06-27 21:05:11,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-27 21:05:11,771 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 195 transitions, 2448 flow [2024-06-27 21:05:11,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:05:11,772 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 21:05:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 847171154, now seen corresponding path program 4 times [2024-06-27 21:05:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127998043] [2024-06-27 21:05:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:12,405 INFO 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 21:05:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:12,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127998043] [2024-06-27 21:05:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127998043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:12,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:12,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322985615] [2024-06-27 21:05:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:12,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:12,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 195 transitions, 2448 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:12,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:12,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:12,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:13,049 INFO L124 PetriNetUnfolderBase]: 2219/3301 cut-off events. [2024-06-27 21:05:13,049 INFO L125 PetriNetUnfolderBase]: For 87493/87505 co-relation queries the response was YES. [2024-06-27 21:05:13,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24527 conditions, 3301 events. 2219/3301 cut-off events. For 87493/87505 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15406 event pairs, 554 based on Foata normal form. 10/3304 useless extension candidates. Maximal degree in co-relation 24453. Up to 2919 conditions per place. [2024-06-27 21:05:13,078 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 166 selfloop transitions, 59 changer transitions 0/228 dead transitions. [2024-06-27 21:05:13,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 3272 flow [2024-06-27 21:05:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:05:13,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 21:05:13,080 INFO L175 Difference]: Start difference. First operand has 151 places, 195 transitions, 2448 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:05:13,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 3272 flow [2024-06-27 21:05:13,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 3091 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:13,199 INFO L231 Difference]: Finished difference. Result has 155 places, 195 transitions, 2396 flow [2024-06-27 21:05:13,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=155, PETRI_TRANSITIONS=195} [2024-06-27 21:05:13,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-27 21:05:13,199 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 195 transitions, 2396 flow [2024-06-27 21:05:13,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:13,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:13,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:13,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:05:13,200 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:13,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash 847170937, now seen corresponding path program 5 times [2024-06-27 21:05:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:13,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646450680] [2024-06-27 21:05:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:13,745 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 21:05:13,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:13,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646450680] [2024-06-27 21:05:13,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646450680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:13,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:13,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:13,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175115128] [2024-06-27 21:05:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:13,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:13,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:13,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:13,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:13,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 195 transitions, 2396 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:13,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:13,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:13,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:14,313 INFO L124 PetriNetUnfolderBase]: 2225/3309 cut-off events. [2024-06-27 21:05:14,313 INFO L125 PetriNetUnfolderBase]: For 91954/91966 co-relation queries the response was YES. [2024-06-27 21:05:14,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24352 conditions, 3309 events. 2225/3309 cut-off events. For 91954/91966 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15427 event pairs, 559 based on Foata normal form. 12/3314 useless extension candidates. Maximal degree in co-relation 24277. Up to 2759 conditions per place. [2024-06-27 21:05:14,343 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 156 selfloop transitions, 70 changer transitions 0/229 dead transitions. [2024-06-27 21:05:14,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 229 transitions, 3160 flow [2024-06-27 21:05:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:05:14,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:05:14,346 INFO L175 Difference]: Start difference. First operand has 155 places, 195 transitions, 2396 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:05:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 229 transitions, 3160 flow [2024-06-27 21:05:14,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 229 transitions, 2966 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:14,473 INFO L231 Difference]: Finished difference. Result has 156 places, 198 transitions, 2384 flow [2024-06-27 21:05:14,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=156, PETRI_TRANSITIONS=198} [2024-06-27 21:05:14,475 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-27 21:05:14,475 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 198 transitions, 2384 flow [2024-06-27 21:05:14,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:14,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:14,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:05:14,476 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:14,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 854522587, now seen corresponding path program 6 times [2024-06-27 21:05:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:14,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792263651] [2024-06-27 21:05:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:14,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:15,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792263651] [2024-06-27 21:05:15,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792263651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:15,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:15,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:05:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29033050] [2024-06-27 21:05:15,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:15,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:05:15,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:15,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:05:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:05:15,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:15,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 198 transitions, 2384 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:15,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:15,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:15,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:15,602 INFO L124 PetriNetUnfolderBase]: 2199/3271 cut-off events. [2024-06-27 21:05:15,602 INFO L125 PetriNetUnfolderBase]: For 94303/94315 co-relation queries the response was YES. [2024-06-27 21:05:15,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24047 conditions, 3271 events. 2199/3271 cut-off events. For 94303/94315 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15178 event pairs, 543 based on Foata normal form. 12/3276 useless extension candidates. Maximal degree in co-relation 23971. Up to 2739 conditions per place. [2024-06-27 21:05:15,630 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 149 selfloop transitions, 75 changer transitions 0/227 dead transitions. [2024-06-27 21:05:15,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 227 transitions, 3014 flow [2024-06-27 21:05:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:05:15,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:05:15,632 INFO L175 Difference]: Start difference. First operand has 156 places, 198 transitions, 2384 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:05:15,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 227 transitions, 3014 flow [2024-06-27 21:05:15,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2863 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:15,743 INFO L231 Difference]: Finished difference. Result has 159 places, 198 transitions, 2396 flow [2024-06-27 21:05:15,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=159, PETRI_TRANSITIONS=198} [2024-06-27 21:05:15,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 21:05:15,744 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 198 transitions, 2396 flow [2024-06-27 21:05:15,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:15,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:15,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:05:15,745 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 21:05:15,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1426608859, now seen corresponding path program 1 times [2024-06-27 21:05:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:15,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302613291] [2024-06-27 21:05:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:16,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302613291] [2024-06-27 21:05:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302613291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:16,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:16,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:05:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250585432] [2024-06-27 21:05:16,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:05:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:05:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:05:16,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:16,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 198 transitions, 2396 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:16,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:16,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:16,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:16,688 INFO L124 PetriNetUnfolderBase]: 2135/3170 cut-off events. [2024-06-27 21:05:16,688 INFO L125 PetriNetUnfolderBase]: For 94317/94341 co-relation queries the response was YES. [2024-06-27 21:05:16,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23511 conditions, 3170 events. 2135/3170 cut-off events. For 94317/94341 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14688 event pairs, 548 based on Foata normal form. 20/3186 useless extension candidates. Maximal degree in co-relation 23434. Up to 3113 conditions per place. [2024-06-27 21:05:16,715 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 183 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2024-06-27 21:05:16,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 206 transitions, 2822 flow [2024-06-27 21:05:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:05:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:05:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-27 21:05:16,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-27 21:05:16,716 INFO L175 Difference]: Start difference. First operand has 159 places, 198 transitions, 2396 flow. Second operand 5 states and 83 transitions. [2024-06-27 21:05:16,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 206 transitions, 2822 flow [2024-06-27 21:05:16,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 206 transitions, 2660 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:16,849 INFO L231 Difference]: Finished difference. Result has 157 places, 198 transitions, 2285 flow [2024-06-27 21:05:16,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2285, PETRI_PLACES=157, PETRI_TRANSITIONS=198} [2024-06-27 21:05:16,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-27 21:05:16,850 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 198 transitions, 2285 flow [2024-06-27 21:05:16,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:16,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:16,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:16,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:05:16,850 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:16,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash 709782774, now seen corresponding path program 1 times [2024-06-27 21:05:16,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:16,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565700838] [2024-06-27 21:05:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:17,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565700838] [2024-06-27 21:05:17,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565700838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:17,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:17,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106031805] [2024-06-27 21:05:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:17,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:17,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:17,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:17,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 198 transitions, 2285 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:17,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:17,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:17,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:18,226 INFO L124 PetriNetUnfolderBase]: 2192/3282 cut-off events. [2024-06-27 21:05:18,226 INFO L125 PetriNetUnfolderBase]: For 108392/108425 co-relation queries the response was YES. [2024-06-27 21:05:18,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24623 conditions, 3282 events. 2192/3282 cut-off events. For 108392/108425 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15562 event pairs, 503 based on Foata normal form. 11/3234 useless extension candidates. Maximal degree in co-relation 24545. Up to 2919 conditions per place. [2024-06-27 21:05:18,254 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 176 selfloop transitions, 56 changer transitions 0/267 dead transitions. [2024-06-27 21:05:18,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 267 transitions, 3346 flow [2024-06-27 21:05:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:05:18,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 21:05:18,256 INFO L175 Difference]: Start difference. First operand has 157 places, 198 transitions, 2285 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:05:18,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 267 transitions, 3346 flow [2024-06-27 21:05:18,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 267 transitions, 3284 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:18,369 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 2793 flow [2024-06-27 21:05:18,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2793, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-27 21:05:18,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 21:05:18,370 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 2793 flow [2024-06-27 21:05:18,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:18,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:18,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:18,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:05:18,370 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 21:05:18,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 736738166, now seen corresponding path program 2 times [2024-06-27 21:05:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:18,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126214961] [2024-06-27 21:05:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126214961] [2024-06-27 21:05:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126214961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:19,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:19,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:19,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527118228] [2024-06-27 21:05:19,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:19,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:19,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 2793 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:19,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:19,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:19,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:19,958 INFO L124 PetriNetUnfolderBase]: 2273/3411 cut-off events. [2024-06-27 21:05:19,959 INFO L125 PetriNetUnfolderBase]: For 121111/121161 co-relation queries the response was YES. [2024-06-27 21:05:19,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26042 conditions, 3411 events. 2273/3411 cut-off events. For 121111/121161 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16351 event pairs, 364 based on Foata normal form. 37/3387 useless extension candidates. Maximal degree in co-relation 25961. Up to 2868 conditions per place. [2024-06-27 21:05:20,096 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 176 selfloop transitions, 63 changer transitions 0/274 dead transitions. [2024-06-27 21:05:20,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 274 transitions, 3599 flow [2024-06-27 21:05:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 21:05:20,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-27 21:05:20,098 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 2793 flow. Second operand 8 states and 157 transitions. [2024-06-27 21:05:20,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 274 transitions, 3599 flow [2024-06-27 21:05:20,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 274 transitions, 3504 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:20,212 INFO L231 Difference]: Finished difference. Result has 171 places, 230 transitions, 2920 flow [2024-06-27 21:05:20,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2920, PETRI_PLACES=171, PETRI_TRANSITIONS=230} [2024-06-27 21:05:20,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-27 21:05:20,213 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 230 transitions, 2920 flow [2024-06-27 21:05:20,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:20,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:20,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:05:20,214 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 21:05:20,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1233177762, now seen corresponding path program 1 times [2024-06-27 21:05:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126441613] [2024-06-27 21:05:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:20,971 INFO 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 21:05:20,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:20,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126441613] [2024-06-27 21:05:20,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126441613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:20,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:20,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:20,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247986415] [2024-06-27 21:05:20,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:20,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 230 transitions, 2920 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:21,717 INFO L124 PetriNetUnfolderBase]: 2360/3519 cut-off events. [2024-06-27 21:05:21,717 INFO L125 PetriNetUnfolderBase]: For 114803/114807 co-relation queries the response was YES. [2024-06-27 21:05:21,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27087 conditions, 3519 events. 2360/3519 cut-off events. For 114803/114807 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16705 event pairs, 543 based on Foata normal form. 6/3523 useless extension candidates. Maximal degree in co-relation 27004. Up to 3334 conditions per place. [2024-06-27 21:05:21,746 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 225 selfloop transitions, 33 changer transitions 0/261 dead transitions. [2024-06-27 21:05:21,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 3542 flow [2024-06-27 21:05:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:05:21,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:05:21,747 INFO L175 Difference]: Start difference. First operand has 171 places, 230 transitions, 2920 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:05:21,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 3542 flow [2024-06-27 21:05:21,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 261 transitions, 3394 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:21,888 INFO L231 Difference]: Finished difference. Result has 174 places, 230 transitions, 2850 flow [2024-06-27 21:05:21,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=174, PETRI_TRANSITIONS=230} [2024-06-27 21:05:21,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 21:05:21,889 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 230 transitions, 2850 flow [2024-06-27 21:05:21,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:21,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:21,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:21,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:05:21,889 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:21,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:21,890 INFO L85 PathProgramCache]: Analyzing trace with hash 736798616, now seen corresponding path program 3 times [2024-06-27 21:05:21,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242627862] [2024-06-27 21:05:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:22,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242627862] [2024-06-27 21:05:22,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242627862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:22,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:22,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255510153] [2024-06-27 21:05:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:22,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:22,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:22,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 230 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:22,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:22,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:22,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:23,471 INFO L124 PetriNetUnfolderBase]: 2321/3491 cut-off events. [2024-06-27 21:05:23,471 INFO L125 PetriNetUnfolderBase]: For 129123/129182 co-relation queries the response was YES. [2024-06-27 21:05:23,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26918 conditions, 3491 events. 2321/3491 cut-off events. For 129123/129182 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16910 event pairs, 496 based on Foata normal form. 28/3461 useless extension candidates. Maximal degree in co-relation 26834. Up to 2995 conditions per place. [2024-06-27 21:05:23,503 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 172 selfloop transitions, 67 changer transitions 0/274 dead transitions. [2024-06-27 21:05:23,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 274 transitions, 3626 flow [2024-06-27 21:05:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:05:23,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 21:05:23,505 INFO L175 Difference]: Start difference. First operand has 174 places, 230 transitions, 2850 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:05:23,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 274 transitions, 3626 flow [2024-06-27 21:05:23,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 274 transitions, 3536 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:23,639 INFO L231 Difference]: Finished difference. Result has 176 places, 232 transitions, 2950 flow [2024-06-27 21:05:23,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2950, PETRI_PLACES=176, PETRI_TRANSITIONS=232} [2024-06-27 21:05:23,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-27 21:05:23,640 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 232 transitions, 2950 flow [2024-06-27 21:05:23,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:23,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:23,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:23,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:05:23,640 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 21:05:23,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 855070994, now seen corresponding path program 1 times [2024-06-27 21:05:23,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:23,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852411068] [2024-06-27 21:05:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:24,368 INFO 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 21:05:24,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852411068] [2024-06-27 21:05:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852411068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:24,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7355295] [2024-06-27 21:05:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:24,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:24,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 232 transitions, 2950 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:24,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:24,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:24,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:25,162 INFO L124 PetriNetUnfolderBase]: 2446/3653 cut-off events. [2024-06-27 21:05:25,163 INFO L125 PetriNetUnfolderBase]: For 124704/124708 co-relation queries the response was YES. [2024-06-27 21:05:25,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28066 conditions, 3653 events. 2446/3653 cut-off events. For 124704/124708 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17556 event pairs, 562 based on Foata normal form. 8/3659 useless extension candidates. Maximal degree in co-relation 27981. Up to 3565 conditions per place. [2024-06-27 21:05:25,201 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-27 21:05:25,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 268 transitions, 3630 flow [2024-06-27 21:05:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:05:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:05:25,203 INFO L175 Difference]: Start difference. First operand has 176 places, 232 transitions, 2950 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:05:25,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 268 transitions, 3630 flow [2024-06-27 21:05:25,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 268 transitions, 3484 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:25,387 INFO L231 Difference]: Finished difference. Result has 180 places, 236 transitions, 2913 flow [2024-06-27 21:05:25,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2913, PETRI_PLACES=180, PETRI_TRANSITIONS=236} [2024-06-27 21:05:25,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-27 21:05:25,388 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 236 transitions, 2913 flow [2024-06-27 21:05:25,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:25,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:25,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:25,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:05:25,388 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 21:05:25,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash 854886296, now seen corresponding path program 4 times [2024-06-27 21:05:25,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:25,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266203800] [2024-06-27 21:05:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:25,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:26,163 INFO 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 21:05:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266203800] [2024-06-27 21:05:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266203800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213630623] [2024-06-27 21:05:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:26,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:26,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 236 transitions, 2913 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:26,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:26,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:26,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:26,987 INFO L124 PetriNetUnfolderBase]: 2412/3640 cut-off events. [2024-06-27 21:05:26,988 INFO L125 PetriNetUnfolderBase]: For 146414/146476 co-relation queries the response was YES. [2024-06-27 21:05:27,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28437 conditions, 3640 events. 2412/3640 cut-off events. For 146414/146476 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17831 event pairs, 501 based on Foata normal form. 27/3601 useless extension candidates. Maximal degree in co-relation 28350. Up to 3068 conditions per place. [2024-06-27 21:05:27,019 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 165 selfloop transitions, 77 changer transitions 0/279 dead transitions. [2024-06-27 21:05:27,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 279 transitions, 3767 flow [2024-06-27 21:05:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 21:05:27,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 21:05:27,021 INFO L175 Difference]: Start difference. First operand has 180 places, 236 transitions, 2913 flow. Second operand 8 states and 156 transitions. [2024-06-27 21:05:27,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 279 transitions, 3767 flow [2024-06-27 21:05:27,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 279 transitions, 3702 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:27,169 INFO L231 Difference]: Finished difference. Result has 182 places, 238 transitions, 3059 flow [2024-06-27 21:05:27,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3059, PETRI_PLACES=182, PETRI_TRANSITIONS=238} [2024-06-27 21:05:27,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 21:05:27,170 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 238 transitions, 3059 flow [2024-06-27 21:05:27,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:27,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:27,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:27,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:05:27,170 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 21:05:27,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash -720230126, now seen corresponding path program 2 times [2024-06-27 21:05:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:27,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659301018] [2024-06-27 21:05:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:27,837 INFO 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 21:05:27,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:27,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659301018] [2024-06-27 21:05:27,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659301018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:27,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:27,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:27,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789393760] [2024-06-27 21:05:27,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:27,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:27,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:27,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 238 transitions, 3059 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:27,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:27,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:27,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:28,608 INFO L124 PetriNetUnfolderBase]: 2620/3941 cut-off events. [2024-06-27 21:05:28,608 INFO L125 PetriNetUnfolderBase]: For 153262/153286 co-relation queries the response was YES. [2024-06-27 21:05:28,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30353 conditions, 3941 events. 2620/3941 cut-off events. For 153262/153286 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19436 event pairs, 597 based on Foata normal form. 32/3959 useless extension candidates. Maximal degree in co-relation 30265. Up to 3366 conditions per place. [2024-06-27 21:05:28,646 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 205 selfloop transitions, 68 changer transitions 0/276 dead transitions. [2024-06-27 21:05:28,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 276 transitions, 3787 flow [2024-06-27 21:05:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:05:28,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:05:28,648 INFO L175 Difference]: Start difference. First operand has 182 places, 238 transitions, 3059 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:05:28,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 276 transitions, 3787 flow [2024-06-27 21:05:28,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 276 transitions, 3614 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:28,822 INFO L231 Difference]: Finished difference. Result has 185 places, 240 transitions, 3072 flow [2024-06-27 21:05:28,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3072, PETRI_PLACES=185, PETRI_TRANSITIONS=240} [2024-06-27 21:05:28,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 21:05:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 240 transitions, 3072 flow [2024-06-27 21:05:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:28,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:28,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:28,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:05:28,823 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 21:05:28,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash -720414824, now seen corresponding path program 5 times [2024-06-27 21:05:28,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:28,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930884352] [2024-06-27 21:05:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:29,567 INFO 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 21:05:29,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:29,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930884352] [2024-06-27 21:05:29,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930884352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:29,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:29,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:29,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109381100] [2024-06-27 21:05:29,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:29,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:29,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:29,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:29,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:05:29,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 240 transitions, 3072 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:29,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:29,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:05:29,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:30,386 INFO L124 PetriNetUnfolderBase]: 2549/3871 cut-off events. [2024-06-27 21:05:30,386 INFO L125 PetriNetUnfolderBase]: For 163076/163160 co-relation queries the response was YES. [2024-06-27 21:05:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30242 conditions, 3871 events. 2549/3871 cut-off events. For 163076/163160 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19428 event pairs, 534 based on Foata normal form. 31/3824 useless extension candidates. Maximal degree in co-relation 30153. Up to 3102 conditions per place. [2024-06-27 21:05:30,422 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 84 changer transitions 0/282 dead transitions. [2024-06-27 21:05:30,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4024 flow [2024-06-27 21:05:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:05:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:05:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:05:30,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-27 21:05:30,423 INFO L175 Difference]: Start difference. First operand has 185 places, 240 transitions, 3072 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:05:30,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4024 flow [2024-06-27 21:05:30,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 282 transitions, 3868 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:30,591 INFO L231 Difference]: Finished difference. Result has 186 places, 242 transitions, 3145 flow [2024-06-27 21:05:30,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3145, PETRI_PLACES=186, PETRI_TRANSITIONS=242} [2024-06-27 21:05:30,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 21:05:30,592 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 242 transitions, 3145 flow [2024-06-27 21:05:30,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:30,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:30,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:30,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:05:30,593 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:30,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 3 times [2024-06-27 21:05:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:30,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794589468] [2024-06-27 21:05:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:31,301 INFO 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 21:05:31,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:31,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794589468] [2024-06-27 21:05:31,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794589468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:31,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:31,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:31,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773630616] [2024-06-27 21:05:31,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:31,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:31,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:31,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 242 transitions, 3145 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:31,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:31,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:32,053 INFO L124 PetriNetUnfolderBase]: 2684/4041 cut-off events. [2024-06-27 21:05:32,054 INFO L125 PetriNetUnfolderBase]: For 155018/155048 co-relation queries the response was YES. [2024-06-27 21:05:32,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31434 conditions, 4041 events. 2684/4041 cut-off events. For 155018/155048 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20110 event pairs, 590 based on Foata normal form. 24/4059 useless extension candidates. Maximal degree in co-relation 31344. Up to 3782 conditions per place. [2024-06-27 21:05:32,093 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 229 selfloop transitions, 52 changer transitions 0/284 dead transitions. [2024-06-27 21:05:32,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 284 transitions, 4065 flow [2024-06-27 21:05:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:05:32,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:05:32,095 INFO L175 Difference]: Start difference. First operand has 186 places, 242 transitions, 3145 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:05:32,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 284 transitions, 4065 flow [2024-06-27 21:05:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 284 transitions, 3874 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:32,300 INFO L231 Difference]: Finished difference. Result has 191 places, 251 transitions, 3228 flow [2024-06-27 21:05:32,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3228, PETRI_PLACES=191, PETRI_TRANSITIONS=251} [2024-06-27 21:05:32,301 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-27 21:05:32,301 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 251 transitions, 3228 flow [2024-06-27 21:05:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:32,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:32,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:32,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:05:32,302 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:32,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:32,302 INFO L85 PathProgramCache]: Analyzing trace with hash 728679078, now seen corresponding path program 4 times [2024-06-27 21:05:32,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:32,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955773650] [2024-06-27 21:05:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:32,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955773650] [2024-06-27 21:05:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955773650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:33,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939306410] [2024-06-27 21:05:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:33,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:33,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:33,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 251 transitions, 3228 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:33,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:33,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:33,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:33,876 INFO L124 PetriNetUnfolderBase]: 2676/4029 cut-off events. [2024-06-27 21:05:33,876 INFO L125 PetriNetUnfolderBase]: For 157096/157126 co-relation queries the response was YES. [2024-06-27 21:05:33,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31235 conditions, 4029 events. 2676/4029 cut-off events. For 157096/157126 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20043 event pairs, 623 based on Foata normal form. 24/4047 useless extension candidates. Maximal degree in co-relation 31142. Up to 3853 conditions per place. [2024-06-27 21:05:33,916 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 46 changer transitions 0/285 dead transitions. [2024-06-27 21:05:33,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 285 transitions, 3900 flow [2024-06-27 21:05:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:05:33,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:05:33,917 INFO L175 Difference]: Start difference. First operand has 191 places, 251 transitions, 3228 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:05:33,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 285 transitions, 3900 flow [2024-06-27 21:05:34,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 285 transitions, 3789 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:34,144 INFO L231 Difference]: Finished difference. Result has 197 places, 251 transitions, 3217 flow [2024-06-27 21:05:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3217, PETRI_PLACES=197, PETRI_TRANSITIONS=251} [2024-06-27 21:05:34,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-27 21:05:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 251 transitions, 3217 flow [2024-06-27 21:05:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 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 21:05:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:05:34,145 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 21:05:34,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1871015996, now seen corresponding path program 1 times [2024-06-27 21:05:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214873948] [2024-06-27 21:05:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214873948] [2024-06-27 21:05:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214873948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:34,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151702425] [2024-06-27 21:05:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:35,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:35,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 251 transitions, 3217 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:35,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:35,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:35,884 INFO L124 PetriNetUnfolderBase]: 2693/4054 cut-off events. [2024-06-27 21:05:35,884 INFO L125 PetriNetUnfolderBase]: For 160631/160635 co-relation queries the response was YES. [2024-06-27 21:05:35,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31497 conditions, 4054 events. 2693/4054 cut-off events. For 160631/160635 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20094 event pairs, 445 based on Foata normal form. 8/4060 useless extension candidates. Maximal degree in co-relation 31402. Up to 3811 conditions per place. [2024-06-27 21:05:35,925 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 263 selfloop transitions, 29 changer transitions 0/295 dead transitions. [2024-06-27 21:05:35,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 295 transitions, 4039 flow [2024-06-27 21:05:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:05:35,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:05:35,927 INFO L175 Difference]: Start difference. First operand has 197 places, 251 transitions, 3217 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:05:35,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 295 transitions, 4039 flow [2024-06-27 21:05:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 295 transitions, 3943 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:36,192 INFO L231 Difference]: Finished difference. Result has 201 places, 259 transitions, 3336 flow [2024-06-27 21:05:36,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3336, PETRI_PLACES=201, PETRI_TRANSITIONS=259} [2024-06-27 21:05:36,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-27 21:05:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 259 transitions, 3336 flow [2024-06-27 21:05:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:36,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:05:36,194 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 21:05:36,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash -315572846, now seen corresponding path program 2 times [2024-06-27 21:05:36,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:36,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897437540] [2024-06-27 21:05:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:37,003 INFO 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 21:05:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897437540] [2024-06-27 21:05:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897437540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:37,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:37,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807382056] [2024-06-27 21:05:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:37,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:37,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:37,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 259 transitions, 3336 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:37,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:37,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:37,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:37,932 INFO L124 PetriNetUnfolderBase]: 2735/4120 cut-off events. [2024-06-27 21:05:37,932 INFO L125 PetriNetUnfolderBase]: For 173248/173252 co-relation queries the response was YES. [2024-06-27 21:05:37,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32558 conditions, 4120 events. 2735/4120 cut-off events. For 173248/173252 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20608 event pairs, 566 based on Foata normal form. 8/4126 useless extension candidates. Maximal degree in co-relation 32460. Up to 3860 conditions per place. [2024-06-27 21:05:37,971 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 263 selfloop transitions, 36 changer transitions 0/302 dead transitions. [2024-06-27 21:05:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 302 transitions, 4302 flow [2024-06-27 21:05:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:05:37,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 21:05:37,973 INFO L175 Difference]: Start difference. First operand has 201 places, 259 transitions, 3336 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:05:37,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 302 transitions, 4302 flow [2024-06-27 21:05:38,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 302 transitions, 4193 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:38,253 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 3417 flow [2024-06-27 21:05:38,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3417, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-27 21:05:38,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-27 21:05:38,253 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 3417 flow [2024-06-27 21:05:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:38,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:38,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:38,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:05:38,254 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 21:05:38,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1365925994, now seen corresponding path program 3 times [2024-06-27 21:05:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:38,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282061496] [2024-06-27 21:05:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:39,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282061496] [2024-06-27 21:05:39,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282061496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:39,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:39,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520602135] [2024-06-27 21:05:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:39,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:39,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:39,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 3417 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:39,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:39,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:39,946 INFO L124 PetriNetUnfolderBase]: 2727/4108 cut-off events. [2024-06-27 21:05:39,947 INFO L125 PetriNetUnfolderBase]: For 179007/179011 co-relation queries the response was YES. [2024-06-27 21:05:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32583 conditions, 4108 events. 2727/4108 cut-off events. For 179007/179011 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20448 event pairs, 566 based on Foata normal form. 8/4114 useless extension candidates. Maximal degree in co-relation 32482. Up to 3900 conditions per place. [2024-06-27 21:05:39,992 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 263 selfloop transitions, 35 changer transitions 0/301 dead transitions. [2024-06-27 21:05:39,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 301 transitions, 4158 flow [2024-06-27 21:05:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:05:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 21:05:39,993 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 3417 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:05:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 301 transitions, 4158 flow [2024-06-27 21:05:40,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 301 transitions, 4011 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:40,313 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 3375 flow [2024-06-27 21:05:40,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3375, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-06-27 21:05:40,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-27 21:05:40,314 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 3375 flow [2024-06-27 21:05:40,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:40,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:40,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:40,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:05:40,315 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:40,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash -339351596, now seen corresponding path program 1 times [2024-06-27 21:05:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:40,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667437991] [2024-06-27 21:05:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:40,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:41,080 INFO 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 21:05:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667437991] [2024-06-27 21:05:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667437991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:41,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:41,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135961252] [2024-06-27 21:05:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:41,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:41,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:41,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:41,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 3375 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:41,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:41,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:42,108 INFO L124 PetriNetUnfolderBase]: 2841/4293 cut-off events. [2024-06-27 21:05:42,108 INFO L125 PetriNetUnfolderBase]: For 198945/198951 co-relation queries the response was YES. [2024-06-27 21:05:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33501 conditions, 4293 events. 2841/4293 cut-off events. For 198945/198951 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21779 event pairs, 570 based on Foata normal form. 26/4317 useless extension candidates. Maximal degree in co-relation 33398. Up to 3974 conditions per place. [2024-06-27 21:05:42,151 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 279 selfloop transitions, 34 changer transitions 0/316 dead transitions. [2024-06-27 21:05:42,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 316 transitions, 4240 flow [2024-06-27 21:05:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:05:42,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:05:42,153 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 3375 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:05:42,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 316 transitions, 4240 flow [2024-06-27 21:05:42,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 4172 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:42,476 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 3466 flow [2024-06-27 21:05:42,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3466, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-27 21:05:42,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-27 21:05:42,477 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 3466 flow [2024-06-27 21:05:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:42,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:42,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:05:42,478 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:42,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1060442724, now seen corresponding path program 4 times [2024-06-27 21:05:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:42,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817195737] [2024-06-27 21:05:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:42,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:43,366 INFO 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 21:05:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:43,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817195737] [2024-06-27 21:05:43,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817195737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:43,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:43,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:43,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20401352] [2024-06-27 21:05:43,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:43,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:43,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:43,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 3466 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:43,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:43,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:44,470 INFO L124 PetriNetUnfolderBase]: 2858/4321 cut-off events. [2024-06-27 21:05:44,470 INFO L125 PetriNetUnfolderBase]: For 194725/194727 co-relation queries the response was YES. [2024-06-27 21:05:44,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34065 conditions, 4321 events. 2858/4321 cut-off events. For 194725/194727 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21959 event pairs, 585 based on Foata normal form. 6/4325 useless extension candidates. Maximal degree in co-relation 33960. Up to 4034 conditions per place. [2024-06-27 21:05:44,520 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 258 selfloop transitions, 45 changer transitions 0/306 dead transitions. [2024-06-27 21:05:44,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 306 transitions, 4228 flow [2024-06-27 21:05:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:05:44,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 21:05:44,533 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 3466 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:05:44,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 306 transitions, 4228 flow [2024-06-27 21:05:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 306 transitions, 4154 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:44,899 INFO L231 Difference]: Finished difference. Result has 217 places, 273 transitions, 3541 flow [2024-06-27 21:05:44,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3541, PETRI_PLACES=217, PETRI_TRANSITIONS=273} [2024-06-27 21:05:44,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 21:05:44,900 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 273 transitions, 3541 flow [2024-06-27 21:05:44,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:44,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:44,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:44,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:05:44,900 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:44,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:44,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1060446444, now seen corresponding path program 5 times [2024-06-27 21:05:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:44,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007055560] [2024-06-27 21:05:44,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:44,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:45,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007055560] [2024-06-27 21:05:45,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007055560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:45,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:45,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:45,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155592716] [2024-06-27 21:05:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:45,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:45,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 273 transitions, 3541 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:45,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:45,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:45,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:46,702 INFO L124 PetriNetUnfolderBase]: 2900/4387 cut-off events. [2024-06-27 21:05:46,702 INFO L125 PetriNetUnfolderBase]: For 208389/208391 co-relation queries the response was YES. [2024-06-27 21:05:46,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35032 conditions, 4387 events. 2900/4387 cut-off events. For 208389/208391 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22413 event pairs, 585 based on Foata normal form. 6/4391 useless extension candidates. Maximal degree in co-relation 34926. Up to 4035 conditions per place. [2024-06-27 21:05:46,741 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 261 selfloop transitions, 49 changer transitions 0/313 dead transitions. [2024-06-27 21:05:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4553 flow [2024-06-27 21:05:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:05:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:05:46,742 INFO L175 Difference]: Start difference. First operand has 217 places, 273 transitions, 3541 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:05:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4553 flow [2024-06-27 21:05:47,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4418 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:47,064 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 3643 flow [2024-06-27 21:05:47,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3643, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-27 21:05:47,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-27 21:05:47,064 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 3643 flow [2024-06-27 21:05:47,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:47,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:47,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:05:47,065 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:47,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 731826880, now seen corresponding path program 2 times [2024-06-27 21:05:47,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:47,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747519728] [2024-06-27 21:05:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:47,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:47,854 INFO 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 21:05:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747519728] [2024-06-27 21:05:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747519728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:47,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:47,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916635725] [2024-06-27 21:05:47,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:47,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:47,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 3643 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:48,867 INFO L124 PetriNetUnfolderBase]: 2997/4544 cut-off events. [2024-06-27 21:05:48,867 INFO L125 PetriNetUnfolderBase]: For 234625/234627 co-relation queries the response was YES. [2024-06-27 21:05:48,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36253 conditions, 4544 events. 2997/4544 cut-off events. For 234625/234627 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23521 event pairs, 602 based on Foata normal form. 22/4564 useless extension candidates. Maximal degree in co-relation 36145. Up to 4026 conditions per place. [2024-06-27 21:05:48,917 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 57 changer transitions 0/324 dead transitions. [2024-06-27 21:05:48,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 324 transitions, 4508 flow [2024-06-27 21:05:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:05:48,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-27 21:05:48,918 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 3643 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:05:48,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 324 transitions, 4508 flow [2024-06-27 21:05:49,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 324 transitions, 4376 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 21:05:49,302 INFO L231 Difference]: Finished difference. Result has 225 places, 282 transitions, 3697 flow [2024-06-27 21:05:49,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3697, PETRI_PLACES=225, PETRI_TRANSITIONS=282} [2024-06-27 21:05:49,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 21:05:49,302 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 282 transitions, 3697 flow [2024-06-27 21:05:49,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:49,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:49,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:05:49,303 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:49,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash 737183308, now seen corresponding path program 6 times [2024-06-27 21:05:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990946292] [2024-06-27 21:05:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990946292] [2024-06-27 21:05:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990946292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906953920] [2024-06-27 21:05:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 282 transitions, 3697 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:50,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:50,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:50,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:51,367 INFO L124 PetriNetUnfolderBase]: 3204/4846 cut-off events. [2024-06-27 21:05:51,368 INFO L125 PetriNetUnfolderBase]: For 259510/259512 co-relation queries the response was YES. [2024-06-27 21:05:51,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39306 conditions, 4846 events. 3204/4846 cut-off events. For 259510/259512 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 25244 event pairs, 580 based on Foata normal form. 26/4870 useless extension candidates. Maximal degree in co-relation 39196. Up to 4167 conditions per place. [2024-06-27 21:05:51,421 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 247 selfloop transitions, 104 changer transitions 0/354 dead transitions. [2024-06-27 21:05:51,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 354 transitions, 5310 flow [2024-06-27 21:05:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 21:05:51,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-27 21:05:51,423 INFO L175 Difference]: Start difference. First operand has 225 places, 282 transitions, 3697 flow. Second operand 9 states and 175 transitions. [2024-06-27 21:05:51,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 354 transitions, 5310 flow [2024-06-27 21:05:51,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 354 transitions, 5175 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:51,839 INFO L231 Difference]: Finished difference. Result has 231 places, 305 transitions, 4307 flow [2024-06-27 21:05:51,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4307, PETRI_PLACES=231, PETRI_TRANSITIONS=305} [2024-06-27 21:05:51,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-27 21:05:51,839 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 305 transitions, 4307 flow [2024-06-27 21:05:51,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:51,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:51,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:05:51,840 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:51,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1054930242, now seen corresponding path program 3 times [2024-06-27 21:05:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261390856] [2024-06-27 21:05:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:51,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:52,502 INFO 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 21:05:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261390856] [2024-06-27 21:05:52,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261390856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:52,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090446736] [2024-06-27 21:05:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:52,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:52,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:52,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 305 transitions, 4307 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:52,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:53,609 INFO L124 PetriNetUnfolderBase]: 3320/5042 cut-off events. [2024-06-27 21:05:53,610 INFO L125 PetriNetUnfolderBase]: For 282596/282598 co-relation queries the response was YES. [2024-06-27 21:05:53,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41987 conditions, 5042 events. 3320/5042 cut-off events. For 282596/282598 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26631 event pairs, 660 based on Foata normal form. 22/5062 useless extension candidates. Maximal degree in co-relation 41873. Up to 4312 conditions per place. [2024-06-27 21:05:53,667 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 280 selfloop transitions, 61 changer transitions 0/344 dead transitions. [2024-06-27 21:05:53,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 344 transitions, 5185 flow [2024-06-27 21:05:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:53,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:05:53,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 21:05:53,669 INFO L175 Difference]: Start difference. First operand has 231 places, 305 transitions, 4307 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:05:53,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 344 transitions, 5185 flow [2024-06-27 21:05:54,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 344 transitions, 4972 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:54,203 INFO L231 Difference]: Finished difference. Result has 237 places, 307 transitions, 4284 flow [2024-06-27 21:05:54,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4284, PETRI_PLACES=237, PETRI_TRANSITIONS=307} [2024-06-27 21:05:54,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-27 21:05:54,204 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 307 transitions, 4284 flow [2024-06-27 21:05:54,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:54,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:54,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:54,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:05:54,204 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:54,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 737391070, now seen corresponding path program 4 times [2024-06-27 21:05:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:54,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728112384] [2024-06-27 21:05:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:54,819 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 21:05:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728112384] [2024-06-27 21:05:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728112384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:54,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:54,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350229896] [2024-06-27 21:05:54,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:54,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:54,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:54,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:54,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 307 transitions, 4284 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:54,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:54,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:54,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:55,898 INFO L124 PetriNetUnfolderBase]: 3395/5167 cut-off events. [2024-06-27 21:05:55,898 INFO L125 PetriNetUnfolderBase]: For 288361/288363 co-relation queries the response was YES. [2024-06-27 21:05:55,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42428 conditions, 5167 events. 3395/5167 cut-off events. For 288361/288363 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 27625 event pairs, 676 based on Foata normal form. 22/5187 useless extension candidates. Maximal degree in co-relation 42312. Up to 4659 conditions per place. [2024-06-27 21:05:55,965 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 283 selfloop transitions, 59 changer transitions 0/345 dead transitions. [2024-06-27 21:05:55,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 345 transitions, 5150 flow [2024-06-27 21:05:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:05:55,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:05:55,966 INFO L175 Difference]: Start difference. First operand has 237 places, 307 transitions, 4284 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:05:55,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 345 transitions, 5150 flow [2024-06-27 21:05:56,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 345 transitions, 5020 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:56,605 INFO L231 Difference]: Finished difference. Result has 239 places, 308 transitions, 4318 flow [2024-06-27 21:05:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4318, PETRI_PLACES=239, PETRI_TRANSITIONS=308} [2024-06-27 21:05:56,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-27 21:05:56,606 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 308 transitions, 4318 flow [2024-06-27 21:05:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:56,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:56,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:05:56,606 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:56,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash 871741828, now seen corresponding path program 5 times [2024-06-27 21:05:56,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:56,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198153269] [2024-06-27 21:05:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:57,133 INFO 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 21:05:57,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198153269] [2024-06-27 21:05:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198153269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:57,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796223511] [2024-06-27 21:05:57,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:57,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:57,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:57,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:57,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 308 transitions, 4318 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:57,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:57,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:57,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:58,297 INFO L124 PetriNetUnfolderBase]: 3514/5368 cut-off events. [2024-06-27 21:05:58,297 INFO L125 PetriNetUnfolderBase]: For 311235/311237 co-relation queries the response was YES. [2024-06-27 21:05:58,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44270 conditions, 5368 events. 3514/5368 cut-off events. For 311235/311237 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 29012 event pairs, 699 based on Foata normal form. 18/5384 useless extension candidates. Maximal degree in co-relation 44153. Up to 4152 conditions per place. [2024-06-27 21:05:58,353 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 283 selfloop transitions, 66 changer transitions 0/352 dead transitions. [2024-06-27 21:05:58,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 352 transitions, 5454 flow [2024-06-27 21:05:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:05:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:05:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:05:58,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:05:58,355 INFO L175 Difference]: Start difference. First operand has 239 places, 308 transitions, 4318 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:05:58,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 352 transitions, 5454 flow [2024-06-27 21:05:59,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 352 transitions, 5320 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:05:59,008 INFO L231 Difference]: Finished difference. Result has 241 places, 310 transitions, 4396 flow [2024-06-27 21:05:59,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4396, PETRI_PLACES=241, PETRI_TRANSITIONS=310} [2024-06-27 21:05:59,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-27 21:05:59,008 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 310 transitions, 4396 flow [2024-06-27 21:05:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:05:59,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:59,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:59,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:05:59,009 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:59,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -857873536, now seen corresponding path program 7 times [2024-06-27 21:05:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868783533] [2024-06-27 21:05:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868783533] [2024-06-27 21:05:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868783533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:59,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:05:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709430920] [2024-06-27 21:05:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:05:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:05:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:05:59,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:59,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 310 transitions, 4396 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:59,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:59,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:59,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:00,913 INFO L124 PetriNetUnfolderBase]: 3531/5399 cut-off events. [2024-06-27 21:06:00,913 INFO L125 PetriNetUnfolderBase]: For 308730/308754 co-relation queries the response was YES. [2024-06-27 21:06:00,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44708 conditions, 5399 events. 3531/5399 cut-off events. For 308730/308754 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29332 event pairs, 738 based on Foata normal form. 12/5397 useless extension candidates. Maximal degree in co-relation 44590. Up to 4986 conditions per place. [2024-06-27 21:06:00,970 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 66 changer transitions 0/343 dead transitions. [2024-06-27 21:06:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 343 transitions, 5244 flow [2024-06-27 21:06:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:06:00,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 21:06:00,972 INFO L175 Difference]: Start difference. First operand has 241 places, 310 transitions, 4396 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:06:00,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 343 transitions, 5244 flow [2024-06-27 21:06:01,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 343 transitions, 5145 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:01,566 INFO L231 Difference]: Finished difference. Result has 245 places, 312 transitions, 4506 flow [2024-06-27 21:06:01,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4506, PETRI_PLACES=245, PETRI_TRANSITIONS=312} [2024-06-27 21:06:01,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-27 21:06:01,567 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 312 transitions, 4506 flow [2024-06-27 21:06:01,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:01,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:01,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:01,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:06:01,567 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:01,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash -858021406, now seen corresponding path program 8 times [2024-06-27 21:06:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:01,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892121308] [2024-06-27 21:06:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:02,398 INFO 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 21:06:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892121308] [2024-06-27 21:06:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892121308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:02,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43031980] [2024-06-27 21:06:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:02,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:02,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:02,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 312 transitions, 4506 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:02,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:02,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:02,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:03,668 INFO L124 PetriNetUnfolderBase]: 3548/5426 cut-off events. [2024-06-27 21:06:03,668 INFO L125 PetriNetUnfolderBase]: For 319756/319780 co-relation queries the response was YES. [2024-06-27 21:06:03,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45345 conditions, 5426 events. 3548/5426 cut-off events. For 319756/319780 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 29548 event pairs, 736 based on Foata normal form. 12/5424 useless extension candidates. Maximal degree in co-relation 45225. Up to 4943 conditions per place. [2024-06-27 21:06:03,733 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 277 selfloop transitions, 70 changer transitions 0/350 dead transitions. [2024-06-27 21:06:03,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 350 transitions, 5652 flow [2024-06-27 21:06:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:06:03,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:06:03,735 INFO L175 Difference]: Start difference. First operand has 245 places, 312 transitions, 4506 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:06:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 350 transitions, 5652 flow [2024-06-27 21:06:04,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 350 transitions, 5452 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:04,438 INFO L231 Difference]: Finished difference. Result has 248 places, 317 transitions, 4622 flow [2024-06-27 21:06:04,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4622, PETRI_PLACES=248, PETRI_TRANSITIONS=317} [2024-06-27 21:06:04,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-27 21:06:04,439 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 317 transitions, 4622 flow [2024-06-27 21:06:04,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:04,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:04,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:06:04,440 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:04,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1114216410, now seen corresponding path program 6 times [2024-06-27 21:06:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755142608] [2024-06-27 21:06:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:05,057 INFO 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 21:06:05,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:05,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755142608] [2024-06-27 21:06:05,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755142608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:05,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:05,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892693698] [2024-06-27 21:06:05,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:05,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 317 transitions, 4622 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:05,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:05,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:05,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:06,190 INFO L124 PetriNetUnfolderBase]: 3742/5744 cut-off events. [2024-06-27 21:06:06,190 INFO L125 PetriNetUnfolderBase]: For 385947/385971 co-relation queries the response was YES. [2024-06-27 21:06:06,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49118 conditions, 5744 events. 3742/5744 cut-off events. For 385947/385971 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31800 event pairs, 754 based on Foata normal form. 24/5754 useless extension candidates. Maximal degree in co-relation 48996. Up to 4781 conditions per place. [2024-06-27 21:06:06,259 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 264 selfloop transitions, 95 changer transitions 0/362 dead transitions. [2024-06-27 21:06:06,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 362 transitions, 5878 flow [2024-06-27 21:06:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:06:06,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 21:06:06,261 INFO L175 Difference]: Start difference. First operand has 248 places, 317 transitions, 4622 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:06:06,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 362 transitions, 5878 flow [2024-06-27 21:06:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 362 transitions, 5664 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:07,080 INFO L231 Difference]: Finished difference. Result has 253 places, 320 transitions, 4760 flow [2024-06-27 21:06:07,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4760, PETRI_PLACES=253, PETRI_TRANSITIONS=320} [2024-06-27 21:06:07,080 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-27 21:06:07,080 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 320 transitions, 4760 flow [2024-06-27 21:06:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:07,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:07,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:07,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:06:07,081 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:07,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash 857708460, now seen corresponding path program 7 times [2024-06-27 21:06:07,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:07,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679273490] [2024-06-27 21:06:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:07,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:07,664 INFO 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 21:06:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679273490] [2024-06-27 21:06:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679273490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:07,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:07,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715453543] [2024-06-27 21:06:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:07,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:07,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:07,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:07,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 320 transitions, 4760 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:07,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:07,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:07,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:08,855 INFO L124 PetriNetUnfolderBase]: 3809/5857 cut-off events. [2024-06-27 21:06:08,856 INFO L125 PetriNetUnfolderBase]: For 404659/404683 co-relation queries the response was YES. [2024-06-27 21:06:08,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49901 conditions, 5857 events. 3809/5857 cut-off events. For 404659/404683 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32706 event pairs, 763 based on Foata normal form. 32/5875 useless extension candidates. Maximal degree in co-relation 49776. Up to 5090 conditions per place. [2024-06-27 21:06:08,932 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 258 selfloop transitions, 97 changer transitions 0/358 dead transitions. [2024-06-27 21:06:08,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 358 transitions, 5682 flow [2024-06-27 21:06:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:06:08,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:06:08,934 INFO L175 Difference]: Start difference. First operand has 253 places, 320 transitions, 4760 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:06:08,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 358 transitions, 5682 flow [2024-06-27 21:06:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 358 transitions, 5519 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:09,691 INFO L231 Difference]: Finished difference. Result has 257 places, 322 transitions, 4869 flow [2024-06-27 21:06:09,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4869, PETRI_PLACES=257, PETRI_TRANSITIONS=322} [2024-06-27 21:06:09,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-27 21:06:09,693 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 322 transitions, 4869 flow [2024-06-27 21:06:09,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:09,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:09,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:06:09,693 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:09,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1912467656, now seen corresponding path program 9 times [2024-06-27 21:06:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:09,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353536550] [2024-06-27 21:06:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:09,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:10,503 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 21:06:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353536550] [2024-06-27 21:06:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353536550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:10,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502250220] [2024-06-27 21:06:10,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:10,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:10,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 322 transitions, 4869 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:10,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:10,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:11,752 INFO L124 PetriNetUnfolderBase]: 3801/5845 cut-off events. [2024-06-27 21:06:11,752 INFO L125 PetriNetUnfolderBase]: For 379543/379567 co-relation queries the response was YES. [2024-06-27 21:06:11,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49787 conditions, 5845 events. 3801/5845 cut-off events. For 379543/379567 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32652 event pairs, 804 based on Foata normal form. 12/5843 useless extension candidates. Maximal degree in co-relation 49660. Up to 5432 conditions per place. [2024-06-27 21:06:11,830 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 65 changer transitions 0/355 dead transitions. [2024-06-27 21:06:11,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 355 transitions, 5708 flow [2024-06-27 21:06:11,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:06:11,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:06:11,851 INFO L175 Difference]: Start difference. First operand has 257 places, 322 transitions, 4869 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:06:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 355 transitions, 5708 flow [2024-06-27 21:06:12,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 355 transitions, 5414 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:12,734 INFO L231 Difference]: Finished difference. Result has 259 places, 323 transitions, 4741 flow [2024-06-27 21:06:12,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4741, PETRI_PLACES=259, PETRI_TRANSITIONS=323} [2024-06-27 21:06:12,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-27 21:06:12,735 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 323 transitions, 4741 flow [2024-06-27 21:06:12,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:12,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:12,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:06:12,735 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:12,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1912252454, now seen corresponding path program 8 times [2024-06-27 21:06:12,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:12,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915012888] [2024-06-27 21:06:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:12,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:13,472 INFO 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 21:06:13,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:13,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915012888] [2024-06-27 21:06:13,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915012888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:13,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:13,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571310052] [2024-06-27 21:06:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:13,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:13,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:13,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 323 transitions, 4741 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:13,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:13,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:13,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:14,820 INFO L124 PetriNetUnfolderBase]: 3970/6124 cut-off events. [2024-06-27 21:06:14,821 INFO L125 PetriNetUnfolderBase]: For 441345/441369 co-relation queries the response was YES. [2024-06-27 21:06:14,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52398 conditions, 6124 events. 3970/6124 cut-off events. For 441345/441369 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34760 event pairs, 837 based on Foata normal form. 24/6134 useless extension candidates. Maximal degree in co-relation 52270. Up to 5217 conditions per place. [2024-06-27 21:06:14,901 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 291 selfloop transitions, 77 changer transitions 0/371 dead transitions. [2024-06-27 21:06:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 371 transitions, 5973 flow [2024-06-27 21:06:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:06:14,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-27 21:06:14,903 INFO L175 Difference]: Start difference. First operand has 259 places, 323 transitions, 4741 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:06:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 371 transitions, 5973 flow [2024-06-27 21:06:15,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 371 transitions, 5832 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:15,736 INFO L231 Difference]: Finished difference. Result has 262 places, 325 transitions, 4850 flow [2024-06-27 21:06:15,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4850, PETRI_PLACES=262, PETRI_TRANSITIONS=325} [2024-06-27 21:06:15,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-27 21:06:15,737 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 325 transitions, 4850 flow [2024-06-27 21:06:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:15,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:06:15,738 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:15,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2033859420, now seen corresponding path program 9 times [2024-06-27 21:06:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414810942] [2024-06-27 21:06:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:16,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414810942] [2024-06-27 21:06:16,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414810942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:16,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:16,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:06:16,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314816343] [2024-06-27 21:06:16,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:16,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:06:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:06:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:06:16,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:16,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 325 transitions, 4850 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:16,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:16,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:16,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:17,781 INFO L124 PetriNetUnfolderBase]: 3934/6068 cut-off events. [2024-06-27 21:06:17,781 INFO L125 PetriNetUnfolderBase]: For 432787/432811 co-relation queries the response was YES. [2024-06-27 21:06:17,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51339 conditions, 6068 events. 3934/6068 cut-off events. For 432787/432811 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34378 event pairs, 810 based on Foata normal form. 28/6082 useless extension candidates. Maximal degree in co-relation 51210. Up to 5171 conditions per place. [2024-06-27 21:06:17,854 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 265 selfloop transitions, 97 changer transitions 0/365 dead transitions. [2024-06-27 21:06:17,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 365 transitions, 5734 flow [2024-06-27 21:06:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:06:17,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2024-06-27 21:06:17,856 INFO L175 Difference]: Start difference. First operand has 262 places, 325 transitions, 4850 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:06:17,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 365 transitions, 5734 flow [2024-06-27 21:06:18,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 365 transitions, 5592 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:18,678 INFO L231 Difference]: Finished difference. Result has 267 places, 325 transitions, 4914 flow [2024-06-27 21:06:18,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4914, PETRI_PLACES=267, PETRI_TRANSITIONS=325} [2024-06-27 21:06:18,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-27 21:06:18,679 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 325 transitions, 4914 flow [2024-06-27 21:06:18,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:18,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:18,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:18,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:06:18,679 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:18,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1912259894, now seen corresponding path program 10 times [2024-06-27 21:06:18,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143952508] [2024-06-27 21:06:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:19,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:19,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143952508] [2024-06-27 21:06:19,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143952508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:19,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:19,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565424602] [2024-06-27 21:06:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:19,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:19,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:19,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 325 transitions, 4914 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:19,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:19,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:19,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:20,593 INFO L124 PetriNetUnfolderBase]: 3959/6115 cut-off events. [2024-06-27 21:06:20,594 INFO L125 PetriNetUnfolderBase]: For 427871/427895 co-relation queries the response was YES. [2024-06-27 21:06:20,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51196 conditions, 6115 events. 3959/6115 cut-off events. For 427871/427895 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34826 event pairs, 831 based on Foata normal form. 28/6129 useless extension candidates. Maximal degree in co-relation 51065. Up to 5348 conditions per place. [2024-06-27 21:06:20,664 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 267 selfloop transitions, 92 changer transitions 0/362 dead transitions. [2024-06-27 21:06:20,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 362 transitions, 5814 flow [2024-06-27 21:06:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:06:20,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-27 21:06:20,665 INFO L175 Difference]: Start difference. First operand has 267 places, 325 transitions, 4914 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:06:20,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 362 transitions, 5814 flow [2024-06-27 21:06:21,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 362 transitions, 5610 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 21:06:21,506 INFO L231 Difference]: Finished difference. Result has 268 places, 326 transitions, 4940 flow [2024-06-27 21:06:21,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4710, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4940, PETRI_PLACES=268, PETRI_TRANSITIONS=326} [2024-06-27 21:06:21,506 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-27 21:06:21,507 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 326 transitions, 4940 flow [2024-06-27 21:06:21,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:21,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:21,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:21,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:06:21,507 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:21,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1123413180, now seen corresponding path program 11 times [2024-06-27 21:06:21,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:21,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112601474] [2024-06-27 21:06:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:21,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112601474] [2024-06-27 21:06:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112601474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:22,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:22,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289659560] [2024-06-27 21:06:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:22,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:22,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:22,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 326 transitions, 4940 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:22,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:22,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:22,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:23,373 INFO L124 PetriNetUnfolderBase]: 3967/6135 cut-off events. [2024-06-27 21:06:23,373 INFO L125 PetriNetUnfolderBase]: For 411436/411460 co-relation queries the response was YES. [2024-06-27 21:06:23,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50822 conditions, 6135 events. 3967/6135 cut-off events. For 411436/411460 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34752 event pairs, 733 based on Foata normal form. 24/6145 useless extension candidates. Maximal degree in co-relation 50690. Up to 3653 conditions per place. [2024-06-27 21:06:23,457 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 117 changer transitions 0/368 dead transitions. [2024-06-27 21:06:23,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 368 transitions, 6110 flow [2024-06-27 21:06:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:06:23,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 21:06:23,461 INFO L175 Difference]: Start difference. First operand has 268 places, 326 transitions, 4940 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:06:23,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 368 transitions, 6110 flow [2024-06-27 21:06:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 368 transitions, 5912 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:24,514 INFO L231 Difference]: Finished difference. Result has 270 places, 327 transitions, 5030 flow [2024-06-27 21:06:24,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5030, PETRI_PLACES=270, PETRI_TRANSITIONS=327} [2024-06-27 21:06:24,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-27 21:06:24,514 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 327 transitions, 5030 flow [2024-06-27 21:06:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 21:06:24,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:24,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:24,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:06:24,515 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 21:06:24,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1962599474, now seen corresponding path program 1 times [2024-06-27 21:06:24,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:24,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023418581] [2024-06-27 21:06:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:24,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:24,959 INFO 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 21:06:24,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:24,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023418581] [2024-06-27 21:06:24,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023418581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:24,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:24,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:24,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437718424] [2024-06-27 21:06:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:24,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:24,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:24,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 327 transitions, 5030 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:24,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:24,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:24,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:26,107 INFO L124 PetriNetUnfolderBase]: 3972/6140 cut-off events. [2024-06-27 21:06:26,108 INFO L125 PetriNetUnfolderBase]: For 399647/399647 co-relation queries the response was YES. [2024-06-27 21:06:26,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51282 conditions, 6140 events. 3972/6140 cut-off events. For 399647/399647 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35110 event pairs, 936 based on Foata normal form. 1/6139 useless extension candidates. Maximal degree in co-relation 51149. Up to 6085 conditions per place. [2024-06-27 21:06:26,189 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 326 selfloop transitions, 21 changer transitions 0/350 dead transitions. [2024-06-27 21:06:26,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 350 transitions, 6048 flow [2024-06-27 21:06:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:26,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:06:26,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 21:06:26,190 INFO L175 Difference]: Start difference. First operand has 270 places, 327 transitions, 5030 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:06:26,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 350 transitions, 6048 flow [2024-06-27 21:06:27,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 350 transitions, 5778 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:27,166 INFO L231 Difference]: Finished difference. Result has 270 places, 333 transitions, 4974 flow [2024-06-27 21:06:27,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4974, PETRI_PLACES=270, PETRI_TRANSITIONS=333} [2024-06-27 21:06:27,167 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-27 21:06:27,167 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 333 transitions, 4974 flow [2024-06-27 21:06:27,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:27,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:27,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:27,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:06:27,168 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 21:06:27,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1962719444, now seen corresponding path program 2 times [2024-06-27 21:06:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:27,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259056856] [2024-06-27 21:06:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:27,712 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 21:06:27,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259056856] [2024-06-27 21:06:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259056856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:27,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:27,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827697345] [2024-06-27 21:06:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:27,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:27,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 333 transitions, 4974 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:27,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:27,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:27,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:28,971 INFO L124 PetriNetUnfolderBase]: 3982/6154 cut-off events. [2024-06-27 21:06:28,972 INFO L125 PetriNetUnfolderBase]: For 406141/406141 co-relation queries the response was YES. [2024-06-27 21:06:29,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50848 conditions, 6154 events. 3982/6154 cut-off events. For 406141/406141 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35142 event pairs, 936 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 50714. Up to 6111 conditions per place. [2024-06-27 21:06:29,049 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 330 selfloop transitions, 19 changer transitions 0/352 dead transitions. [2024-06-27 21:06:29,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 352 transitions, 5832 flow [2024-06-27 21:06:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-27 21:06:29,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-27 21:06:29,050 INFO L175 Difference]: Start difference. First operand has 270 places, 333 transitions, 4974 flow. Second operand 7 states and 104 transitions. [2024-06-27 21:06:29,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 352 transitions, 5832 flow [2024-06-27 21:06:30,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 352 transitions, 5704 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:30,066 INFO L231 Difference]: Finished difference. Result has 274 places, 339 transitions, 5018 flow [2024-06-27 21:06:30,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5018, PETRI_PLACES=274, PETRI_TRANSITIONS=339} [2024-06-27 21:06:30,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 21:06:30,067 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 339 transitions, 5018 flow [2024-06-27 21:06:30,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:30,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:30,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:30,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:06:30,068 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 21:06:30,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1053895322, now seen corresponding path program 1 times [2024-06-27 21:06:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707053572] [2024-06-27 21:06:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:30,556 INFO 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 21:06:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707053572] [2024-06-27 21:06:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707053572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:30,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727485426] [2024-06-27 21:06:30,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:30,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:30,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:30,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 339 transitions, 5018 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:30,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:30,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:30,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:31,812 INFO L124 PetriNetUnfolderBase]: 4017/6201 cut-off events. [2024-06-27 21:06:31,812 INFO L125 PetriNetUnfolderBase]: For 422605/422635 co-relation queries the response was YES. [2024-06-27 21:06:31,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51287 conditions, 6201 events. 4017/6201 cut-off events. For 422605/422635 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35463 event pairs, 874 based on Foata normal form. 24/6219 useless extension candidates. Maximal degree in co-relation 51151. Up to 6022 conditions per place. [2024-06-27 21:06:31,882 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 317 selfloop transitions, 47 changer transitions 0/367 dead transitions. [2024-06-27 21:06:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 367 transitions, 6043 flow [2024-06-27 21:06:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:06:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:06:31,884 INFO L175 Difference]: Start difference. First operand has 274 places, 339 transitions, 5018 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:06:31,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 367 transitions, 6043 flow [2024-06-27 21:06:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 367 transitions, 5951 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:32,892 INFO L231 Difference]: Finished difference. Result has 278 places, 348 transitions, 5143 flow [2024-06-27 21:06:32,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5143, PETRI_PLACES=278, PETRI_TRANSITIONS=348} [2024-06-27 21:06:32,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-27 21:06:32,893 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 348 transitions, 5143 flow [2024-06-27 21:06:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:32,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:32,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:32,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:06:32,894 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 21:06:32,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:32,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1380579806, now seen corresponding path program 2 times [2024-06-27 21:06:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:32,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930383432] [2024-06-27 21:06:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:32,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:33,332 INFO 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 21:06:33,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:33,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930383432] [2024-06-27 21:06:33,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930383432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:33,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626051344] [2024-06-27 21:06:33,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:33,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:33,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:33,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:33,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 348 transitions, 5143 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:33,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:33,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:33,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:34,571 INFO L124 PetriNetUnfolderBase]: 4037/6229 cut-off events. [2024-06-27 21:06:34,572 INFO L125 PetriNetUnfolderBase]: For 434146/434176 co-relation queries the response was YES. [2024-06-27 21:06:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51824 conditions, 6229 events. 4037/6229 cut-off events. For 434146/434176 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35659 event pairs, 865 based on Foata normal form. 24/6247 useless extension candidates. Maximal degree in co-relation 51686. Up to 6155 conditions per place. [2024-06-27 21:06:34,659 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 24 changer transitions 0/364 dead transitions. [2024-06-27 21:06:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 364 transitions, 5966 flow [2024-06-27 21:06:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-27 21:06:34,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-27 21:06:34,660 INFO L175 Difference]: Start difference. First operand has 278 places, 348 transitions, 5143 flow. Second operand 6 states and 94 transitions. [2024-06-27 21:06:34,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 364 transitions, 5966 flow [2024-06-27 21:06:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 364 transitions, 5888 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:06:35,652 INFO L231 Difference]: Finished difference. Result has 281 places, 352 transitions, 5181 flow [2024-06-27 21:06:35,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5181, PETRI_PLACES=281, PETRI_TRANSITIONS=352} [2024-06-27 21:06:35,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-27 21:06:35,653 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 352 transitions, 5181 flow [2024-06-27 21:06:35,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:35,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:35,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:35,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:06:35,653 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 21:06:35,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1380817142, now seen corresponding path program 3 times [2024-06-27 21:06:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104841696] [2024-06-27 21:06:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:36,148 INFO 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 21:06:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:36,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104841696] [2024-06-27 21:06:36,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104841696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:36,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:36,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603128845] [2024-06-27 21:06:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:36,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:36,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 352 transitions, 5181 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:36,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:36,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:36,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:37,392 INFO L124 PetriNetUnfolderBase]: 4034/6227 cut-off events. [2024-06-27 21:06:37,392 INFO L125 PetriNetUnfolderBase]: For 438558/438558 co-relation queries the response was YES. [2024-06-27 21:06:37,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51832 conditions, 6227 events. 4034/6227 cut-off events. For 438558/438558 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35612 event pairs, 936 based on Foata normal form. 1/6226 useless extension candidates. Maximal degree in co-relation 51693. Up to 6178 conditions per place. [2024-06-27 21:06:37,479 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 345 selfloop transitions, 19 changer transitions 0/367 dead transitions. [2024-06-27 21:06:37,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 367 transitions, 5955 flow [2024-06-27 21:06:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 21:06:37,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 21:06:37,481 INFO L175 Difference]: Start difference. First operand has 281 places, 352 transitions, 5181 flow. Second operand 6 states and 97 transitions. [2024-06-27 21:06:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 367 transitions, 5955 flow [2024-06-27 21:06:38,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 367 transitions, 5846 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:38,628 INFO L231 Difference]: Finished difference. Result has 283 places, 352 transitions, 5120 flow [2024-06-27 21:06:38,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5120, PETRI_PLACES=283, PETRI_TRANSITIONS=352} [2024-06-27 21:06:38,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 21:06:38,629 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 352 transitions, 5120 flow [2024-06-27 21:06:38,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:38,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:38,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:38,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:06:38,629 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 21:06:38,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1096939826, now seen corresponding path program 3 times [2024-06-27 21:06:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:38,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864176672] [2024-06-27 21:06:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:39,099 INFO 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 21:06:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:39,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864176672] [2024-06-27 21:06:39,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864176672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:39,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:39,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210351344] [2024-06-27 21:06:39,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:39,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:39,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:39,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 352 transitions, 5120 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:39,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:39,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:39,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:40,332 INFO L124 PetriNetUnfolderBase]: 4011/6192 cut-off events. [2024-06-27 21:06:40,332 INFO L125 PetriNetUnfolderBase]: For 446974/447004 co-relation queries the response was YES. [2024-06-27 21:06:40,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51476 conditions, 6192 events. 4011/6192 cut-off events. For 446974/447004 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35385 event pairs, 854 based on Foata normal form. 24/6210 useless extension candidates. Maximal degree in co-relation 51337. Up to 6010 conditions per place. [2024-06-27 21:06:40,404 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 314 selfloop transitions, 51 changer transitions 0/368 dead transitions. [2024-06-27 21:06:40,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 368 transitions, 5918 flow [2024-06-27 21:06:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:06:40,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:06:40,406 INFO L175 Difference]: Start difference. First operand has 283 places, 352 transitions, 5120 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:06:40,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 368 transitions, 5918 flow [2024-06-27 21:06:41,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 368 transitions, 5866 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:41,659 INFO L231 Difference]: Finished difference. Result has 284 places, 352 transitions, 5186 flow [2024-06-27 21:06:41,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5186, PETRI_PLACES=284, PETRI_TRANSITIONS=352} [2024-06-27 21:06:41,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 21:06:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 352 transitions, 5186 flow [2024-06-27 21:06:41,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:41,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:41,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:06:41,662 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 21:06:41,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1380570878, now seen corresponding path program 1 times [2024-06-27 21:06:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817990052] [2024-06-27 21:06:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:42,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:42,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817990052] [2024-06-27 21:06:42,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817990052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:42,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:42,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354703206] [2024-06-27 21:06:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:42,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:42,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 352 transitions, 5186 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:06:42,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:42,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:42,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:43,739 INFO L124 PetriNetUnfolderBase]: 4014/6197 cut-off events. [2024-06-27 21:06:43,739 INFO L125 PetriNetUnfolderBase]: For 455899/455929 co-relation queries the response was YES. [2024-06-27 21:06:43,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51762 conditions, 6197 events. 4014/6197 cut-off events. For 455899/455929 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35316 event pairs, 908 based on Foata normal form. 24/6215 useless extension candidates. Maximal degree in co-relation 51622. Up to 6112 conditions per place. [2024-06-27 21:06:43,828 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 336 selfloop transitions, 28 changer transitions 0/367 dead transitions. [2024-06-27 21:06:43,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 367 transitions, 6010 flow [2024-06-27 21:06:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:06:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:06:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 21:06:43,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:06:43,830 INFO L175 Difference]: Start difference. First operand has 284 places, 352 transitions, 5186 flow. Second operand 6 states and 95 transitions. [2024-06-27 21:06:43,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 367 transitions, 6010 flow [2024-06-27 21:06:45,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 367 transitions, 5868 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:06:45,046 INFO L231 Difference]: Finished difference. Result has 285 places, 355 transitions, 5168 flow [2024-06-27 21:06:45,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5168, PETRI_PLACES=285, PETRI_TRANSITIONS=355} [2024-06-27 21:06:45,047 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 21:06:45,047 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 355 transitions, 5168 flow [2024-06-27 21:06:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:06:45,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:45,047 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 21:06:45,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:06:45,047 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:45,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:45,048 INFO L85 PathProgramCache]: Analyzing trace with hash 804108675, now seen corresponding path program 1 times [2024-06-27 21:06:45,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:45,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256840037] [2024-06-27 21:06:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256840037] [2024-06-27 21:06:45,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256840037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:45,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105920032] [2024-06-27 21:06:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 355 transitions, 5168 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:47,087 INFO L124 PetriNetUnfolderBase]: 4055/6268 cut-off events. [2024-06-27 21:06:47,087 INFO L125 PetriNetUnfolderBase]: For 472213/472215 co-relation queries the response was YES. [2024-06-27 21:06:47,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52261 conditions, 6268 events. 4055/6268 cut-off events. For 472213/472215 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35734 event pairs, 711 based on Foata normal form. 14/6280 useless extension candidates. Maximal degree in co-relation 52120. Up to 5954 conditions per place. [2024-06-27 21:06:47,174 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 360 selfloop transitions, 28 changer transitions 0/391 dead transitions. [2024-06-27 21:06:47,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 391 transitions, 6100 flow [2024-06-27 21:06:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:06:47,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 21:06:47,177 INFO L175 Difference]: Start difference. First operand has 285 places, 355 transitions, 5168 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:06:47,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 391 transitions, 6100 flow [2024-06-27 21:06:48,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 391 transitions, 5998 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:48,445 INFO L231 Difference]: Finished difference. Result has 290 places, 356 transitions, 5178 flow [2024-06-27 21:06:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5178, PETRI_PLACES=290, PETRI_TRANSITIONS=356} [2024-06-27 21:06:48,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 21:06:48,445 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 356 transitions, 5178 flow [2024-06-27 21:06:48,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:48,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,446 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 21:06:48,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:06:48,446 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:48,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -606080777, now seen corresponding path program 2 times [2024-06-27 21:06:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141089315] [2024-06-27 21:06:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:49,275 INFO 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 21:06:49,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:49,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141089315] [2024-06-27 21:06:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141089315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838121147] [2024-06-27 21:06:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:49,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:49,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:49,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 356 transitions, 5178 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:49,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:49,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:49,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:50,659 INFO L124 PetriNetUnfolderBase]: 4096/6339 cut-off events. [2024-06-27 21:06:50,659 INFO L125 PetriNetUnfolderBase]: For 487793/487795 co-relation queries the response was YES. [2024-06-27 21:06:50,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52956 conditions, 6339 events. 4096/6339 cut-off events. For 487793/487795 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36592 event pairs, 811 based on Foata normal form. 14/6351 useless extension candidates. Maximal degree in co-relation 52814. Up to 5832 conditions per place. [2024-06-27 21:06:50,749 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 332 selfloop transitions, 57 changer transitions 0/392 dead transitions. [2024-06-27 21:06:50,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 392 transitions, 6118 flow [2024-06-27 21:06:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:06:50,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:06:50,751 INFO L175 Difference]: Start difference. First operand has 290 places, 356 transitions, 5178 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:06:50,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 392 transitions, 6118 flow [2024-06-27 21:06:51,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 392 transitions, 6026 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:51,905 INFO L231 Difference]: Finished difference. Result has 292 places, 357 transitions, 5259 flow [2024-06-27 21:06:51,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5259, PETRI_PLACES=292, PETRI_TRANSITIONS=357} [2024-06-27 21:06:51,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-27 21:06:51,906 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 357 transitions, 5259 flow [2024-06-27 21:06:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:51,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:51,906 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 21:06:51,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:06:51,906 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:51,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -327095171, now seen corresponding path program 3 times [2024-06-27 21:06:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005528121] [2024-06-27 21:06:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:52,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005528121] [2024-06-27 21:06:52,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005528121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:52,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:52,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:52,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380729517] [2024-06-27 21:06:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:52,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:52,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:52,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:52,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:52,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:52,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 357 transitions, 5259 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:52,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:52,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:52,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:54,158 INFO L124 PetriNetUnfolderBase]: 4076/6307 cut-off events. [2024-06-27 21:06:54,158 INFO L125 PetriNetUnfolderBase]: For 479573/479575 co-relation queries the response was YES. [2024-06-27 21:06:54,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52212 conditions, 6307 events. 4076/6307 cut-off events. For 479573/479575 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36270 event pairs, 796 based on Foata normal form. 14/6319 useless extension candidates. Maximal degree in co-relation 52069. Up to 5808 conditions per place. [2024-06-27 21:06:54,244 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 335 selfloop transitions, 54 changer transitions 0/392 dead transitions. [2024-06-27 21:06:54,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 392 transitions, 6153 flow [2024-06-27 21:06:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:06:54,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:06:54,245 INFO L175 Difference]: Start difference. First operand has 292 places, 357 transitions, 5259 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:06:54,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 392 transitions, 6153 flow [2024-06-27 21:06:55,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 392 transitions, 5998 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:55,552 INFO L231 Difference]: Finished difference. Result has 294 places, 357 transitions, 5222 flow [2024-06-27 21:06:55,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5104, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5222, PETRI_PLACES=294, PETRI_TRANSITIONS=357} [2024-06-27 21:06:55,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-27 21:06:55,553 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 357 transitions, 5222 flow [2024-06-27 21:06:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:55,554 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 21:06:55,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:06:55,554 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 21:06:55,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash 477888582, now seen corresponding path program 1 times [2024-06-27 21:06:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:55,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525938107] [2024-06-27 21:06:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:55,987 INFO 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 21:06:55,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:55,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525938107] [2024-06-27 21:06:55,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525938107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:55,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:55,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:55,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229934837] [2024-06-27 21:06:55,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:55,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:55,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:55,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:56,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 357 transitions, 5222 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:57,542 INFO L124 PetriNetUnfolderBase]: 4116/6363 cut-off events. [2024-06-27 21:06:57,543 INFO L125 PetriNetUnfolderBase]: For 476358/476388 co-relation queries the response was YES. [2024-06-27 21:06:57,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52533 conditions, 6363 events. 4116/6363 cut-off events. For 476358/476388 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36652 event pairs, 870 based on Foata normal form. 24/6381 useless extension candidates. Maximal degree in co-relation 52389. Up to 6111 conditions per place. [2024-06-27 21:06:57,613 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 330 selfloop transitions, 60 changer transitions 0/393 dead transitions. [2024-06-27 21:06:57,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 393 transitions, 6402 flow [2024-06-27 21:06:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:06:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:06:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 21:06:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 21:06:57,614 INFO L175 Difference]: Start difference. First operand has 294 places, 357 transitions, 5222 flow. Second operand 7 states and 117 transitions. [2024-06-27 21:06:57,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 393 transitions, 6402 flow [2024-06-27 21:06:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 393 transitions, 6265 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:06:58,646 INFO L231 Difference]: Finished difference. Result has 295 places, 370 transitions, 5412 flow [2024-06-27 21:06:58,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5412, PETRI_PLACES=295, PETRI_TRANSITIONS=370} [2024-06-27 21:06:58,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-27 21:06:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 370 transitions, 5412 flow [2024-06-27 21:06:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:58,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:58,647 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 21:06:58,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:06:58,647 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 21:06:58,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:58,647 INFO L85 PathProgramCache]: Analyzing trace with hash 603177418, now seen corresponding path program 2 times [2024-06-27 21:06:58,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:58,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336603229] [2024-06-27 21:06:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:58,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:59,067 INFO 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 21:06:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:59,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336603229] [2024-06-27 21:06:59,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336603229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:59,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:59,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:06:59,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536293674] [2024-06-27 21:06:59,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:06:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:06:59,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:06:59,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:59,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 370 transitions, 5412 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:59,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:59,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:59,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:00,431 INFO L124 PetriNetUnfolderBase]: 4136/6395 cut-off events. [2024-06-27 21:07:00,432 INFO L125 PetriNetUnfolderBase]: For 487252/487270 co-relation queries the response was YES. [2024-06-27 21:07:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52723 conditions, 6395 events. 4136/6395 cut-off events. For 487252/487270 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36873 event pairs, 901 based on Foata normal form. 10/6391 useless extension candidates. Maximal degree in co-relation 52577. Up to 6127 conditions per place. [2024-06-27 21:07:00,518 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 321 selfloop transitions, 65 changer transitions 0/389 dead transitions. [2024-06-27 21:07:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 389 transitions, 6428 flow [2024-06-27 21:07:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:07:00,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 21:07:00,520 INFO L175 Difference]: Start difference. First operand has 295 places, 370 transitions, 5412 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:07:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 389 transitions, 6428 flow [2024-06-27 21:07:01,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 389 transitions, 6334 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:01,812 INFO L231 Difference]: Finished difference. Result has 298 places, 373 transitions, 5489 flow [2024-06-27 21:07:01,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5489, PETRI_PLACES=298, PETRI_TRANSITIONS=373} [2024-06-27 21:07:01,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-27 21:07:01,812 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 373 transitions, 5489 flow [2024-06-27 21:07:01,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:01,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:01,813 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 21:07:01,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:07:01,813 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 21:07:01,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash 603166258, now seen corresponding path program 3 times [2024-06-27 21:07:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784090930] [2024-06-27 21:07:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:02,252 INFO 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 21:07:02,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:02,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784090930] [2024-06-27 21:07:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784090930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:02,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:02,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:07:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809954645] [2024-06-27 21:07:02,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:07:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:07:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:07:02,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:02,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 373 transitions, 5489 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:02,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:02,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:03,607 INFO L124 PetriNetUnfolderBase]: 4124/6375 cut-off events. [2024-06-27 21:07:03,608 INFO L125 PetriNetUnfolderBase]: For 490376/490406 co-relation queries the response was YES. [2024-06-27 21:07:03,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 6375 events. 4124/6375 cut-off events. For 490376/490406 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36717 event pairs, 870 based on Foata normal form. 24/6393 useless extension candidates. Maximal degree in co-relation 52383. Up to 6119 conditions per place. [2024-06-27 21:07:03,698 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 325 selfloop transitions, 65 changer transitions 0/393 dead transitions. [2024-06-27 21:07:03,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 393 transitions, 6355 flow [2024-06-27 21:07:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 21:07:03,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 21:07:03,699 INFO L175 Difference]: Start difference. First operand has 298 places, 373 transitions, 5489 flow. Second operand 6 states and 104 transitions. [2024-06-27 21:07:03,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 393 transitions, 6355 flow [2024-06-27 21:07:05,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 393 transitions, 6221 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:07:05,033 INFO L231 Difference]: Finished difference. Result has 300 places, 373 transitions, 5503 flow [2024-06-27 21:07:05,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5503, PETRI_PLACES=300, PETRI_TRANSITIONS=373} [2024-06-27 21:07:05,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 21:07:05,035 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 373 transitions, 5503 flow [2024-06-27 21:07:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:05,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:07:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:07:05,036 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:05,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -828742801, now seen corresponding path program 4 times [2024-06-27 21:07:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279402617] [2024-06-27 21:07:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:05,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:06,274 INFO 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 21:07:06,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:06,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279402617] [2024-06-27 21:07:06,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279402617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:06,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:07:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945270547] [2024-06-27 21:07:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:07:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:06,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:07:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:07:06,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:06,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 373 transitions, 5503 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:06,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:06,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:06,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:07,991 INFO L124 PetriNetUnfolderBase]: 4104/6347 cut-off events. [2024-06-27 21:07:07,992 INFO L125 PetriNetUnfolderBase]: For 492769/492787 co-relation queries the response was YES. [2024-06-27 21:07:08,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51802 conditions, 6347 events. 4104/6347 cut-off events. For 492769/492787 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36520 event pairs, 781 based on Foata normal form. 18/6351 useless extension candidates. Maximal degree in co-relation 51655. Up to 5837 conditions per place. [2024-06-27 21:07:08,079 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 342 selfloop transitions, 70 changer transitions 0/415 dead transitions. [2024-06-27 21:07:08,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 415 transitions, 6467 flow [2024-06-27 21:07:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:07:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:07:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 21:07:08,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-27 21:07:08,081 INFO L175 Difference]: Start difference. First operand has 300 places, 373 transitions, 5503 flow. Second operand 11 states and 177 transitions. [2024-06-27 21:07:08,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 415 transitions, 6467 flow [2024-06-27 21:07:09,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 415 transitions, 6302 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:09,189 INFO L231 Difference]: Finished difference. Result has 305 places, 373 transitions, 5485 flow [2024-06-27 21:07:09,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5485, PETRI_PLACES=305, PETRI_TRANSITIONS=373} [2024-06-27 21:07:09,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 21:07:09,190 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 373 transitions, 5485 flow [2024-06-27 21:07:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:09,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:09,190 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 21:07:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:07:09,190 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:07:09,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash -828858121, now seen corresponding path program 5 times [2024-06-27 21:07:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:09,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332913465] [2024-06-27 21:07:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:10,598 INFO 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 21:07:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332913465] [2024-06-27 21:07:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332913465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:10,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 21:07:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000809183] [2024-06-27 21:07:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:07:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:07:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:07:10,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:10,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 373 transitions, 5485 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:10,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:10,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:10,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:12,095 INFO L124 PetriNetUnfolderBase]: 4084/6315 cut-off events. [2024-06-27 21:07:12,096 INFO L125 PetriNetUnfolderBase]: For 467990/468008 co-relation queries the response was YES. [2024-06-27 21:07:12,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50840 conditions, 6315 events. 4084/6315 cut-off events. For 467990/468008 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36299 event pairs, 758 based on Foata normal form. 18/6319 useless extension candidates. Maximal degree in co-relation 50693. Up to 5756 conditions per place. [2024-06-27 21:07:12,181 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 74 changer transitions 0/410 dead transitions. [2024-06-27 21:07:12,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 410 transitions, 6303 flow [2024-06-27 21:07:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:07:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-27 21:07:12,183 INFO L175 Difference]: Start difference. First operand has 305 places, 373 transitions, 5485 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:07:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 410 transitions, 6303 flow [2024-06-27 21:07:13,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 410 transitions, 6126 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 21:07:13,556 INFO L231 Difference]: Finished difference. Result has 303 places, 372 transitions, 5340 flow [2024-06-27 21:07:13,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5340, PETRI_PLACES=303, PETRI_TRANSITIONS=372} [2024-06-27 21:07:13,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 21:07:13,556 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 372 transitions, 5340 flow [2024-06-27 21:07:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:07:13,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:13,557 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 21:07:13,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:07:13,557 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 21:07:13,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1685169039, now seen corresponding path program 1 times [2024-06-27 21:07:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:13,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335775019] [2024-06-27 21:07:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:14,258 INFO 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 21:07:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335775019] [2024-06-27 21:07:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335775019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:14,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:14,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:14,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320663694] [2024-06-27 21:07:14,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:14,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:14,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:14,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:14,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 372 transitions, 5340 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:14,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:14,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:14,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:15,645 INFO L124 PetriNetUnfolderBase]: 4089/6320 cut-off events. [2024-06-27 21:07:15,645 INFO L125 PetriNetUnfolderBase]: For 455756/455756 co-relation queries the response was YES. [2024-06-27 21:07:15,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 6320 events. 4089/6320 cut-off events. For 455756/455756 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36325 event pairs, 863 based on Foata normal form. 1/6319 useless extension candidates. Maximal degree in co-relation 50868. Up to 6242 conditions per place. [2024-06-27 21:07:15,722 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 361 selfloop transitions, 36 changer transitions 0/400 dead transitions. [2024-06-27 21:07:15,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 400 transitions, 6466 flow [2024-06-27 21:07:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:07:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:07:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 21:07:15,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-27 21:07:15,724 INFO L175 Difference]: Start difference. First operand has 303 places, 372 transitions, 5340 flow. Second operand 9 states and 134 transitions. [2024-06-27 21:07:15,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 400 transitions, 6466 flow [2024-06-27 21:07:17,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 400 transitions, 6100 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-27 21:07:17,390 INFO L231 Difference]: Finished difference. Result has 300 places, 378 transitions, 5187 flow [2024-06-27 21:07:17,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5187, PETRI_PLACES=300, PETRI_TRANSITIONS=378} [2024-06-27 21:07:17,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 21:07:17,391 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 378 transitions, 5187 flow [2024-06-27 21:07:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:17,391 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 21:07:17,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:07:17,392 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 21:07:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 711042404, now seen corresponding path program 1 times [2024-06-27 21:07:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828872882] [2024-06-27 21:07:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:07:17,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:17,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828872882] [2024-06-27 21:07:17,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828872882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:17,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:17,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723724774] [2024-06-27 21:07:17,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:17,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:17,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:17,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 378 transitions, 5187 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:17,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:17,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:17,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:19,264 INFO L124 PetriNetUnfolderBase]: 4161/6418 cut-off events. [2024-06-27 21:07:19,265 INFO L125 PetriNetUnfolderBase]: For 490433/490463 co-relation queries the response was YES. [2024-06-27 21:07:19,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51669 conditions, 6418 events. 4161/6418 cut-off events. For 490433/490463 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36936 event pairs, 831 based on Foata normal form. 24/6436 useless extension candidates. Maximal degree in co-relation 51524. Up to 6067 conditions per place. [2024-06-27 21:07:19,358 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 345 selfloop transitions, 72 changer transitions 0/420 dead transitions. [2024-06-27 21:07:19,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 420 transitions, 6868 flow [2024-06-27 21:07:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:07:19,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:07:19,359 INFO L175 Difference]: Start difference. First operand has 300 places, 378 transitions, 5187 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:07:19,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 420 transitions, 6868 flow [2024-06-27 21:07:20,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 420 transitions, 6760 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:20,896 INFO L231 Difference]: Finished difference. Result has 305 places, 392 transitions, 5657 flow [2024-06-27 21:07:20,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5657, PETRI_PLACES=305, PETRI_TRANSITIONS=392} [2024-06-27 21:07:20,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 21:07:20,896 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 392 transitions, 5657 flow [2024-06-27 21:07:20,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:20,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:20,897 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 21:07:20,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:07:20,897 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 21:07:20,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash 714767054, now seen corresponding path program 2 times [2024-06-27 21:07:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306159082] [2024-06-27 21:07:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:21,440 INFO 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 21:07:21,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:21,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306159082] [2024-06-27 21:07:21,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306159082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:21,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517914828] [2024-06-27 21:07:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:21,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:21,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:21,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 392 transitions, 5657 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:21,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:21,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:21,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:22,878 INFO L124 PetriNetUnfolderBase]: 4237/6523 cut-off events. [2024-06-27 21:07:22,878 INFO L125 PetriNetUnfolderBase]: For 531636/531666 co-relation queries the response was YES. [2024-06-27 21:07:22,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54551 conditions, 6523 events. 4237/6523 cut-off events. For 531636/531666 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37469 event pairs, 859 based on Foata normal form. 24/6541 useless extension candidates. Maximal degree in co-relation 54402. Up to 6274 conditions per place. [2024-06-27 21:07:22,973 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 64 changer transitions 0/430 dead transitions. [2024-06-27 21:07:22,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 430 transitions, 7284 flow [2024-06-27 21:07:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:07:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:07:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:07:22,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:07:22,974 INFO L175 Difference]: Start difference. First operand has 305 places, 392 transitions, 5657 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:07:22,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 430 transitions, 7284 flow [2024-06-27 21:07:25,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 430 transitions, 7003 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-27 21:07:25,049 INFO L231 Difference]: Finished difference. Result has 313 places, 404 transitions, 5897 flow [2024-06-27 21:07:25,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5436, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5897, PETRI_PLACES=313, PETRI_TRANSITIONS=404} [2024-06-27 21:07:25,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 21:07:25,051 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 5897 flow [2024-06-27 21:07:25,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:25,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:25,051 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 21:07:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:07:25,051 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 21:07:25,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978319, now seen corresponding path program 2 times [2024-06-27 21:07:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795407219] [2024-06-27 21:07:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:25,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:25,848 INFO 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 21:07:25,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:25,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795407219] [2024-06-27 21:07:25,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795407219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:25,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:25,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:25,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761216226] [2024-06-27 21:07:25,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:25,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:25,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:25,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:25,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 404 transitions, 5897 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:25,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:25,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:25,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:27,300 INFO L124 PetriNetUnfolderBase]: 4242/6532 cut-off events. [2024-06-27 21:07:27,301 INFO L125 PetriNetUnfolderBase]: For 533688/533688 co-relation queries the response was YES. [2024-06-27 21:07:27,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54458 conditions, 6532 events. 4242/6532 cut-off events. For 533688/533688 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37552 event pairs, 885 based on Foata normal form. 1/6531 useless extension candidates. Maximal degree in co-relation 54306. Up to 6486 conditions per place. [2024-06-27 21:07:27,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 396 selfloop transitions, 22 changer transitions 0/421 dead transitions. [2024-06-27 21:07:27,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 421 transitions, 6827 flow [2024-06-27 21:07:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-27 21:07:27,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2024-06-27 21:07:27,395 INFO L175 Difference]: Start difference. First operand has 313 places, 404 transitions, 5897 flow. Second operand 8 states and 114 transitions. [2024-06-27 21:07:27,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 421 transitions, 6827 flow [2024-06-27 21:07:29,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 421 transitions, 6614 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:29,376 INFO L231 Difference]: Finished difference. Result has 316 places, 407 transitions, 5794 flow [2024-06-27 21:07:29,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5684, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5794, PETRI_PLACES=316, PETRI_TRANSITIONS=407} [2024-06-27 21:07:29,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-27 21:07:29,377 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 407 transitions, 5794 flow [2024-06-27 21:07:29,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:29,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:29,377 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 21:07:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:07:29,377 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 21:07:29,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash 714761474, now seen corresponding path program 3 times [2024-06-27 21:07:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917181956] [2024-06-27 21:07:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:29,872 INFO 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 21:07:29,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917181956] [2024-06-27 21:07:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917181956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542650019] [2024-06-27 21:07:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:29,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:29,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:29,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:29,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 407 transitions, 5794 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:29,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:29,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:29,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:31,276 INFO L124 PetriNetUnfolderBase]: 4234/6520 cut-off events. [2024-06-27 21:07:31,276 INFO L125 PetriNetUnfolderBase]: For 540883/540913 co-relation queries the response was YES. [2024-06-27 21:07:31,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53822 conditions, 6520 events. 4234/6520 cut-off events. For 540883/540913 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37488 event pairs, 835 based on Foata normal form. 24/6538 useless extension candidates. Maximal degree in co-relation 53668. Up to 6278 conditions per place. [2024-06-27 21:07:31,366 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 366 selfloop transitions, 59 changer transitions 0/428 dead transitions. [2024-06-27 21:07:31,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 6886 flow [2024-06-27 21:07:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:07:31,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:07:31,368 INFO L175 Difference]: Start difference. First operand has 316 places, 407 transitions, 5794 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:07:31,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 6886 flow [2024-06-27 21:07:33,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 428 transitions, 6760 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:33,189 INFO L231 Difference]: Finished difference. Result has 318 places, 407 transitions, 5794 flow [2024-06-27 21:07:33,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5794, PETRI_PLACES=318, PETRI_TRANSITIONS=407} [2024-06-27 21:07:33,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-27 21:07:33,190 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 407 transitions, 5794 flow [2024-06-27 21:07:33,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:33,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:33,191 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 21:07:33,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:07:33,191 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 21:07:33,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash 144347992, now seen corresponding path program 4 times [2024-06-27 21:07:33,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:33,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368983876] [2024-06-27 21:07:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:33,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:33,694 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 21:07:33,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368983876] [2024-06-27 21:07:33,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368983876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:33,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:33,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:33,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419426055] [2024-06-27 21:07:33,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:33,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:33,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:33,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:33,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 407 transitions, 5794 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:33,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:33,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:33,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:35,188 INFO L124 PetriNetUnfolderBase]: 4286/6592 cut-off events. [2024-06-27 21:07:35,188 INFO L125 PetriNetUnfolderBase]: For 567869/567899 co-relation queries the response was YES. [2024-06-27 21:07:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55192 conditions, 6592 events. 4286/6592 cut-off events. For 567869/567899 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 37858 event pairs, 898 based on Foata normal form. 24/6610 useless extension candidates. Maximal degree in co-relation 55037. Up to 6303 conditions per place. [2024-06-27 21:07:35,272 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 372 selfloop transitions, 63 changer transitions 0/438 dead transitions. [2024-06-27 21:07:35,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 438 transitions, 7355 flow [2024-06-27 21:07:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:07:35,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:07:35,273 INFO L175 Difference]: Start difference. First operand has 318 places, 407 transitions, 5794 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:07:35,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 438 transitions, 7355 flow [2024-06-27 21:07:37,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 438 transitions, 7237 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:07:37,175 INFO L231 Difference]: Finished difference. Result has 320 places, 417 transitions, 6157 flow [2024-06-27 21:07:37,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5676, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6157, PETRI_PLACES=320, PETRI_TRANSITIONS=417} [2024-06-27 21:07:37,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 21:07:37,176 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 417 transitions, 6157 flow [2024-06-27 21:07:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:37,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:37,177 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 21:07:37,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:07:37,177 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 21:07:37,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash 354598850, now seen corresponding path program 5 times [2024-06-27 21:07:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284766669] [2024-06-27 21:07:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:37,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:37,786 INFO 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 21:07:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284766669] [2024-06-27 21:07:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284766669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:37,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:37,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596575109] [2024-06-27 21:07:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:37,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:37,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 417 transitions, 6157 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:37,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:37,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:37,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:39,204 INFO L124 PetriNetUnfolderBase]: 4278/6582 cut-off events. [2024-06-27 21:07:39,204 INFO L125 PetriNetUnfolderBase]: For 573745/573775 co-relation queries the response was YES. [2024-06-27 21:07:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55407 conditions, 6582 events. 4278/6582 cut-off events. For 573745/573775 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37877 event pairs, 850 based on Foata normal form. 24/6600 useless extension candidates. Maximal degree in co-relation 55249. Up to 6300 conditions per place. [2024-06-27 21:07:39,310 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 372 selfloop transitions, 65 changer transitions 0/440 dead transitions. [2024-06-27 21:07:39,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 440 transitions, 7305 flow [2024-06-27 21:07:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:07:39,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:07:39,312 INFO L175 Difference]: Start difference. First operand has 320 places, 417 transitions, 6157 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:07:39,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 440 transitions, 7305 flow [2024-06-27 21:07:41,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 440 transitions, 7049 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:41,237 INFO L231 Difference]: Finished difference. Result has 322 places, 417 transitions, 6040 flow [2024-06-27 21:07:41,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6040, PETRI_PLACES=322, PETRI_TRANSITIONS=417} [2024-06-27 21:07:41,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 21:07:41,237 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 417 transitions, 6040 flow [2024-06-27 21:07:41,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:41,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:41,238 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 21:07:41,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:07:41,238 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 21:07:41,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash 144342257, now seen corresponding path program 3 times [2024-06-27 21:07:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590122494] [2024-06-27 21:07:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:41,913 INFO 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 21:07:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590122494] [2024-06-27 21:07:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590122494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265527610] [2024-06-27 21:07:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:41,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:41,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 417 transitions, 6040 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:41,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:41,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:41,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:43,345 INFO L124 PetriNetUnfolderBase]: 4275/6580 cut-off events. [2024-06-27 21:07:43,345 INFO L125 PetriNetUnfolderBase]: For 572663/572663 co-relation queries the response was YES. [2024-06-27 21:07:43,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55021 conditions, 6580 events. 4275/6580 cut-off events. For 572663/572663 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37903 event pairs, 884 based on Foata normal form. 1/6579 useless extension candidates. Maximal degree in co-relation 54864. Up to 6519 conditions per place. [2024-06-27 21:07:43,438 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 408 selfloop transitions, 25 changer transitions 0/436 dead transitions. [2024-06-27 21:07:43,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 436 transitions, 6964 flow [2024-06-27 21:07:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:07:43,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:07:43,440 INFO L175 Difference]: Start difference. First operand has 322 places, 417 transitions, 6040 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:07:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 436 transitions, 6964 flow [2024-06-27 21:07:44,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 436 transitions, 6778 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:44,967 INFO L231 Difference]: Finished difference. Result has 324 places, 417 transitions, 5914 flow [2024-06-27 21:07:44,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5914, PETRI_PLACES=324, PETRI_TRANSITIONS=417} [2024-06-27 21:07:44,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 21:07:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 417 transitions, 5914 flow [2024-06-27 21:07:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:44,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:44,968 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 21:07:44,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:07:44,972 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 21:07:44,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 151707299, now seen corresponding path program 1 times [2024-06-27 21:07:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623621016] [2024-06-27 21:07:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:45,690 INFO 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 21:07:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623621016] [2024-06-27 21:07:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623621016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:45,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526898811] [2024-06-27 21:07:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:45,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:45,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 417 transitions, 5914 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:45,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:45,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:45,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:47,129 INFO L124 PetriNetUnfolderBase]: 4269/6570 cut-off events. [2024-06-27 21:07:47,129 INFO L125 PetriNetUnfolderBase]: For 582490/582520 co-relation queries the response was YES. [2024-06-27 21:07:47,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54690 conditions, 6570 events. 4269/6570 cut-off events. For 582490/582520 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37813 event pairs, 855 based on Foata normal form. 22/6586 useless extension candidates. Maximal degree in co-relation 54532. Up to 6479 conditions per place. [2024-06-27 21:07:47,228 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 396 selfloop transitions, 33 changer transitions 0/432 dead transitions. [2024-06-27 21:07:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 432 transitions, 6882 flow [2024-06-27 21:07:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:07:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:07:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 21:07:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:07:47,230 INFO L175 Difference]: Start difference. First operand has 324 places, 417 transitions, 5914 flow. Second operand 6 states and 95 transitions. [2024-06-27 21:07:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 432 transitions, 6882 flow [2024-06-27 21:07:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 432 transitions, 6822 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:07:49,463 INFO L231 Difference]: Finished difference. Result has 324 places, 420 transitions, 6000 flow [2024-06-27 21:07:49,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6000, PETRI_PLACES=324, PETRI_TRANSITIONS=420} [2024-06-27 21:07:49,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 21:07:49,464 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 420 transitions, 6000 flow [2024-06-27 21:07:49,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:49,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:49,464 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 21:07:49,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:07:49,464 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 21:07:49,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash 151699642, now seen corresponding path program 6 times [2024-06-27 21:07:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253515604] [2024-06-27 21:07:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:49,972 INFO 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 21:07:49,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:49,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253515604] [2024-06-27 21:07:49,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253515604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:49,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:49,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051874587] [2024-06-27 21:07:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:50,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:50,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 420 transitions, 6000 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:50,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:50,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:50,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:51,489 INFO L124 PetriNetUnfolderBase]: 4273/6576 cut-off events. [2024-06-27 21:07:51,490 INFO L125 PetriNetUnfolderBase]: For 594865/594895 co-relation queries the response was YES. [2024-06-27 21:07:51,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54935 conditions, 6576 events. 4273/6576 cut-off events. For 594865/594895 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37746 event pairs, 899 based on Foata normal form. 24/6594 useless extension candidates. Maximal degree in co-relation 54776. Up to 6486 conditions per place. [2024-06-27 21:07:51,586 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 407 selfloop transitions, 28 changer transitions 0/438 dead transitions. [2024-06-27 21:07:51,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 438 transitions, 7043 flow [2024-06-27 21:07:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:07:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:07:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-27 21:07:51,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 21:07:51,588 INFO L175 Difference]: Start difference. First operand has 324 places, 420 transitions, 6000 flow. Second operand 7 states and 106 transitions. [2024-06-27 21:07:51,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 438 transitions, 7043 flow [2024-06-27 21:07:53,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 438 transitions, 6930 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:53,848 INFO L231 Difference]: Finished difference. Result has 326 places, 424 transitions, 6071 flow [2024-06-27 21:07:53,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6071, PETRI_PLACES=326, PETRI_TRANSITIONS=424} [2024-06-27 21:07:53,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-27 21:07:53,849 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 424 transitions, 6071 flow [2024-06-27 21:07:53,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:53,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:53,849 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 21:07:53,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:07:53,850 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 21:07:53,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:53,850 INFO L85 PathProgramCache]: Analyzing trace with hash -940113525, now seen corresponding path program 1 times [2024-06-27 21:07:53,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:53,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093248643] [2024-06-27 21:07:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:53,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:54,358 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 21:07:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:54,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093248643] [2024-06-27 21:07:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093248643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:54,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:54,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101991283] [2024-06-27 21:07:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:54,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:54,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:54,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:54,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 424 transitions, 6071 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:54,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:54,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:54,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:07:55,810 INFO L124 PetriNetUnfolderBase]: 4286/6592 cut-off events. [2024-06-27 21:07:55,810 INFO L125 PetriNetUnfolderBase]: For 589845/589849 co-relation queries the response was YES. [2024-06-27 21:07:55,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55246 conditions, 6592 events. 4286/6592 cut-off events. For 589845/589849 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37890 event pairs, 850 based on Foata normal form. 5/6595 useless extension candidates. Maximal degree in co-relation 55087. Up to 6473 conditions per place. [2024-06-27 21:07:55,897 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 43 changer transitions 0/457 dead transitions. [2024-06-27 21:07:55,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 457 transitions, 7385 flow [2024-06-27 21:07:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:07:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:07:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:07:55,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:07:55,898 INFO L175 Difference]: Start difference. First operand has 326 places, 424 transitions, 6071 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:07:55,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 457 transitions, 7385 flow [2024-06-27 21:07:57,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 457 transitions, 7242 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 21:07:57,984 INFO L231 Difference]: Finished difference. Result has 330 places, 430 transitions, 6193 flow [2024-06-27 21:07:57,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6193, PETRI_PLACES=330, PETRI_TRANSITIONS=430} [2024-06-27 21:07:57,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 21:07:57,985 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 430 transitions, 6193 flow [2024-06-27 21:07:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:57,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:07:57,985 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 21:07:57,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:07:57,985 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 21:07:57,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:07:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2039513069, now seen corresponding path program 2 times [2024-06-27 21:07:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:07:57,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501750076] [2024-06-27 21:07:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:07:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:07:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:07:58,503 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 21:07:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:07:58,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501750076] [2024-06-27 21:07:58,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501750076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:07:58,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:07:58,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:07:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831957907] [2024-06-27 21:07:58,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:07:58,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:07:58,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:07:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:07:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:07:58,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:07:58,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 430 transitions, 6193 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:07:58,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:07:58,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:07:58,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:00,082 INFO L124 PetriNetUnfolderBase]: 4283/6588 cut-off events. [2024-06-27 21:08:00,082 INFO L125 PetriNetUnfolderBase]: For 599332/599336 co-relation queries the response was YES. [2024-06-27 21:08:00,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55193 conditions, 6588 events. 4283/6588 cut-off events. For 599332/599336 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37862 event pairs, 893 based on Foata normal form. 5/6591 useless extension candidates. Maximal degree in co-relation 55032. Up to 6497 conditions per place. [2024-06-27 21:08:00,162 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 415 selfloop transitions, 34 changer transitions 0/452 dead transitions. [2024-06-27 21:08:00,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 452 transitions, 7169 flow [2024-06-27 21:08:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:08:00,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:08:00,164 INFO L175 Difference]: Start difference. First operand has 330 places, 430 transitions, 6193 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:08:00,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 452 transitions, 7169 flow [2024-06-27 21:08:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 452 transitions, 7046 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:02,374 INFO L231 Difference]: Finished difference. Result has 334 places, 430 transitions, 6144 flow [2024-06-27 21:08:02,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6144, PETRI_PLACES=334, PETRI_TRANSITIONS=430} [2024-06-27 21:08:02,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-27 21:08:02,374 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 430 transitions, 6144 flow [2024-06-27 21:08:02,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:02,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:02,375 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 21:08:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:08:02,375 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 21:08:02,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2078322707, now seen corresponding path program 3 times [2024-06-27 21:08:02,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:02,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682710054] [2024-06-27 21:08:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:02,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:02,840 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 21:08:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682710054] [2024-06-27 21:08:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682710054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576115097] [2024-06-27 21:08:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:02,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:02,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 430 transitions, 6144 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:02,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:02,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:02,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:04,292 INFO L124 PetriNetUnfolderBase]: 4298/6609 cut-off events. [2024-06-27 21:08:04,292 INFO L125 PetriNetUnfolderBase]: For 612400/612404 co-relation queries the response was YES. [2024-06-27 21:08:04,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55542 conditions, 6609 events. 4298/6609 cut-off events. For 612400/612404 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37985 event pairs, 852 based on Foata normal form. 5/6612 useless extension candidates. Maximal degree in co-relation 55380. Up to 6538 conditions per place. [2024-06-27 21:08:04,391 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 423 selfloop transitions, 31 changer transitions 0/457 dead transitions. [2024-06-27 21:08:04,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 457 transitions, 7342 flow [2024-06-27 21:08:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 21:08:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:08:04,393 INFO L175 Difference]: Start difference. First operand has 334 places, 430 transitions, 6144 flow. Second operand 8 states and 120 transitions. [2024-06-27 21:08:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 457 transitions, 7342 flow [2024-06-27 21:08:06,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 457 transitions, 7218 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:06,433 INFO L231 Difference]: Finished difference. Result has 338 places, 439 transitions, 6337 flow [2024-06-27 21:08:06,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6032, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6337, PETRI_PLACES=338, PETRI_TRANSITIONS=439} [2024-06-27 21:08:06,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-27 21:08:06,433 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 439 transitions, 6337 flow [2024-06-27 21:08:06,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:06,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:06,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:08:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:08:06,434 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 21:08:06,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:06,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2089935063, now seen corresponding path program 4 times [2024-06-27 21:08:06,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606957338] [2024-06-27 21:08:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:06,922 INFO 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 21:08:06,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606957338] [2024-06-27 21:08:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606957338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:06,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27059902] [2024-06-27 21:08:06,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:06,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:06,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:07,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:07,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 439 transitions, 6337 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:07,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:07,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:08,416 INFO L124 PetriNetUnfolderBase]: 4351/6684 cut-off events. [2024-06-27 21:08:08,417 INFO L125 PetriNetUnfolderBase]: For 649805/649835 co-relation queries the response was YES. [2024-06-27 21:08:08,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57074 conditions, 6684 events. 4351/6684 cut-off events. For 649805/649835 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38350 event pairs, 864 based on Foata normal form. 21/6699 useless extension candidates. Maximal degree in co-relation 56910. Up to 6226 conditions per place. [2024-06-27 21:08:08,518 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 359 selfloop transitions, 116 changer transitions 0/478 dead transitions. [2024-06-27 21:08:08,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 478 transitions, 8184 flow [2024-06-27 21:08:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:08:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:08:08,519 INFO L175 Difference]: Start difference. First operand has 338 places, 439 transitions, 6337 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:08:08,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 478 transitions, 8184 flow [2024-06-27 21:08:10,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 478 transitions, 8042 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:10,526 INFO L231 Difference]: Finished difference. Result has 341 places, 450 transitions, 6730 flow [2024-06-27 21:08:10,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6730, PETRI_PLACES=341, PETRI_TRANSITIONS=450} [2024-06-27 21:08:10,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 21:08:10,526 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 450 transitions, 6730 flow [2024-06-27 21:08:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:10,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:10,527 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 21:08:10,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:08:10,527 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 21:08:10,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2089815093, now seen corresponding path program 5 times [2024-06-27 21:08:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:10,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36603100] [2024-06-27 21:08:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:10,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:11,210 INFO 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 21:08:11,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36603100] [2024-06-27 21:08:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36603100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:11,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:11,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115577652] [2024-06-27 21:08:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:11,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:11,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:11,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 450 transitions, 6730 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:11,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:11,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:11,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:12,818 INFO L124 PetriNetUnfolderBase]: 4361/6698 cut-off events. [2024-06-27 21:08:12,818 INFO L125 PetriNetUnfolderBase]: For 664921/664951 co-relation queries the response was YES. [2024-06-27 21:08:12,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57753 conditions, 6698 events. 4361/6698 cut-off events. For 664921/664951 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38490 event pairs, 849 based on Foata normal form. 21/6713 useless extension candidates. Maximal degree in co-relation 57588. Up to 6502 conditions per place. [2024-06-27 21:08:12,921 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 412 selfloop transitions, 62 changer transitions 0/477 dead transitions. [2024-06-27 21:08:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 477 transitions, 7891 flow [2024-06-27 21:08:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:12,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:08:12,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 21:08:12,922 INFO L175 Difference]: Start difference. First operand has 341 places, 450 transitions, 6730 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:08:12,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 477 transitions, 7891 flow [2024-06-27 21:08:14,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 477 transitions, 7551 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:14,998 INFO L231 Difference]: Finished difference. Result has 344 places, 456 transitions, 6657 flow [2024-06-27 21:08:14,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6657, PETRI_PLACES=344, PETRI_TRANSITIONS=456} [2024-06-27 21:08:14,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-27 21:08:14,999 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 456 transitions, 6657 flow [2024-06-27 21:08:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:14,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:14,999 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 21:08:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:08:15,000 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 21:08:15,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash 691993129, now seen corresponding path program 6 times [2024-06-27 21:08:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:15,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592567853] [2024-06-27 21:08:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:15,511 INFO 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 21:08:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592567853] [2024-06-27 21:08:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592567853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:15,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:15,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:15,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081960609] [2024-06-27 21:08:15,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:15,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:15,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 456 transitions, 6657 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:15,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:15,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:15,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:16,968 INFO L124 PetriNetUnfolderBase]: 4366/6705 cut-off events. [2024-06-27 21:08:16,969 INFO L125 PetriNetUnfolderBase]: For 676866/676896 co-relation queries the response was YES. [2024-06-27 21:08:17,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57476 conditions, 6705 events. 4366/6705 cut-off events. For 676866/676896 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38531 event pairs, 847 based on Foata normal form. 21/6720 useless extension candidates. Maximal degree in co-relation 57311. Up to 6236 conditions per place. [2024-06-27 21:08:17,060 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 361 selfloop transitions, 122 changer transitions 0/486 dead transitions. [2024-06-27 21:08:17,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 486 transitions, 8140 flow [2024-06-27 21:08:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:08:17,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:08:17,061 INFO L175 Difference]: Start difference. First operand has 344 places, 456 transitions, 6657 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:08:17,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 486 transitions, 8140 flow [2024-06-27 21:08:19,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 486 transitions, 7972 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:19,541 INFO L231 Difference]: Finished difference. Result has 347 places, 459 transitions, 6814 flow [2024-06-27 21:08:19,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6814, PETRI_PLACES=347, PETRI_TRANSITIONS=459} [2024-06-27 21:08:19,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 21:08:19,541 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 459 transitions, 6814 flow [2024-06-27 21:08:19,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:19,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:19,542 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 21:08:19,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:08:19,542 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 21:08:19,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 703420969, now seen corresponding path program 7 times [2024-06-27 21:08:19,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:19,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276795470] [2024-06-27 21:08:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:19,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:20,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276795470] [2024-06-27 21:08:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276795470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425309322] [2024-06-27 21:08:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:20,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:20,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 459 transitions, 6814 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:20,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:20,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:20,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:21,502 INFO L124 PetriNetUnfolderBase]: 4353/6687 cut-off events. [2024-06-27 21:08:21,503 INFO L125 PetriNetUnfolderBase]: For 687728/687758 co-relation queries the response was YES. [2024-06-27 21:08:21,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57531 conditions, 6687 events. 4353/6687 cut-off events. For 687728/687758 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38378 event pairs, 853 based on Foata normal form. 23/6704 useless extension candidates. Maximal degree in co-relation 57365. Up to 6224 conditions per place. [2024-06-27 21:08:21,611 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 366 selfloop transitions, 114 changer transitions 0/483 dead transitions. [2024-06-27 21:08:21,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 483 transitions, 8048 flow [2024-06-27 21:08:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:08:21,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:08:21,612 INFO L175 Difference]: Start difference. First operand has 347 places, 459 transitions, 6814 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:08:21,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 483 transitions, 8048 flow [2024-06-27 21:08:24,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 483 transitions, 7675 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:24,042 INFO L231 Difference]: Finished difference. Result has 349 places, 459 transitions, 6677 flow [2024-06-27 21:08:24,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6441, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6677, PETRI_PLACES=349, PETRI_TRANSITIONS=459} [2024-06-27 21:08:24,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-27 21:08:24,042 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 459 transitions, 6677 flow [2024-06-27 21:08:24,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:24,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:24,043 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 21:08:24,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:08:24,043 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 21:08:24,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash 818712139, now seen corresponding path program 8 times [2024-06-27 21:08:24,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511883631] [2024-06-27 21:08:24,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:24,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:24,565 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 21:08:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511883631] [2024-06-27 21:08:24,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511883631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:24,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:24,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:24,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860860967] [2024-06-27 21:08:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:24,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:24,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:24,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:24,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 459 transitions, 6677 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:24,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:24,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:24,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:26,074 INFO L124 PetriNetUnfolderBase]: 4344/6675 cut-off events. [2024-06-27 21:08:26,074 INFO L125 PetriNetUnfolderBase]: For 691055/691085 co-relation queries the response was YES. [2024-06-27 21:08:26,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57136 conditions, 6675 events. 4344/6675 cut-off events. For 691055/691085 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38335 event pairs, 849 based on Foata normal form. 23/6692 useless extension candidates. Maximal degree in co-relation 56969. Up to 6407 conditions per place. [2024-06-27 21:08:26,177 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 404 selfloop transitions, 73 changer transitions 0/480 dead transitions. [2024-06-27 21:08:26,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 480 transitions, 7897 flow [2024-06-27 21:08:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:08:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:08:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:08:26,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:08:26,178 INFO L175 Difference]: Start difference. First operand has 349 places, 459 transitions, 6677 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:08:26,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 480 transitions, 7897 flow [2024-06-27 21:08:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 480 transitions, 7649 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:28,385 INFO L231 Difference]: Finished difference. Result has 350 places, 459 transitions, 6584 flow [2024-06-27 21:08:28,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6429, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=350, PETRI_TRANSITIONS=459} [2024-06-27 21:08:28,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 21:08:28,385 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 459 transitions, 6584 flow [2024-06-27 21:08:28,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:28,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:28,386 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 21:08:28,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:08:28,386 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 21:08:28,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash 474388939, now seen corresponding path program 9 times [2024-06-27 21:08:28,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:28,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556468743] [2024-06-27 21:08:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:28,886 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 21:08:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:28,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556468743] [2024-06-27 21:08:28,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556468743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:28,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:28,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:28,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721154775] [2024-06-27 21:08:28,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:28,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:28,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 459 transitions, 6584 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:28,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:28,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:28,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:30,452 INFO L124 PetriNetUnfolderBase]: 4331/6657 cut-off events. [2024-06-27 21:08:30,452 INFO L125 PetriNetUnfolderBase]: For 693740/693770 co-relation queries the response was YES. [2024-06-27 21:08:30,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56678 conditions, 6657 events. 4331/6657 cut-off events. For 693740/693770 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38218 event pairs, 850 based on Foata normal form. 23/6674 useless extension candidates. Maximal degree in co-relation 56510. Up to 6395 conditions per place. [2024-06-27 21:08:30,558 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 403 selfloop transitions, 77 changer transitions 0/483 dead transitions. [2024-06-27 21:08:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 483 transitions, 7660 flow [2024-06-27 21:08:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:08:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:08:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:08:30,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-27 21:08:30,559 INFO L175 Difference]: Start difference. First operand has 350 places, 459 transitions, 6584 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:08:30,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 483 transitions, 7660 flow [2024-06-27 21:08:33,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 483 transitions, 7432 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:08:33,237 INFO L231 Difference]: Finished difference. Result has 355 places, 459 transitions, 6517 flow [2024-06-27 21:08:33,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6517, PETRI_PLACES=355, PETRI_TRANSITIONS=459} [2024-06-27 21:08:33,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-27 21:08:33,238 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 459 transitions, 6517 flow [2024-06-27 21:08:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:33,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:33,239 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 21:08:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:08:33,239 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 21:08:33,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1899016781, now seen corresponding path program 10 times [2024-06-27 21:08:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:33,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236888094] [2024-06-27 21:08:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:33,721 INFO 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 21:08:33,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236888094] [2024-06-27 21:08:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236888094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:33,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739216493] [2024-06-27 21:08:33,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:33,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:33,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:33,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:33,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 459 transitions, 6517 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:33,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:33,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:33,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:35,256 INFO L124 PetriNetUnfolderBase]: 4308/6621 cut-off events. [2024-06-27 21:08:35,256 INFO L125 PetriNetUnfolderBase]: For 694775/694779 co-relation queries the response was YES. [2024-06-27 21:08:35,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56160 conditions, 6621 events. 4308/6621 cut-off events. For 694775/694779 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38018 event pairs, 889 based on Foata normal form. 7/6626 useless extension candidates. Maximal degree in co-relation 55991. Up to 6507 conditions per place. [2024-06-27 21:08:35,341 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 437 selfloop transitions, 44 changer transitions 0/484 dead transitions. [2024-06-27 21:08:35,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 484 transitions, 7575 flow [2024-06-27 21:08:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:08:35,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 21:08:35,343 INFO L175 Difference]: Start difference. First operand has 355 places, 459 transitions, 6517 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:08:35,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 484 transitions, 7575 flow [2024-06-27 21:08:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 484 transitions, 7319 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 21:08:37,861 INFO L231 Difference]: Finished difference. Result has 352 places, 459 transitions, 6364 flow [2024-06-27 21:08:37,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6364, PETRI_PLACES=352, PETRI_TRANSITIONS=459} [2024-06-27 21:08:37,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 21:08:37,862 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 459 transitions, 6364 flow [2024-06-27 21:08:37,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:37,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:37,862 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 21:08:37,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:08:37,862 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 21:08:37,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 179397323, now seen corresponding path program 11 times [2024-06-27 21:08:37,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:37,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697559061] [2024-06-27 21:08:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697559061] [2024-06-27 21:08:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697559061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:38,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:38,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296721101] [2024-06-27 21:08:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:38,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:38,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:38,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:38,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 459 transitions, 6364 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:39,854 INFO L124 PetriNetUnfolderBase]: 4299/6611 cut-off events. [2024-06-27 21:08:39,854 INFO L125 PetriNetUnfolderBase]: For 696693/696723 co-relation queries the response was YES. [2024-06-27 21:08:39,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55690 conditions, 6611 events. 4299/6611 cut-off events. For 696693/696723 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37977 event pairs, 855 based on Foata normal form. 23/6628 useless extension candidates. Maximal degree in co-relation 55520. Up to 6315 conditions per place. [2024-06-27 21:08:39,954 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 403 selfloop transitions, 78 changer transitions 0/484 dead transitions. [2024-06-27 21:08:39,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 484 transitions, 7606 flow [2024-06-27 21:08:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 21:08:39,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 21:08:39,956 INFO L175 Difference]: Start difference. First operand has 352 places, 459 transitions, 6364 flow. Second operand 7 states and 123 transitions. [2024-06-27 21:08:39,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 484 transitions, 7606 flow [2024-06-27 21:08:43,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 484 transitions, 7448 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:08:43,431 INFO L231 Difference]: Finished difference. Result has 353 places, 459 transitions, 6375 flow [2024-06-27 21:08:43,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6375, PETRI_PLACES=353, PETRI_TRANSITIONS=459} [2024-06-27 21:08:43,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 21:08:43,431 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 459 transitions, 6375 flow [2024-06-27 21:08:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:43,432 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 21:08:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:08:43,432 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 21:08:43,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 179634473, now seen corresponding path program 12 times [2024-06-27 21:08:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:43,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948052733] [2024-06-27 21:08:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:08:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:43,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948052733] [2024-06-27 21:08:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948052733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282899850] [2024-06-27 21:08:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:43,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:44,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:44,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 459 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:44,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:44,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:44,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:45,394 INFO L124 PetriNetUnfolderBase]: 4286/6593 cut-off events. [2024-06-27 21:08:45,394 INFO L125 PetriNetUnfolderBase]: For 684268/684298 co-relation queries the response was YES. [2024-06-27 21:08:45,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55321 conditions, 6593 events. 4286/6593 cut-off events. For 684268/684298 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37869 event pairs, 883 based on Foata normal form. 23/6610 useless extension candidates. Maximal degree in co-relation 55150. Up to 6303 conditions per place. [2024-06-27 21:08:45,496 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 401 selfloop transitions, 79 changer transitions 0/483 dead transitions. [2024-06-27 21:08:45,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 483 transitions, 7435 flow [2024-06-27 21:08:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:08:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:08:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:08:45,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 21:08:45,497 INFO L175 Difference]: Start difference. First operand has 353 places, 459 transitions, 6375 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:08:45,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 483 transitions, 7435 flow [2024-06-27 21:08:47,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 483 transitions, 7167 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 21:08:47,970 INFO L231 Difference]: Finished difference. Result has 353 places, 459 transitions, 6279 flow [2024-06-27 21:08:47,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6279, PETRI_PLACES=353, PETRI_TRANSITIONS=459} [2024-06-27 21:08:47,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 21:08:47,971 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 459 transitions, 6279 flow [2024-06-27 21:08:47,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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 21:08:47,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:47,971 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 21:08:47,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:08:47,972 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 21:08:47,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash 402009377, now seen corresponding path program 1 times [2024-06-27 21:08:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838946417] [2024-06-27 21:08:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:48,780 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 21:08:48,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:48,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838946417] [2024-06-27 21:08:48,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838946417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:48,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:48,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515089016] [2024-06-27 21:08:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:48,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:48,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:48,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 459 transitions, 6279 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:48,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:48,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:48,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:50,274 INFO L124 PetriNetUnfolderBase]: 4294/6603 cut-off events. [2024-06-27 21:08:50,274 INFO L125 PetriNetUnfolderBase]: For 678903/678907 co-relation queries the response was YES. [2024-06-27 21:08:50,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55327 conditions, 6603 events. 4294/6603 cut-off events. For 678903/678907 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37910 event pairs, 897 based on Foata normal form. 6/6607 useless extension candidates. Maximal degree in co-relation 55156. Up to 6523 conditions per place. [2024-06-27 21:08:50,376 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 444 selfloop transitions, 31 changer transitions 0/478 dead transitions. [2024-06-27 21:08:50,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 478 transitions, 7331 flow [2024-06-27 21:08:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 21:08:50,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:08:50,377 INFO L175 Difference]: Start difference. First operand has 353 places, 459 transitions, 6279 flow. Second operand 6 states and 100 transitions. [2024-06-27 21:08:50,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 478 transitions, 7331 flow [2024-06-27 21:08:53,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 478 transitions, 7110 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 21:08:53,235 INFO L231 Difference]: Finished difference. Result has 351 places, 461 transitions, 6175 flow [2024-06-27 21:08:53,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6175, PETRI_PLACES=351, PETRI_TRANSITIONS=461} [2024-06-27 21:08:53,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-27 21:08:53,236 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 461 transitions, 6175 flow [2024-06-27 21:08:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:53,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:53,236 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 21:08:53,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:08:53,236 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 21:08:53,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash 416294177, now seen corresponding path program 2 times [2024-06-27 21:08:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684665758] [2024-06-27 21:08:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:53,859 INFO 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 21:08:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684665758] [2024-06-27 21:08:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684665758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:53,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:53,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:08:53,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347823939] [2024-06-27 21:08:53,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:08:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:08:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:08:53,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:53,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 461 transitions, 6175 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:53,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:53,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:53,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:08:55,287 INFO L124 PetriNetUnfolderBase]: 4289/6598 cut-off events. [2024-06-27 21:08:55,287 INFO L125 PetriNetUnfolderBase]: For 672286/672316 co-relation queries the response was YES. [2024-06-27 21:08:55,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54909 conditions, 6598 events. 4289/6598 cut-off events. For 672286/672316 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37888 event pairs, 863 based on Foata normal form. 22/6614 useless extension candidates. Maximal degree in co-relation 54738. Up to 6496 conditions per place. [2024-06-27 21:08:55,382 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 444 selfloop transitions, 29 changer transitions 0/476 dead transitions. [2024-06-27 21:08:55,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 476 transitions, 7213 flow [2024-06-27 21:08:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:08:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:08:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-27 21:08:55,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:08:55,383 INFO L175 Difference]: Start difference. First operand has 351 places, 461 transitions, 6175 flow. Second operand 6 states and 92 transitions. [2024-06-27 21:08:55,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 476 transitions, 7213 flow [2024-06-27 21:08:58,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 476 transitions, 7112 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:08:58,211 INFO L231 Difference]: Finished difference. Result has 353 places, 463 transitions, 6191 flow [2024-06-27 21:08:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6191, PETRI_PLACES=353, PETRI_TRANSITIONS=463} [2024-06-27 21:08:58,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 21:08:58,212 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 463 transitions, 6191 flow [2024-06-27 21:08:58,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:08:58,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:08:58,212 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 21:08:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:08:58,212 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 21:08:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:08:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 700572937, now seen corresponding path program 1 times [2024-06-27 21:08:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:08:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120682794] [2024-06-27 21:08:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:08:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:08:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:08:58,875 INFO 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 21:08:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:08:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120682794] [2024-06-27 21:08:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120682794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:08:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:08:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:08:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012888437] [2024-06-27 21:08:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:08:58,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:08:58,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:08:58,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:08:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:08:58,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:08:58,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 463 transitions, 6191 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:08:58,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:08:58,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:08:58,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:00,298 INFO L124 PetriNetUnfolderBase]: 4297/6612 cut-off events. [2024-06-27 21:09:00,298 INFO L125 PetriNetUnfolderBase]: For 687226/687226 co-relation queries the response was YES. [2024-06-27 21:09:00,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55258 conditions, 6612 events. 4297/6612 cut-off events. For 687226/687226 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 37981 event pairs, 881 based on Foata normal form. 2/6612 useless extension candidates. Maximal degree in co-relation 55086. Up to 6495 conditions per place. [2024-06-27 21:09:00,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 448 selfloop transitions, 43 changer transitions 0/494 dead transitions. [2024-06-27 21:09:00,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 494 transitions, 7579 flow [2024-06-27 21:09:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 21:09:00,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:09:00,401 INFO L175 Difference]: Start difference. First operand has 353 places, 463 transitions, 6191 flow. Second operand 9 states and 138 transitions. [2024-06-27 21:09:00,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 494 transitions, 7579 flow [2024-06-27 21:09:03,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 494 transitions, 7478 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:03,554 INFO L231 Difference]: Finished difference. Result has 358 places, 467 transitions, 6333 flow [2024-06-27 21:09:03,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6090, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6333, PETRI_PLACES=358, PETRI_TRANSITIONS=467} [2024-06-27 21:09:03,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-27 21:09:03,554 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 467 transitions, 6333 flow [2024-06-27 21:09:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:03,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:03,555 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 21:09:03,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:09:03,555 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 21:09:03,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 700633387, now seen corresponding path program 2 times [2024-06-27 21:09:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685525221] [2024-06-27 21:09:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:04,207 INFO 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 21:09:04,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685525221] [2024-06-27 21:09:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685525221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:04,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:04,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:04,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010745939] [2024-06-27 21:09:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:04,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:04,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:04,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:04,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 467 transitions, 6333 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:04,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:04,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:04,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:05,774 INFO L124 PetriNetUnfolderBase]: 4305/6624 cut-off events. [2024-06-27 21:09:05,774 INFO L125 PetriNetUnfolderBase]: For 703138/703138 co-relation queries the response was YES. [2024-06-27 21:09:05,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55645 conditions, 6624 events. 4305/6624 cut-off events. For 703138/703138 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38071 event pairs, 920 based on Foata normal form. 2/6624 useless extension candidates. Maximal degree in co-relation 55472. Up to 6540 conditions per place. [2024-06-27 21:09:05,881 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 448 selfloop transitions, 41 changer transitions 0/492 dead transitions. [2024-06-27 21:09:05,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 492 transitions, 7455 flow [2024-06-27 21:09:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-27 21:09:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-27 21:09:05,883 INFO L175 Difference]: Start difference. First operand has 358 places, 467 transitions, 6333 flow. Second operand 10 states and 144 transitions. [2024-06-27 21:09:05,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 492 transitions, 7455 flow [2024-06-27 21:09:08,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 492 transitions, 7286 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:08,215 INFO L231 Difference]: Finished difference. Result has 363 places, 469 transitions, 6333 flow [2024-06-27 21:09:08,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6333, PETRI_PLACES=363, PETRI_TRANSITIONS=469} [2024-06-27 21:09:08,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 21:09:08,216 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 469 transitions, 6333 flow [2024-06-27 21:09:08,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:08,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:08,216 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 21:09:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:09:08,217 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 21:09:08,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash 700633511, now seen corresponding path program 1 times [2024-06-27 21:09:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:08,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856073449] [2024-06-27 21:09:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:08,855 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 21:09:08,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:08,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856073449] [2024-06-27 21:09:08,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856073449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:08,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:08,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:08,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581715365] [2024-06-27 21:09:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:08,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:08,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:08,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:08,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 469 transitions, 6333 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:08,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:08,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:08,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:10,387 INFO L124 PetriNetUnfolderBase]: 4450/6828 cut-off events. [2024-06-27 21:09:10,388 INFO L125 PetriNetUnfolderBase]: For 791956/791974 co-relation queries the response was YES. [2024-06-27 21:09:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58497 conditions, 6828 events. 4450/6828 cut-off events. For 791956/791974 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 39392 event pairs, 778 based on Foata normal form. 14/6828 useless extension candidates. Maximal degree in co-relation 58322. Up to 4962 conditions per place. [2024-06-27 21:09:10,494 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 316 selfloop transitions, 212 changer transitions 0/531 dead transitions. [2024-06-27 21:09:10,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 531 transitions, 8950 flow [2024-06-27 21:09:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:09:10,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-27 21:09:10,496 INFO L175 Difference]: Start difference. First operand has 363 places, 469 transitions, 6333 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:09:10,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 531 transitions, 8950 flow [2024-06-27 21:09:13,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 531 transitions, 8822 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 21:09:13,975 INFO L231 Difference]: Finished difference. Result has 366 places, 489 transitions, 7260 flow [2024-06-27 21:09:13,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6210, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7260, PETRI_PLACES=366, PETRI_TRANSITIONS=489} [2024-06-27 21:09:13,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 21:09:13,976 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 489 transitions, 7260 flow [2024-06-27 21:09:13,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:13,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:13,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:09:13,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:09:13,976 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 21:09:13,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:13,977 INFO L85 PathProgramCache]: Analyzing trace with hash 703434671, now seen corresponding path program 2 times [2024-06-27 21:09:13,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:13,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143903261] [2024-06-27 21:09:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:09:14,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143903261] [2024-06-27 21:09:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143903261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:14,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:14,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977612635] [2024-06-27 21:09:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:14,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:14,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 489 transitions, 7260 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:14,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:14,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:14,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:16,433 INFO L124 PetriNetUnfolderBase]: 4578/7006 cut-off events. [2024-06-27 21:09:16,434 INFO L125 PetriNetUnfolderBase]: For 867941/867959 co-relation queries the response was YES. [2024-06-27 21:09:16,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63724 conditions, 7006 events. 4578/7006 cut-off events. For 867941/867959 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40416 event pairs, 790 based on Foata normal form. 14/7006 useless extension candidates. Maximal degree in co-relation 63546. Up to 5541 conditions per place. [2024-06-27 21:09:16,544 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 341 selfloop transitions, 193 changer transitions 0/537 dead transitions. [2024-06-27 21:09:16,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 537 transitions, 9672 flow [2024-06-27 21:09:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:09:16,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-27 21:09:16,545 INFO L175 Difference]: Start difference. First operand has 366 places, 489 transitions, 7260 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:09:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 537 transitions, 9672 flow [2024-06-27 21:09:19,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 537 transitions, 9146 flow, removed 157 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:19,810 INFO L231 Difference]: Finished difference. Result has 371 places, 501 transitions, 7530 flow [2024-06-27 21:09:19,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6794, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7530, PETRI_PLACES=371, PETRI_TRANSITIONS=501} [2024-06-27 21:09:19,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 21:09:19,811 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 501 transitions, 7530 flow [2024-06-27 21:09:19,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:19,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:19,811 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 21:09:19,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:09:19,812 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 21:09:19,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash 703430021, now seen corresponding path program 3 times [2024-06-27 21:09:19,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:19,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513261859] [2024-06-27 21:09:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:19,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:20,516 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 21:09:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513261859] [2024-06-27 21:09:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513261859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:20,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:20,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:20,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142790854] [2024-06-27 21:09:20,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:20,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:20,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 501 transitions, 7530 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:22,234 INFO L124 PetriNetUnfolderBase]: 4702/7179 cut-off events. [2024-06-27 21:09:22,234 INFO L125 PetriNetUnfolderBase]: For 913269/913287 co-relation queries the response was YES. [2024-06-27 21:09:22,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65457 conditions, 7179 events. 4702/7179 cut-off events. For 913269/913287 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41402 event pairs, 794 based on Foata normal form. 14/7179 useless extension candidates. Maximal degree in co-relation 65278. Up to 5599 conditions per place. [2024-06-27 21:09:22,340 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 348 selfloop transitions, 197 changer transitions 0/548 dead transitions. [2024-06-27 21:09:22,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 548 transitions, 9854 flow [2024-06-27 21:09:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:09:22,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:09:22,341 INFO L175 Difference]: Start difference. First operand has 371 places, 501 transitions, 7530 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:09:22,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 548 transitions, 9854 flow [2024-06-27 21:09:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 548 transitions, 9444 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-27 21:09:25,589 INFO L231 Difference]: Finished difference. Result has 377 places, 511 transitions, 7791 flow [2024-06-27 21:09:25,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7124, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7791, PETRI_PLACES=377, PETRI_TRANSITIONS=511} [2024-06-27 21:09:25,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 21:09:25,590 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 511 transitions, 7791 flow [2024-06-27 21:09:25,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:25,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:25,590 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 21:09:25,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:09:25,591 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 21:09:25,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 682765263, now seen corresponding path program 4 times [2024-06-27 21:09:25,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392288686] [2024-06-27 21:09:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:26,301 INFO 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 21:09:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392288686] [2024-06-27 21:09:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392288686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:26,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:26,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904290958] [2024-06-27 21:09:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:26,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:26,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:26,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:26,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 511 transitions, 7791 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:26,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:26,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:26,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:28,331 INFO L124 PetriNetUnfolderBase]: 4766/7264 cut-off events. [2024-06-27 21:09:28,331 INFO L125 PetriNetUnfolderBase]: For 941522/941552 co-relation queries the response was YES. [2024-06-27 21:09:28,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67019 conditions, 7264 events. 4766/7264 cut-off events. For 941522/941552 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 41875 event pairs, 923 based on Foata normal form. 24/7282 useless extension candidates. Maximal degree in co-relation 66838. Up to 6925 conditions per place. [2024-06-27 21:09:28,431 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 457 selfloop transitions, 85 changer transitions 0/545 dead transitions. [2024-06-27 21:09:28,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 545 transitions, 9435 flow [2024-06-27 21:09:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:09:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:09:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 21:09:28,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 21:09:28,433 INFO L175 Difference]: Start difference. First operand has 377 places, 511 transitions, 7791 flow. Second operand 10 states and 155 transitions. [2024-06-27 21:09:28,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 545 transitions, 9435 flow [2024-06-27 21:09:32,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 545 transitions, 9056 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 21:09:32,136 INFO L231 Difference]: Finished difference. Result has 383 places, 519 transitions, 7826 flow [2024-06-27 21:09:32,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7826, PETRI_PLACES=383, PETRI_TRANSITIONS=519} [2024-06-27 21:09:32,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 21:09:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 519 transitions, 7826 flow [2024-06-27 21:09:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:32,137 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 21:09:32,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:09:32,137 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 21:09:32,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 682765139, now seen corresponding path program 3 times [2024-06-27 21:09:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330331768] [2024-06-27 21:09:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:32,898 INFO 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 21:09:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330331768] [2024-06-27 21:09:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330331768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125353592] [2024-06-27 21:09:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:32,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:32,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 519 transitions, 7826 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:34,850 INFO L124 PetriNetUnfolderBase]: 4774/7278 cut-off events. [2024-06-27 21:09:34,850 INFO L125 PetriNetUnfolderBase]: For 947604/947604 co-relation queries the response was YES. [2024-06-27 21:09:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67053 conditions, 7278 events. 4774/7278 cut-off events. For 947604/947604 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41999 event pairs, 1003 based on Foata normal form. 2/7278 useless extension candidates. Maximal degree in co-relation 66869. Up to 7226 conditions per place. [2024-06-27 21:09:34,950 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 510 selfloop transitions, 24 changer transitions 0/537 dead transitions. [2024-06-27 21:09:34,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 537 transitions, 8994 flow [2024-06-27 21:09:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 21:09:34,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3472222222222222 [2024-06-27 21:09:34,952 INFO L175 Difference]: Start difference. First operand has 383 places, 519 transitions, 7826 flow. Second operand 9 states and 125 transitions. [2024-06-27 21:09:34,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 537 transitions, 8994 flow [2024-06-27 21:09:38,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 537 transitions, 8776 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:38,929 INFO L231 Difference]: Finished difference. Result has 386 places, 521 transitions, 7721 flow [2024-06-27 21:09:38,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7608, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7721, PETRI_PLACES=386, PETRI_TRANSITIONS=521} [2024-06-27 21:09:38,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-27 21:09:38,929 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 521 transitions, 7721 flow [2024-06-27 21:09:38,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:38,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:38,930 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 21:09:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:09:38,930 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 21:09:38,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash 818898821, now seen corresponding path program 5 times [2024-06-27 21:09:38,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:38,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643676090] [2024-06-27 21:09:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:39,700 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 21:09:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643676090] [2024-06-27 21:09:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643676090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:39,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:39,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688051123] [2024-06-27 21:09:39,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:39,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:39,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:39,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 521 transitions, 7721 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:39,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:39,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:39,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:41,523 INFO L124 PetriNetUnfolderBase]: 4778/7282 cut-off events. [2024-06-27 21:09:41,523 INFO L125 PetriNetUnfolderBase]: For 962537/962567 co-relation queries the response was YES. [2024-06-27 21:09:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66749 conditions, 7282 events. 4778/7282 cut-off events. For 962537/962567 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42000 event pairs, 919 based on Foata normal form. 24/7300 useless extension candidates. Maximal degree in co-relation 66563. Up to 7004 conditions per place. [2024-06-27 21:09:41,657 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 463 selfloop transitions, 85 changer transitions 0/551 dead transitions. [2024-06-27 21:09:41,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 551 transitions, 9040 flow [2024-06-27 21:09:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:09:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:09:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-27 21:09:41,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-06-27 21:09:41,658 INFO L175 Difference]: Start difference. First operand has 386 places, 521 transitions, 7721 flow. Second operand 11 states and 166 transitions. [2024-06-27 21:09:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 551 transitions, 9040 flow [2024-06-27 21:09:45,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 551 transitions, 8947 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 21:09:45,248 INFO L231 Difference]: Finished difference. Result has 390 places, 525 transitions, 7908 flow [2024-06-27 21:09:45,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7908, PETRI_PLACES=390, PETRI_TRANSITIONS=525} [2024-06-27 21:09:45,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-27 21:09:45,249 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 525 transitions, 7908 flow [2024-06-27 21:09:45,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:45,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:45,249 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 21:09:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:09:45,249 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 21:09:45,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 818905765, now seen corresponding path program 1 times [2024-06-27 21:09:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118618737] [2024-06-27 21:09:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:46,027 INFO 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 21:09:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118618737] [2024-06-27 21:09:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118618737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:46,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:46,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590443807] [2024-06-27 21:09:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:46,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:46,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:46,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 525 transitions, 7908 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:46,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:46,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:46,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:47,762 INFO L124 PetriNetUnfolderBase]: 4794/7306 cut-off events. [2024-06-27 21:09:47,762 INFO L125 PetriNetUnfolderBase]: For 980730/980760 co-relation queries the response was YES. [2024-06-27 21:09:47,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67462 conditions, 7306 events. 4794/7306 cut-off events. For 980730/980760 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 42175 event pairs, 929 based on Foata normal form. 24/7324 useless extension candidates. Maximal degree in co-relation 67275. Up to 7101 conditions per place. [2024-06-27 21:09:47,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 485 selfloop transitions, 60 changer transitions 0/548 dead transitions. [2024-06-27 21:09:47,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 548 transitions, 9180 flow [2024-06-27 21:09:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:09:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:09:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 21:09:47,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 21:09:47,889 INFO L175 Difference]: Start difference. First operand has 390 places, 525 transitions, 7908 flow. Second operand 8 states and 125 transitions. [2024-06-27 21:09:47,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 548 transitions, 9180 flow [2024-06-27 21:09:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 548 transitions, 8943 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 21:09:51,993 INFO L231 Difference]: Finished difference. Result has 389 places, 528 transitions, 7901 flow [2024-06-27 21:09:51,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7671, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7901, PETRI_PLACES=389, PETRI_TRANSITIONS=528} [2024-06-27 21:09:51,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-27 21:09:51,993 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 528 transitions, 7901 flow [2024-06-27 21:09:51,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:51,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:51,994 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 21:09:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:09:51,994 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 21:09:51,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1893230063, now seen corresponding path program 6 times [2024-06-27 21:09:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406874061] [2024-06-27 21:09:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:52,661 INFO 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 21:09:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406874061] [2024-06-27 21:09:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406874061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30585171] [2024-06-27 21:09:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:52,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:52,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 528 transitions, 7901 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:52,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:52,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:52,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:09:54,501 INFO L124 PetriNetUnfolderBase]: 4834/7362 cut-off events. [2024-06-27 21:09:54,502 INFO L125 PetriNetUnfolderBase]: For 1014346/1014376 co-relation queries the response was YES. [2024-06-27 21:09:54,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68410 conditions, 7362 events. 4834/7362 cut-off events. For 1014346/1014376 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42528 event pairs, 962 based on Foata normal form. 24/7380 useless extension candidates. Maximal degree in co-relation 68222. Up to 6938 conditions per place. [2024-06-27 21:09:54,613 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 460 selfloop transitions, 103 changer transitions 0/566 dead transitions. [2024-06-27 21:09:54,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 566 transitions, 9629 flow [2024-06-27 21:09:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:09:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:09:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:09:54,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 21:09:54,615 INFO L175 Difference]: Start difference. First operand has 389 places, 528 transitions, 7901 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:09:54,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 566 transitions, 9629 flow [2024-06-27 21:09:58,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 566 transitions, 9419 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:09:58,923 INFO L231 Difference]: Finished difference. Result has 393 places, 536 transitions, 8180 flow [2024-06-27 21:09:58,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8180, PETRI_PLACES=393, PETRI_TRANSITIONS=536} [2024-06-27 21:09:58,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-27 21:09:58,923 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 536 transitions, 8180 flow [2024-06-27 21:09:58,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:58,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:09:58,924 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 21:09:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:09:58,924 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 21:09:58,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:09:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 416003459, now seen corresponding path program 2 times [2024-06-27 21:09:58,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:09:58,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830188836] [2024-06-27 21:09:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:09:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:09:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:09:59,770 INFO 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 21:09:59,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:09:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830188836] [2024-06-27 21:09:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830188836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:09:59,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:09:59,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:09:59,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126331335] [2024-06-27 21:09:59,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:09:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:09:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:09:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:09:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:09:59,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:09:59,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 536 transitions, 8180 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:09:59,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:09:59,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:09:59,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:01,641 INFO L124 PetriNetUnfolderBase]: 4850/7386 cut-off events. [2024-06-27 21:10:01,641 INFO L125 PetriNetUnfolderBase]: For 1036675/1036705 co-relation queries the response was YES. [2024-06-27 21:10:01,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69144 conditions, 7386 events. 4850/7386 cut-off events. For 1036675/1036705 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 42708 event pairs, 945 based on Foata normal form. 24/7404 useless extension candidates. Maximal degree in co-relation 68954. Up to 7276 conditions per place. [2024-06-27 21:10:01,755 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 511 selfloop transitions, 39 changer transitions 0/553 dead transitions. [2024-06-27 21:10:01,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 553 transitions, 9438 flow [2024-06-27 21:10:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 21:10:01,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-27 21:10:01,757 INFO L175 Difference]: Start difference. First operand has 393 places, 536 transitions, 8180 flow. Second operand 7 states and 107 transitions. [2024-06-27 21:10:01,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 553 transitions, 9438 flow [2024-06-27 21:10:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 553 transitions, 9205 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:06,023 INFO L231 Difference]: Finished difference. Result has 395 places, 539 transitions, 8144 flow [2024-06-27 21:10:06,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8144, PETRI_PLACES=395, PETRI_TRANSITIONS=539} [2024-06-27 21:10:06,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 21:10:06,023 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 539 transitions, 8144 flow [2024-06-27 21:10:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:06,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:06,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:06,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:10:06,024 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 21:10:06,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash 179643401, now seen corresponding path program 4 times [2024-06-27 21:10:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957455193] [2024-06-27 21:10:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:06,746 INFO 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 21:10:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957455193] [2024-06-27 21:10:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957455193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:06,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67290130] [2024-06-27 21:10:06,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:06,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:06,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:06,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:06,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:06,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 539 transitions, 8144 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:06,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:06,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:06,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:08,605 INFO L124 PetriNetUnfolderBase]: 4845/7381 cut-off events. [2024-06-27 21:10:08,605 INFO L125 PetriNetUnfolderBase]: For 1033903/1033903 co-relation queries the response was YES. [2024-06-27 21:10:08,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68905 conditions, 7381 events. 4845/7381 cut-off events. For 1033903/1033903 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42656 event pairs, 970 based on Foata normal form. 2/7381 useless extension candidates. Maximal degree in co-relation 68713. Up to 7296 conditions per place. [2024-06-27 21:10:08,709 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 531 selfloop transitions, 29 changer transitions 0/563 dead transitions. [2024-06-27 21:10:08,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 563 transitions, 9336 flow [2024-06-27 21:10:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:10:08,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:10:08,710 INFO L175 Difference]: Start difference. First operand has 395 places, 539 transitions, 8144 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:10:08,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 563 transitions, 9336 flow [2024-06-27 21:10:13,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 563 transitions, 9121 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:13,317 INFO L231 Difference]: Finished difference. Result has 398 places, 539 transitions, 7995 flow [2024-06-27 21:10:13,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7995, PETRI_PLACES=398, PETRI_TRANSITIONS=539} [2024-06-27 21:10:13,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-27 21:10:13,318 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 539 transitions, 7995 flow [2024-06-27 21:10:13,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:13,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:13,318 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 21:10:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:10:13,318 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 21:10:13,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1892156915, now seen corresponding path program 3 times [2024-06-27 21:10:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:13,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211538295] [2024-06-27 21:10:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:13,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:14,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:14,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211538295] [2024-06-27 21:10:14,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211538295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:14,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:14,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:14,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659591717] [2024-06-27 21:10:14,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:14,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:14,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:14,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:14,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 539 transitions, 7995 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:14,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:14,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:14,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:15,940 INFO L124 PetriNetUnfolderBase]: 4861/7403 cut-off events. [2024-06-27 21:10:15,940 INFO L125 PetriNetUnfolderBase]: For 1062894/1062924 co-relation queries the response was YES. [2024-06-27 21:10:16,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69069 conditions, 7403 events. 4861/7403 cut-off events. For 1062894/1062924 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 42756 event pairs, 924 based on Foata normal form. 24/7421 useless extension candidates. Maximal degree in co-relation 68876. Up to 7186 conditions per place. [2024-06-27 21:10:16,050 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 492 selfloop transitions, 65 changer transitions 0/560 dead transitions. [2024-06-27 21:10:16,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 560 transitions, 9293 flow [2024-06-27 21:10:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:10:16,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:10:16,052 INFO L175 Difference]: Start difference. First operand has 398 places, 539 transitions, 7995 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:10:16,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 560 transitions, 9293 flow [2024-06-27 21:10:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 560 transitions, 9220 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:10:20,518 INFO L231 Difference]: Finished difference. Result has 398 places, 542 transitions, 8180 flow [2024-06-27 21:10:20,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7922, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8180, PETRI_PLACES=398, PETRI_TRANSITIONS=542} [2024-06-27 21:10:20,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-27 21:10:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 542 transitions, 8180 flow [2024-06-27 21:10:20,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:20,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:20,519 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 21:10:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:10:20,520 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 21:10:20,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1892163859, now seen corresponding path program 7 times [2024-06-27 21:10:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:20,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164125724] [2024-06-27 21:10:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:10:21,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164125724] [2024-06-27 21:10:21,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164125724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:21,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:21,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:21,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150722896] [2024-06-27 21:10:21,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:21,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:21,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:21,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:21,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 542 transitions, 8180 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:21,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:21,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:21,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:23,166 INFO L124 PetriNetUnfolderBase]: 4881/7431 cut-off events. [2024-06-27 21:10:23,166 INFO L125 PetriNetUnfolderBase]: For 1087224/1087254 co-relation queries the response was YES. [2024-06-27 21:10:23,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69894 conditions, 7431 events. 4881/7431 cut-off events. For 1087224/1087254 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42935 event pairs, 971 based on Foata normal form. 24/7449 useless extension candidates. Maximal degree in co-relation 69700. Up to 7125 conditions per place. [2024-06-27 21:10:23,274 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 482 selfloop transitions, 81 changer transitions 0/566 dead transitions. [2024-06-27 21:10:23,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 566 transitions, 9513 flow [2024-06-27 21:10:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:10:23,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 21:10:23,276 INFO L175 Difference]: Start difference. First operand has 398 places, 542 transitions, 8180 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:10:23,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 566 transitions, 9513 flow [2024-06-27 21:10:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 566 transitions, 9281 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:28,036 INFO L231 Difference]: Finished difference. Result has 401 places, 546 transitions, 8240 flow [2024-06-27 21:10:28,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7950, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8240, PETRI_PLACES=401, PETRI_TRANSITIONS=546} [2024-06-27 21:10:28,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 21:10:28,037 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 546 transitions, 8240 flow [2024-06-27 21:10:28,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:28,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:28,037 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 21:10:28,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:10:28,038 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 21:10:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 407722305, now seen corresponding path program 8 times [2024-06-27 21:10:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030500447] [2024-06-27 21:10:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:28,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:28,661 INFO 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 21:10:28,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:28,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030500447] [2024-06-27 21:10:28,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030500447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:28,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:28,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:28,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386449800] [2024-06-27 21:10:28,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:28,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:28,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 546 transitions, 8240 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:28,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:28,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:28,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:30,709 INFO L124 PetriNetUnfolderBase]: 4991/7589 cut-off events. [2024-06-27 21:10:30,709 INFO L125 PetriNetUnfolderBase]: For 1146734/1146752 co-relation queries the response was YES. [2024-06-27 21:10:30,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71771 conditions, 7589 events. 4991/7589 cut-off events. For 1146734/1146752 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43899 event pairs, 1000 based on Foata normal form. 16/7591 useless extension candidates. Maximal degree in co-relation 71576. Up to 7141 conditions per place. [2024-06-27 21:10:30,815 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 493 selfloop transitions, 89 changer transitions 0/585 dead transitions. [2024-06-27 21:10:30,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 585 transitions, 10360 flow [2024-06-27 21:10:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:10:30,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 21:10:30,816 INFO L175 Difference]: Start difference. First operand has 401 places, 546 transitions, 8240 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:10:30,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 585 transitions, 10360 flow [2024-06-27 21:10:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 585 transitions, 10113 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 21:10:35,584 INFO L231 Difference]: Finished difference. Result has 405 places, 561 transitions, 8633 flow [2024-06-27 21:10:35,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8633, PETRI_PLACES=405, PETRI_TRANSITIONS=561} [2024-06-27 21:10:35,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-27 21:10:35,585 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 561 transitions, 8633 flow [2024-06-27 21:10:35,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:35,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:35,585 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 21:10:35,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:10:35,586 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 21:10:35,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1885661795, now seen corresponding path program 4 times [2024-06-27 21:10:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522031337] [2024-06-27 21:10:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:35,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:36,367 INFO 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 21:10:36,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522031337] [2024-06-27 21:10:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522031337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:36,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:36,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008010785] [2024-06-27 21:10:36,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:36,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:36,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:36,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 561 transitions, 8633 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:36,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:36,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:36,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:38,391 INFO L124 PetriNetUnfolderBase]: 4994/7590 cut-off events. [2024-06-27 21:10:38,391 INFO L125 PetriNetUnfolderBase]: For 1129203/1129233 co-relation queries the response was YES. [2024-06-27 21:10:38,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72032 conditions, 7590 events. 4994/7590 cut-off events. For 1129203/1129233 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43850 event pairs, 1012 based on Foata normal form. 24/7608 useless extension candidates. Maximal degree in co-relation 71834. Up to 7486 conditions per place. [2024-06-27 21:10:38,509 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 541 selfloop transitions, 34 changer transitions 0/578 dead transitions. [2024-06-27 21:10:38,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 578 transitions, 9943 flow [2024-06-27 21:10:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-27 21:10:38,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 21:10:38,510 INFO L175 Difference]: Start difference. First operand has 405 places, 561 transitions, 8633 flow. Second operand 7 states and 106 transitions. [2024-06-27 21:10:38,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 578 transitions, 9943 flow [2024-06-27 21:10:41,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 578 transitions, 9628 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-27 21:10:41,744 INFO L231 Difference]: Finished difference. Result has 408 places, 564 transitions, 8514 flow [2024-06-27 21:10:41,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8320, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8514, PETRI_PLACES=408, PETRI_TRANSITIONS=564} [2024-06-27 21:10:41,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-27 21:10:41,744 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 564 transitions, 8514 flow [2024-06-27 21:10:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:41,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:41,745 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 21:10:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:10:41,745 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 21:10:41,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash 407959641, now seen corresponding path program 1 times [2024-06-27 21:10:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440707099] [2024-06-27 21:10:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:41,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:42,532 INFO 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 21:10:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440707099] [2024-06-27 21:10:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440707099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:42,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025755793] [2024-06-27 21:10:42,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:42,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:42,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 564 transitions, 8514 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:42,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:42,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:44,533 INFO L124 PetriNetUnfolderBase]: 4984/7576 cut-off events. [2024-06-27 21:10:44,533 INFO L125 PetriNetUnfolderBase]: For 1120909/1120939 co-relation queries the response was YES. [2024-06-27 21:10:44,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71215 conditions, 7576 events. 4984/7576 cut-off events. For 1120909/1120939 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43828 event pairs, 969 based on Foata normal form. 22/7592 useless extension candidates. Maximal degree in co-relation 71016. Up to 7460 conditions per place. [2024-06-27 21:10:44,654 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 534 selfloop transitions, 44 changer transitions 0/581 dead transitions. [2024-06-27 21:10:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 581 transitions, 9811 flow [2024-06-27 21:10:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:10:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:10:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 21:10:44,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 21:10:44,656 INFO L175 Difference]: Start difference. First operand has 408 places, 564 transitions, 8514 flow. Second operand 7 states and 108 transitions. [2024-06-27 21:10:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 581 transitions, 9811 flow [2024-06-27 21:10:49,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 581 transitions, 9637 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:49,598 INFO L231 Difference]: Finished difference. Result has 410 places, 567 transitions, 8527 flow [2024-06-27 21:10:49,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8527, PETRI_PLACES=410, PETRI_TRANSITIONS=567} [2024-06-27 21:10:49,599 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 21:10:49,599 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 567 transitions, 8527 flow [2024-06-27 21:10:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:10:49,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:49,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:10:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:10:49,600 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 21:10:49,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1547994535, now seen corresponding path program 1 times [2024-06-27 21:10:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853885155] [2024-06-27 21:10:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:50,346 INFO 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 21:10:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:50,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853885155] [2024-06-27 21:10:50,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853885155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:50,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425430476] [2024-06-27 21:10:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:50,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:50,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 567 transitions, 8527 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:10:50,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:50,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:50,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:10:52,457 INFO L124 PetriNetUnfolderBase]: 5074/7714 cut-off events. [2024-06-27 21:10:52,457 INFO L125 PetriNetUnfolderBase]: For 1219341/1219371 co-relation queries the response was YES. [2024-06-27 21:10:52,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 7714 events. 5074/7714 cut-off events. For 1219341/1219371 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44545 event pairs, 874 based on Foata normal form. 28/7736 useless extension candidates. Maximal degree in co-relation 72641. Up to 7139 conditions per place. [2024-06-27 21:10:52,581 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 536 selfloop transitions, 69 changer transitions 0/608 dead transitions. [2024-06-27 21:10:52,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 608 transitions, 10215 flow [2024-06-27 21:10:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:10:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:10:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:10:52,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 21:10:52,582 INFO L175 Difference]: Start difference. First operand has 410 places, 567 transitions, 8527 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:10:52,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 608 transitions, 10215 flow [2024-06-27 21:10:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 608 transitions, 10051 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 21:10:58,403 INFO L231 Difference]: Finished difference. Result has 414 places, 573 transitions, 8595 flow [2024-06-27 21:10:58,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8363, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8595, PETRI_PLACES=414, PETRI_TRANSITIONS=573} [2024-06-27 21:10:58,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-27 21:10:58,405 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 573 transitions, 8595 flow [2024-06-27 21:10:58,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:10:58,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:10:58,405 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 21:10:58,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:10:58,405 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 21:10:58,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:10:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1555403845, now seen corresponding path program 2 times [2024-06-27 21:10:58,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:10:58,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066423743] [2024-06-27 21:10:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:10:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:10:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:10:59,146 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 21:10:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:10:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066423743] [2024-06-27 21:10:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066423743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:10:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:10:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:10:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379705880] [2024-06-27 21:10:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:10:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:10:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:10:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:10:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:10:59,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:10:59,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 573 transitions, 8595 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:10:59,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:10:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:10:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:01,355 INFO L124 PetriNetUnfolderBase]: 5190/7890 cut-off events. [2024-06-27 21:11:01,355 INFO L125 PetriNetUnfolderBase]: For 1310959/1310989 co-relation queries the response was YES. [2024-06-27 21:11:01,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75580 conditions, 7890 events. 5190/7890 cut-off events. For 1310959/1310989 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45979 event pairs, 1038 based on Foata normal form. 28/7912 useless extension candidates. Maximal degree in co-relation 75378. Up to 7499 conditions per place. [2024-06-27 21:11:01,488 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 545 selfloop transitions, 65 changer transitions 0/613 dead transitions. [2024-06-27 21:11:01,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 613 transitions, 10318 flow [2024-06-27 21:11:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:11:01,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 21:11:01,489 INFO L175 Difference]: Start difference. First operand has 414 places, 573 transitions, 8595 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:11:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 613 transitions, 10318 flow [2024-06-27 21:11:06,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 613 transitions, 10226 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:11:06,809 INFO L231 Difference]: Finished difference. Result has 420 places, 579 transitions, 8748 flow [2024-06-27 21:11:06,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8748, PETRI_PLACES=420, PETRI_TRANSITIONS=579} [2024-06-27 21:11:06,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 21:11:06,810 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 579 transitions, 8748 flow [2024-06-27 21:11:06,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:11:06,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:06,810 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 21:11:06,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:11:06,810 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 21:11:06,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:06,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2000773573, now seen corresponding path program 3 times [2024-06-27 21:11:06,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:06,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858066632] [2024-06-27 21:11:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:07,609 INFO 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 21:11:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858066632] [2024-06-27 21:11:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858066632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:07,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:07,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784748995] [2024-06-27 21:11:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:07,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:07,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 579 transitions, 8748 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:11:07,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:07,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:07,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:09,746 INFO L124 PetriNetUnfolderBase]: 5162/7850 cut-off events. [2024-06-27 21:11:09,747 INFO L125 PetriNetUnfolderBase]: For 1286959/1286989 co-relation queries the response was YES. [2024-06-27 21:11:09,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74533 conditions, 7850 events. 5162/7850 cut-off events. For 1286959/1286989 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 45705 event pairs, 1036 based on Foata normal form. 32/7876 useless extension candidates. Maximal degree in co-relation 74328. Up to 7537 conditions per place. [2024-06-27 21:11:09,889 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 66 changer transitions 0/608 dead transitions. [2024-06-27 21:11:09,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 608 transitions, 10119 flow [2024-06-27 21:11:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:11:09,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 21:11:09,890 INFO L175 Difference]: Start difference. First operand has 420 places, 579 transitions, 8748 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:11:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 608 transitions, 10119 flow [2024-06-27 21:11:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 608 transitions, 10023 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:15,348 INFO L231 Difference]: Finished difference. Result has 424 places, 579 transitions, 8789 flow [2024-06-27 21:11:15,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8652, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8789, PETRI_PLACES=424, PETRI_TRANSITIONS=579} [2024-06-27 21:11:15,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-27 21:11:15,349 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 579 transitions, 8789 flow [2024-06-27 21:11:15,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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 21:11:15,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:15,349 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 21:11:15,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:11:15,349 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 21:11:15,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1636532395, now seen corresponding path program 1 times [2024-06-27 21:11:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485380207] [2024-06-27 21:11:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:15,894 INFO 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 21:11:15,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:15,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485380207] [2024-06-27 21:11:15,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485380207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:15,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:15,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676054819] [2024-06-27 21:11:15,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:15,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:15,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 579 transitions, 8789 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:11:15,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:15,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:15,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:17,991 INFO L124 PetriNetUnfolderBase]: 5236/7951 cut-off events. [2024-06-27 21:11:17,991 INFO L125 PetriNetUnfolderBase]: For 1300399/1300405 co-relation queries the response was YES. [2024-06-27 21:11:18,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76903 conditions, 7951 events. 5236/7951 cut-off events. For 1300399/1300405 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46310 event pairs, 1008 based on Foata normal form. 8/7957 useless extension candidates. Maximal degree in co-relation 76696. Up to 7544 conditions per place. [2024-06-27 21:11:18,130 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 529 selfloop transitions, 97 changer transitions 0/629 dead transitions. [2024-06-27 21:11:18,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 629 transitions, 10728 flow [2024-06-27 21:11:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:11:18,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:11:18,131 INFO L175 Difference]: Start difference. First operand has 424 places, 579 transitions, 8789 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:11:18,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 629 transitions, 10728 flow [2024-06-27 21:11:22,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 629 transitions, 10597 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:22,935 INFO L231 Difference]: Finished difference. Result has 428 places, 589 transitions, 9192 flow [2024-06-27 21:11:22,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9192, PETRI_PLACES=428, PETRI_TRANSITIONS=589} [2024-06-27 21:11:22,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 21:11:22,936 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 589 transitions, 9192 flow [2024-06-27 21:11:22,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:11:22,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:22,936 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 21:11:22,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:11:22,937 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 21:11:22,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash -487922617, now seen corresponding path program 1 times [2024-06-27 21:11:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328857061] [2024-06-27 21:11:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:22,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:23,516 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 21:11:23,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328857061] [2024-06-27 21:11:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328857061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406477395] [2024-06-27 21:11:23,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:23,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:23,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 589 transitions, 9192 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:23,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:23,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:23,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:25,620 INFO L124 PetriNetUnfolderBase]: 5325/8078 cut-off events. [2024-06-27 21:11:25,621 INFO L125 PetriNetUnfolderBase]: For 1388622/1388658 co-relation queries the response was YES. [2024-06-27 21:11:25,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79399 conditions, 8078 events. 5325/8078 cut-off events. For 1388622/1388658 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 47119 event pairs, 1009 based on Foata normal form. 28/8095 useless extension candidates. Maximal degree in co-relation 79190. Up to 7677 conditions per place. [2024-06-27 21:11:25,772 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 546 selfloop transitions, 84 changer transitions 0/633 dead transitions. [2024-06-27 21:11:25,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 633 transitions, 11036 flow [2024-06-27 21:11:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:11:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 21:11:25,773 INFO L175 Difference]: Start difference. First operand has 428 places, 589 transitions, 9192 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:11:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 633 transitions, 11036 flow [2024-06-27 21:11:32,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 633 transitions, 10747 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:32,717 INFO L231 Difference]: Finished difference. Result has 432 places, 604 transitions, 9382 flow [2024-06-27 21:11:32,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8911, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9382, PETRI_PLACES=432, PETRI_TRANSITIONS=604} [2024-06-27 21:11:32,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-27 21:11:32,718 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 604 transitions, 9382 flow [2024-06-27 21:11:32,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:32,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:32,718 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 21:11:32,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:11:32,719 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 21:11:32,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2082012793, now seen corresponding path program 2 times [2024-06-27 21:11:32,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:32,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901755101] [2024-06-27 21:11:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:32,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:33,277 INFO 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 21:11:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901755101] [2024-06-27 21:11:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901755101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:33,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:33,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480323498] [2024-06-27 21:11:33,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:33,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:33,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:33,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 604 transitions, 9382 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:11:33,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:33,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:35,522 INFO L124 PetriNetUnfolderBase]: 5319/8066 cut-off events. [2024-06-27 21:11:35,522 INFO L125 PetriNetUnfolderBase]: For 1389677/1389683 co-relation queries the response was YES. [2024-06-27 21:11:35,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80065 conditions, 8066 events. 5319/8066 cut-off events. For 1389677/1389683 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 47013 event pairs, 1019 based on Foata normal form. 8/8072 useless extension candidates. Maximal degree in co-relation 79853. Up to 7729 conditions per place. [2024-06-27 21:11:35,671 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 544 selfloop transitions, 92 changer transitions 0/639 dead transitions. [2024-06-27 21:11:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 639 transitions, 10816 flow [2024-06-27 21:11:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:11:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:11:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:11:35,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:11:35,672 INFO L175 Difference]: Start difference. First operand has 432 places, 604 transitions, 9382 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:11:35,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 639 transitions, 10816 flow [2024-06-27 21:11:41,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 639 transitions, 10740 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-27 21:11:41,646 INFO L231 Difference]: Finished difference. Result has 440 places, 604 transitions, 9512 flow [2024-06-27 21:11:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9322, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9512, PETRI_PLACES=440, PETRI_TRANSITIONS=604} [2024-06-27 21:11:41,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 399 predicate places. [2024-06-27 21:11:41,647 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 604 transitions, 9512 flow [2024-06-27 21:11:41,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:11:41,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:41,648 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 21:11:41,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:11:41,648 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 21:11:41,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1037924273, now seen corresponding path program 2 times [2024-06-27 21:11:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:41,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155583302] [2024-06-27 21:11:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:42,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155583302] [2024-06-27 21:11:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155583302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325229877] [2024-06-27 21:11:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:42,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:42,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:42,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 604 transitions, 9512 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:42,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:42,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:44,192 INFO L124 PetriNetUnfolderBase]: 5339/8098 cut-off events. [2024-06-27 21:11:44,192 INFO L125 PetriNetUnfolderBase]: For 1426764/1426800 co-relation queries the response was YES. [2024-06-27 21:11:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79949 conditions, 8098 events. 5339/8098 cut-off events. For 1426764/1426800 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47240 event pairs, 1076 based on Foata normal form. 28/8115 useless extension candidates. Maximal degree in co-relation 79734. Up to 7817 conditions per place. [2024-06-27 21:11:44,338 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 553 selfloop transitions, 76 changer transitions 0/632 dead transitions. [2024-06-27 21:11:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 632 transitions, 10943 flow [2024-06-27 21:11:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:11:44,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 21:11:44,339 INFO L175 Difference]: Start difference. First operand has 440 places, 604 transitions, 9512 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:11:44,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 632 transitions, 10943 flow [2024-06-27 21:11:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 632 transitions, 10717 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:11:50,221 INFO L231 Difference]: Finished difference. Result has 442 places, 610 transitions, 9533 flow [2024-06-27 21:11:50,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9287, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9533, PETRI_PLACES=442, PETRI_TRANSITIONS=610} [2024-06-27 21:11:50,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 401 predicate places. [2024-06-27 21:11:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 610 transitions, 9533 flow [2024-06-27 21:11:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:50,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:50,222 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 21:11:50,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:11:50,223 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 21:11:50,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:50,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2035822797, now seen corresponding path program 3 times [2024-06-27 21:11:50,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:50,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322455248] [2024-06-27 21:11:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:50,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:11:50,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322455248] [2024-06-27 21:11:50,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322455248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:50,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:50,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:11:50,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87939026] [2024-06-27 21:11:50,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:50,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:11:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:11:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:11:50,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:50,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 610 transitions, 9533 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:50,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:50,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:50,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:11:52,933 INFO L124 PetriNetUnfolderBase]: 5369/8140 cut-off events. [2024-06-27 21:11:52,933 INFO L125 PetriNetUnfolderBase]: For 1452270/1452306 co-relation queries the response was YES. [2024-06-27 21:11:53,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80438 conditions, 8140 events. 5369/8140 cut-off events. For 1452270/1452306 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 47473 event pairs, 1080 based on Foata normal form. 28/8157 useless extension candidates. Maximal degree in co-relation 80222. Up to 7833 conditions per place. [2024-06-27 21:11:53,083 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 558 selfloop transitions, 79 changer transitions 0/640 dead transitions. [2024-06-27 21:11:53,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 640 transitions, 11031 flow [2024-06-27 21:11:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:11:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:11:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:11:53,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 21:11:53,085 INFO L175 Difference]: Start difference. First operand has 442 places, 610 transitions, 9533 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:11:53,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 640 transitions, 11031 flow [2024-06-27 21:11:58,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 640 transitions, 10863 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:11:58,606 INFO L231 Difference]: Finished difference. Result has 447 places, 616 transitions, 9669 flow [2024-06-27 21:11:58,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9365, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9669, PETRI_PLACES=447, PETRI_TRANSITIONS=616} [2024-06-27 21:11:58,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-27 21:11:58,606 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 616 transitions, 9669 flow [2024-06-27 21:11:58,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:11:58,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:11:58,607 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 21:11:58,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:11:58,607 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 21:11:58,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:11:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2035822983, now seen corresponding path program 3 times [2024-06-27 21:11:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:11:58,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710449581] [2024-06-27 21:11:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:11:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:11:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:11:59,210 INFO 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 21:11:59,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:11:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710449581] [2024-06-27 21:11:59,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710449581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:11:59,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:11:59,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:11:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191350078] [2024-06-27 21:11:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:11:59,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:11:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:11:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:11:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:11:59,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:11:59,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 616 transitions, 9669 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:11:59,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:11:59,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:11:59,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:01,412 INFO L124 PetriNetUnfolderBase]: 5379/8150 cut-off events. [2024-06-27 21:12:01,413 INFO L125 PetriNetUnfolderBase]: For 1462369/1462375 co-relation queries the response was YES. [2024-06-27 21:12:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80887 conditions, 8150 events. 5379/8150 cut-off events. For 1462369/1462375 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47541 event pairs, 1065 based on Foata normal form. 8/8156 useless extension candidates. Maximal degree in co-relation 80669. Up to 7869 conditions per place. [2024-06-27 21:12:01,560 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 559 selfloop transitions, 87 changer transitions 0/649 dead transitions. [2024-06-27 21:12:01,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 649 transitions, 11166 flow [2024-06-27 21:12:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:12:01,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-27 21:12:01,561 INFO L175 Difference]: Start difference. First operand has 447 places, 616 transitions, 9669 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:12:01,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 649 transitions, 11166 flow [2024-06-27 21:12:07,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 649 transitions, 10990 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:07,329 INFO L231 Difference]: Finished difference. Result has 451 places, 619 transitions, 9764 flow [2024-06-27 21:12:07,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9493, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9764, PETRI_PLACES=451, PETRI_TRANSITIONS=619} [2024-06-27 21:12:07,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-27 21:12:07,330 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 619 transitions, 9764 flow [2024-06-27 21:12:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:07,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:07,338 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 21:12:07,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:12:07,338 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 21:12:07,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1208983799, now seen corresponding path program 4 times [2024-06-27 21:12:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:07,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720450136] [2024-06-27 21:12:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:07,926 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 21:12:07,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720450136] [2024-06-27 21:12:07,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720450136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:07,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:07,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:07,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829951693] [2024-06-27 21:12:07,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:07,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:07,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:12:07,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 619 transitions, 9764 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:07,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:07,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:12:07,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:10,210 INFO L124 PetriNetUnfolderBase]: 5669/8550 cut-off events. [2024-06-27 21:12:10,211 INFO L125 PetriNetUnfolderBase]: For 1727068/1727070 co-relation queries the response was YES. [2024-06-27 21:12:10,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89737 conditions, 8550 events. 5669/8550 cut-off events. For 1727068/1727070 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49922 event pairs, 1013 based on Foata normal form. 4/8552 useless extension candidates. Maximal degree in co-relation 89518. Up to 7427 conditions per place. [2024-06-27 21:12:10,372 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 511 selfloop transitions, 189 changer transitions 0/703 dead transitions. [2024-06-27 21:12:10,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 703 transitions, 13284 flow [2024-06-27 21:12:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:10,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:12:10,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-27 21:12:10,373 INFO L175 Difference]: Start difference. First operand has 451 places, 619 transitions, 9764 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:12:10,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 703 transitions, 13284 flow [2024-06-27 21:12:17,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 703 transitions, 13022 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 21:12:17,548 INFO L231 Difference]: Finished difference. Result has 455 places, 661 transitions, 11300 flow [2024-06-27 21:12:17,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9502, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11300, PETRI_PLACES=455, PETRI_TRANSITIONS=661} [2024-06-27 21:12:17,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-27 21:12:17,548 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 661 transitions, 11300 flow [2024-06-27 21:12:17,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:17,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:17,549 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 21:12:17,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:12:17,549 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 21:12:17,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash -358969223, now seen corresponding path program 4 times [2024-06-27 21:12:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949765422] [2024-06-27 21:12:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949765422] [2024-06-27 21:12:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949765422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:18,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:12:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93552069] [2024-06-27 21:12:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:12:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:12:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:12:18,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:12:18,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 661 transitions, 11300 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:18,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:18,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:12:18,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:20,340 INFO L124 PetriNetUnfolderBase]: 5749/8665 cut-off events. [2024-06-27 21:12:20,341 INFO L125 PetriNetUnfolderBase]: For 1815730/1815748 co-relation queries the response was YES. [2024-06-27 21:12:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93523 conditions, 8665 events. 5749/8665 cut-off events. For 1815730/1815748 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50615 event pairs, 936 based on Foata normal form. 10/8661 useless extension candidates. Maximal degree in co-relation 93300. Up to 7796 conditions per place. [2024-06-27 21:12:20,510 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 542 selfloop transitions, 159 changer transitions 0/704 dead transitions. [2024-06-27 21:12:20,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 704 transitions, 13543 flow [2024-06-27 21:12:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:12:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:12:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:12:20,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:12:20,512 INFO L175 Difference]: Start difference. First operand has 455 places, 661 transitions, 11300 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:12:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 704 transitions, 13543 flow [2024-06-27 21:12:29,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 704 transitions, 13223 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:29,244 INFO L231 Difference]: Finished difference. Result has 461 places, 676 transitions, 11570 flow [2024-06-27 21:12:29,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11570, PETRI_PLACES=461, PETRI_TRANSITIONS=676} [2024-06-27 21:12:29,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 420 predicate places. [2024-06-27 21:12:29,244 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 676 transitions, 11570 flow [2024-06-27 21:12:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:12:29,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:29,245 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 21:12:29,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:12:29,245 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 21:12:29,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1572721409, now seen corresponding path program 5 times [2024-06-27 21:12:29,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:29,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891912223] [2024-06-27 21:12:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:29,793 INFO 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 21:12:29,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:29,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891912223] [2024-06-27 21:12:29,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891912223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:29,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:29,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:29,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261036027] [2024-06-27 21:12:29,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:29,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:29,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:12:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 676 transitions, 11570 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:12:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:32,793 INFO L124 PetriNetUnfolderBase]: 5759/8675 cut-off events. [2024-06-27 21:12:32,793 INFO L125 PetriNetUnfolderBase]: For 1829688/1829690 co-relation queries the response was YES. [2024-06-27 21:12:32,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93953 conditions, 8675 events. 5759/8675 cut-off events. For 1829688/1829690 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 50603 event pairs, 1039 based on Foata normal form. 4/8677 useless extension candidates. Maximal degree in co-relation 93727. Up to 8192 conditions per place. [2024-06-27 21:12:32,942 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 588 selfloop transitions, 122 changer transitions 0/713 dead transitions. [2024-06-27 21:12:32,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 713 transitions, 13460 flow [2024-06-27 21:12:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:12:32,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 21:12:32,943 INFO L175 Difference]: Start difference. First operand has 461 places, 676 transitions, 11570 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:12:32,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 713 transitions, 13460 flow [2024-06-27 21:12:40,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 713 transitions, 13226 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:12:40,584 INFO L231 Difference]: Finished difference. Result has 467 places, 679 transitions, 11682 flow [2024-06-27 21:12:40,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11336, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11682, PETRI_PLACES=467, PETRI_TRANSITIONS=679} [2024-06-27 21:12:40,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-27 21:12:40,585 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 679 transitions, 11682 flow [2024-06-27 21:12:40,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:40,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:40,586 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 21:12:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:12:40,586 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 21:12:40,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash -11999049, now seen corresponding path program 6 times [2024-06-27 21:12:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:40,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876152287] [2024-06-27 21:12:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:12:41,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:41,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876152287] [2024-06-27 21:12:41,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876152287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:41,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:41,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:41,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569892741] [2024-06-27 21:12:41,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:41,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:41,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:41,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:41,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:12:41,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 679 transitions, 11682 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:41,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:41,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:12:41,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:44,071 INFO L124 PetriNetUnfolderBase]: 5779/8703 cut-off events. [2024-06-27 21:12:44,072 INFO L125 PetriNetUnfolderBase]: For 1873013/1873015 co-relation queries the response was YES. [2024-06-27 21:12:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94247 conditions, 8703 events. 5779/8703 cut-off events. For 1873013/1873015 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 50856 event pairs, 966 based on Foata normal form. 6/8707 useless extension candidates. Maximal degree in co-relation 94020. Up to 7552 conditions per place. [2024-06-27 21:12:44,246 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 520 selfloop transitions, 204 changer transitions 0/727 dead transitions. [2024-06-27 21:12:44,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 727 transitions, 14245 flow [2024-06-27 21:12:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:12:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:12:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:12:44,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-27 21:12:44,247 INFO L175 Difference]: Start difference. First operand has 467 places, 679 transitions, 11682 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:12:44,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 727 transitions, 14245 flow [2024-06-27 21:12:51,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 727 transitions, 13999 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 21:12:51,361 INFO L231 Difference]: Finished difference. Result has 471 places, 685 transitions, 12009 flow [2024-06-27 21:12:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11436, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12009, PETRI_PLACES=471, PETRI_TRANSITIONS=685} [2024-06-27 21:12:51,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-27 21:12:51,362 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 685 transitions, 12009 flow [2024-06-27 21:12:51,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:51,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:12:51,362 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 21:12:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:12:51,363 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 21:12:51,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:12:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1203412882, now seen corresponding path program 1 times [2024-06-27 21:12:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:12:51,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188312777] [2024-06-27 21:12:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:12:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:12:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:12:52,075 INFO 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 21:12:52,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:12:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188312777] [2024-06-27 21:12:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188312777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:12:52,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:12:52,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:12:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296747765] [2024-06-27 21:12:52,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:12:52,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:12:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:12:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:12:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:12:52,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:12:52,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 685 transitions, 12009 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:12:52,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:12:52,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:12:52,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:12:55,194 INFO L124 PetriNetUnfolderBase]: 5773/8693 cut-off events. [2024-06-27 21:12:55,194 INFO L125 PetriNetUnfolderBase]: For 1874184/1874188 co-relation queries the response was YES. [2024-06-27 21:12:55,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94624 conditions, 8693 events. 5773/8693 cut-off events. For 1874184/1874188 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 50779 event pairs, 1102 based on Foata normal form. 6/8697 useless extension candidates. Maximal degree in co-relation 94396. Up to 8534 conditions per place. [2024-06-27 21:12:55,345 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 651 selfloop transitions, 68 changer transitions 0/722 dead transitions. [2024-06-27 21:12:55,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 722 transitions, 13911 flow [2024-06-27 21:12:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:12:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:12:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:12:55,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025 [2024-06-27 21:12:55,347 INFO L175 Difference]: Start difference. First operand has 471 places, 685 transitions, 12009 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:12:55,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 722 transitions, 13911 flow [2024-06-27 21:13:03,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 722 transitions, 13451 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 21:13:03,534 INFO L231 Difference]: Finished difference. Result has 475 places, 689 transitions, 11805 flow [2024-06-27 21:13:03,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11553, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11805, PETRI_PLACES=475, PETRI_TRANSITIONS=689} [2024-06-27 21:13:03,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 21:13:03,535 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 689 transitions, 11805 flow [2024-06-27 21:13:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:03,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:03,536 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 21:13:03,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:13:03,536 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 21:13:03,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -353428469, now seen corresponding path program 7 times [2024-06-27 21:13:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317204656] [2024-06-27 21:13:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:04,082 INFO 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 21:13:04,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317204656] [2024-06-27 21:13:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317204656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:04,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:04,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:04,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125236229] [2024-06-27 21:13:04,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:04,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:04,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:13:04,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 689 transitions, 11805 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:04,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:04,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:13:04,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:07,109 INFO L124 PetriNetUnfolderBase]: 5777/8701 cut-off events. [2024-06-27 21:13:07,110 INFO L125 PetriNetUnfolderBase]: For 1902974/1902976 co-relation queries the response was YES. [2024-06-27 21:13:07,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93886 conditions, 8701 events. 5777/8701 cut-off events. For 1902974/1902976 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 50897 event pairs, 982 based on Foata normal form. 6/8705 useless extension candidates. Maximal degree in co-relation 93657. Up to 7555 conditions per place. [2024-06-27 21:13:07,285 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 521 selfloop transitions, 206 changer transitions 0/730 dead transitions. [2024-06-27 21:13:07,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 730 transitions, 14276 flow [2024-06-27 21:13:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:13:07,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:13:07,287 INFO L175 Difference]: Start difference. First operand has 475 places, 689 transitions, 11805 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:13:07,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 730 transitions, 14276 flow [2024-06-27 21:13:16,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 730 transitions, 14070 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 21:13:16,213 INFO L231 Difference]: Finished difference. Result has 477 places, 692 transitions, 12087 flow [2024-06-27 21:13:16,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11599, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12087, PETRI_PLACES=477, PETRI_TRANSITIONS=692} [2024-06-27 21:13:16,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-27 21:13:16,214 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 692 transitions, 12087 flow [2024-06-27 21:13:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:16,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:16,214 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 21:13:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:13:16,214 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 21:13:16,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 95645449, now seen corresponding path program 8 times [2024-06-27 21:13:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:16,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686030922] [2024-06-27 21:13:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:16,784 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 21:13:16,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686030922] [2024-06-27 21:13:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686030922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:16,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:16,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321088284] [2024-06-27 21:13:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:16,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:16,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:13:16,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 692 transitions, 12087 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:16,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:16,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:13:16,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:19,748 INFO L124 PetriNetUnfolderBase]: 5803/8737 cut-off events. [2024-06-27 21:13:19,748 INFO L125 PetriNetUnfolderBase]: For 1937430/1937432 co-relation queries the response was YES. [2024-06-27 21:13:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95424 conditions, 8737 events. 5803/8737 cut-off events. For 1937430/1937432 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50993 event pairs, 999 based on Foata normal form. 4/8739 useless extension candidates. Maximal degree in co-relation 95194. Up to 8180 conditions per place. [2024-06-27 21:13:20,067 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 593 selfloop transitions, 139 changer transitions 0/735 dead transitions. [2024-06-27 21:13:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 735 transitions, 14649 flow [2024-06-27 21:13:20,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:13:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:13:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:13:20,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068181818181818 [2024-06-27 21:13:20,069 INFO L175 Difference]: Start difference. First operand has 477 places, 692 transitions, 12087 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:13:20,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 735 transitions, 14649 flow [2024-06-27 21:13:28,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 735 transitions, 14242 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:28,542 INFO L231 Difference]: Finished difference. Result has 485 places, 698 transitions, 12179 flow [2024-06-27 21:13:28,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11694, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12179, PETRI_PLACES=485, PETRI_TRANSITIONS=698} [2024-06-27 21:13:28,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 444 predicate places. [2024-06-27 21:13:28,548 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 698 transitions, 12179 flow [2024-06-27 21:13:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:28,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:28,548 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 21:13:28,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:13:28,548 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 21:13:28,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash -349709399, now seen corresponding path program 9 times [2024-06-27 21:13:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:28,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853291405] [2024-06-27 21:13:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:29,129 INFO 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 21:13:29,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:29,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853291405] [2024-06-27 21:13:29,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853291405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:29,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649960261] [2024-06-27 21:13:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:29,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:13:29,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 698 transitions, 12179 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:29,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:29,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:13:29,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:32,170 INFO L124 PetriNetUnfolderBase]: 5795/8727 cut-off events. [2024-06-27 21:13:32,170 INFO L125 PetriNetUnfolderBase]: For 1951299/1951301 co-relation queries the response was YES. [2024-06-27 21:13:32,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94754 conditions, 8727 events. 5795/8727 cut-off events. For 1951299/1951301 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50960 event pairs, 1012 based on Foata normal form. 6/8731 useless extension candidates. Maximal degree in co-relation 94521. Up to 8177 conditions per place. [2024-06-27 21:13:32,321 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 590 selfloop transitions, 137 changer transitions 0/730 dead transitions. [2024-06-27 21:13:32,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 730 transitions, 14298 flow [2024-06-27 21:13:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:13:32,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 21:13:32,323 INFO L175 Difference]: Start difference. First operand has 485 places, 698 transitions, 12179 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:13:32,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 730 transitions, 14298 flow [2024-06-27 21:13:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 730 transitions, 13882 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 21:13:40,892 INFO L231 Difference]: Finished difference. Result has 489 places, 698 transitions, 12046 flow [2024-06-27 21:13:40,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11763, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12046, PETRI_PLACES=489, PETRI_TRANSITIONS=698} [2024-06-27 21:13:40,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-27 21:13:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 698 transitions, 12046 flow [2024-06-27 21:13:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:40,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:40,893 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 21:13:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:13:40,893 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 21:13:40,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1199598053, now seen corresponding path program 5 times [2024-06-27 21:13:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951144193] [2024-06-27 21:13:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:41,461 INFO 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 21:13:41,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951144193] [2024-06-27 21:13:41,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951144193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:41,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:41,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:13:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154284368] [2024-06-27 21:13:41,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:41,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:13:41,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:13:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:13:41,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:13:41,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 698 transitions, 12046 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:41,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:41,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:13:41,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:44,357 INFO L124 PetriNetUnfolderBase]: 5893/8867 cut-off events. [2024-06-27 21:13:44,357 INFO L125 PetriNetUnfolderBase]: For 2025923/2025941 co-relation queries the response was YES. [2024-06-27 21:13:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96298 conditions, 8867 events. 5893/8867 cut-off events. For 2025923/2025941 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 51791 event pairs, 944 based on Foata normal form. 10/8863 useless extension candidates. Maximal degree in co-relation 96065. Up to 7939 conditions per place. [2024-06-27 21:13:44,508 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 562 selfloop transitions, 172 changer transitions 0/737 dead transitions. [2024-06-27 21:13:44,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 737 transitions, 14340 flow [2024-06-27 21:13:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:13:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:13:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:13:44,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-27 21:13:44,510 INFO L175 Difference]: Start difference. First operand has 489 places, 698 transitions, 12046 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:13:44,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 737 transitions, 14340 flow [2024-06-27 21:13:52,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 737 transitions, 14011 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:13:52,855 INFO L231 Difference]: Finished difference. Result has 489 places, 711 transitions, 12315 flow [2024-06-27 21:13:52,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11717, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12315, PETRI_PLACES=489, PETRI_TRANSITIONS=711} [2024-06-27 21:13:52,856 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-27 21:13:52,856 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 711 transitions, 12315 flow [2024-06-27 21:13:52,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:13:52,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:13:52,856 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 21:13:52,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:13:52,857 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 21:13:52,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:13:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash 924971566, now seen corresponding path program 2 times [2024-06-27 21:13:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:13:52,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63076922] [2024-06-27 21:13:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:13:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:13:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:13:53,525 INFO 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 21:13:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:13:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63076922] [2024-06-27 21:13:53,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63076922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:13:53,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:13:53,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:13:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006894928] [2024-06-27 21:13:53,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:13:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:13:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:13:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:13:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:13:53,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:13:53,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 711 transitions, 12315 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:13:53,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:13:53,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:13:53,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:13:56,519 INFO L124 PetriNetUnfolderBase]: 5886/8851 cut-off events. [2024-06-27 21:13:56,519 INFO L125 PetriNetUnfolderBase]: For 2027782/2027786 co-relation queries the response was YES. [2024-06-27 21:13:56,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96666 conditions, 8851 events. 5886/8851 cut-off events. For 2027782/2027786 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51642 event pairs, 1167 based on Foata normal form. 5/8854 useless extension candidates. Maximal degree in co-relation 96431. Up to 8751 conditions per place. [2024-06-27 21:13:56,675 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 688 selfloop transitions, 43 changer transitions 0/734 dead transitions. [2024-06-27 21:13:56,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 734 transitions, 13857 flow [2024-06-27 21:13:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:13:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:13:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 21:13:56,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-27 21:13:56,677 INFO L175 Difference]: Start difference. First operand has 489 places, 711 transitions, 12315 flow. Second operand 9 states and 137 transitions. [2024-06-27 21:13:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 734 transitions, 13857 flow [2024-06-27 21:14:05,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 734 transitions, 13625 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:05,640 INFO L231 Difference]: Finished difference. Result has 495 places, 711 transitions, 12175 flow [2024-06-27 21:14:05,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12083, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12175, PETRI_PLACES=495, PETRI_TRANSITIONS=711} [2024-06-27 21:14:05,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-27 21:14:05,640 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 711 transitions, 12175 flow [2024-06-27 21:14:05,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 21:14:05,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:05,641 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 21:14:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:14:05,641 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 21:14:05,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1199609213, now seen corresponding path program 6 times [2024-06-27 21:14:05,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:05,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385053997] [2024-06-27 21:14:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:05,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:06,126 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 21:14:06,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385053997] [2024-06-27 21:14:06,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385053997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:06,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:06,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466397198] [2024-06-27 21:14:06,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:06,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:06,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:06,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:14:06,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 711 transitions, 12175 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:06,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:06,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:14:06,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:09,056 INFO L124 PetriNetUnfolderBase]: 5874/8841 cut-off events. [2024-06-27 21:14:09,056 INFO L125 PetriNetUnfolderBase]: For 2051596/2051614 co-relation queries the response was YES. [2024-06-27 21:14:09,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95647 conditions, 8841 events. 5874/8841 cut-off events. For 2051596/2051614 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 51642 event pairs, 953 based on Foata normal form. 10/8837 useless extension candidates. Maximal degree in co-relation 95411. Up to 7921 conditions per place. [2024-06-27 21:14:09,224 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 568 selfloop transitions, 166 changer transitions 0/737 dead transitions. [2024-06-27 21:14:09,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 737 transitions, 14267 flow [2024-06-27 21:14:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:14:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:14:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:14:09,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:14:09,225 INFO L175 Difference]: Start difference. First operand has 495 places, 711 transitions, 12175 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:14:09,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 737 transitions, 14267 flow [2024-06-27 21:14:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 737 transitions, 14133 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 21:14:17,299 INFO L231 Difference]: Finished difference. Result has 496 places, 711 transitions, 12380 flow [2024-06-27 21:14:17,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12041, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12380, PETRI_PLACES=496, PETRI_TRANSITIONS=711} [2024-06-27 21:14:17,300 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-27 21:14:17,300 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 711 transitions, 12380 flow [2024-06-27 21:14:17,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:17,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:17,301 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 21:14:17,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:14:17,301 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 21:14:17,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash -174096709, now seen corresponding path program 7 times [2024-06-27 21:14:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718065661] [2024-06-27 21:14:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:17,793 INFO 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 21:14:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718065661] [2024-06-27 21:14:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718065661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:17,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:17,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091675023] [2024-06-27 21:14:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:17,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:14:17,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 711 transitions, 12380 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:17,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:17,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:14:17,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:20,741 INFO L124 PetriNetUnfolderBase]: 5862/8825 cut-off events. [2024-06-27 21:14:20,741 INFO L125 PetriNetUnfolderBase]: For 2055937/2055955 co-relation queries the response was YES. [2024-06-27 21:14:20,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95893 conditions, 8825 events. 5862/8825 cut-off events. For 2055937/2055955 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 51555 event pairs, 1173 based on Foata normal form. 10/8821 useless extension candidates. Maximal degree in co-relation 95656. Up to 8451 conditions per place. [2024-06-27 21:14:20,899 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 638 selfloop transitions, 89 changer transitions 0/730 dead transitions. [2024-06-27 21:14:20,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 730 transitions, 14180 flow [2024-06-27 21:14:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:14:20,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:14:20,900 INFO L175 Difference]: Start difference. First operand has 496 places, 711 transitions, 12380 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:14:20,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 730 transitions, 14180 flow [2024-06-27 21:14:29,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 730 transitions, 13876 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:29,632 INFO L231 Difference]: Finished difference. Result has 498 places, 711 transitions, 12261 flow [2024-06-27 21:14:29,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12076, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12261, PETRI_PLACES=498, PETRI_TRANSITIONS=711} [2024-06-27 21:14:29,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-27 21:14:29,632 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 711 transitions, 12261 flow [2024-06-27 21:14:29,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:29,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:29,633 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 21:14:29,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:14:29,633 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 21:14:29,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:29,633 INFO L85 PathProgramCache]: Analyzing trace with hash -612427267, now seen corresponding path program 8 times [2024-06-27 21:14:29,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:29,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393214135] [2024-06-27 21:14:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:30,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:30,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393214135] [2024-06-27 21:14:30,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393214135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:30,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:30,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839321077] [2024-06-27 21:14:30,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:30,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:30,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:30,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:14:30,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 711 transitions, 12261 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:30,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:30,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:14:30,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:32,989 INFO L124 PetriNetUnfolderBase]: 5882/8853 cut-off events. [2024-06-27 21:14:32,989 INFO L125 PetriNetUnfolderBase]: For 2084243/2084261 co-relation queries the response was YES. [2024-06-27 21:14:33,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95965 conditions, 8853 events. 5882/8853 cut-off events. For 2084243/2084261 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 51755 event pairs, 1150 based on Foata normal form. 10/8849 useless extension candidates. Maximal degree in co-relation 95728. Up to 8569 conditions per place. [2024-06-27 21:14:33,149 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 653 selfloop transitions, 76 changer transitions 0/732 dead transitions. [2024-06-27 21:14:33,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 732 transitions, 13884 flow [2024-06-27 21:14:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:14:33,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:14:33,150 INFO L175 Difference]: Start difference. First operand has 498 places, 711 transitions, 12261 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:14:33,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 732 transitions, 13884 flow [2024-06-27 21:14:41,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 732 transitions, 13688 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:14:41,940 INFO L231 Difference]: Finished difference. Result has 501 places, 716 transitions, 12328 flow [2024-06-27 21:14:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12071, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12328, PETRI_PLACES=501, PETRI_TRANSITIONS=716} [2024-06-27 21:14:41,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-27 21:14:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 716 transitions, 12328 flow [2024-06-27 21:14:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:41,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:41,950 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 21:14:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:14:41,950 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 21:14:41,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -623152027, now seen corresponding path program 9 times [2024-06-27 21:14:41,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685376073] [2024-06-27 21:14:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:14:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:14:42,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:14:42,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685376073] [2024-06-27 21:14:42,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685376073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:14:42,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:14:42,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:14:42,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194492127] [2024-06-27 21:14:42,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:14:42,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:14:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:14:42,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:14:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:14:42,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:14:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 716 transitions, 12328 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:14:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:14:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:14:45,347 INFO L124 PetriNetUnfolderBase]: 5870/8836 cut-off events. [2024-06-27 21:14:45,347 INFO L125 PetriNetUnfolderBase]: For 2081565/2081601 co-relation queries the response was YES. [2024-06-27 21:14:45,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95465 conditions, 8836 events. 5870/8836 cut-off events. For 2081565/2081601 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 51622 event pairs, 1136 based on Foata normal form. 28/8853 useless extension candidates. Maximal degree in co-relation 95226. Up to 8541 conditions per place. [2024-06-27 21:14:45,506 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 652 selfloop transitions, 82 changer transitions 0/737 dead transitions. [2024-06-27 21:14:45,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 737 transitions, 13884 flow [2024-06-27 21:14:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:14:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:14:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:14:45,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:14:45,507 INFO L175 Difference]: Start difference. First operand has 501 places, 716 transitions, 12328 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:14:45,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 737 transitions, 13884 flow [2024-06-27 21:14:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 737 transitions, 13750 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 21:14:54,833 INFO L231 Difference]: Finished difference. Result has 505 places, 716 transitions, 12368 flow [2024-06-27 21:14:54,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12368, PETRI_PLACES=505, PETRI_TRANSITIONS=716} [2024-06-27 21:14:54,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-27 21:14:54,834 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 716 transitions, 12368 flow [2024-06-27 21:14:54,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:14:54,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:14:54,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:14:54,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:14:54,834 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 21:14:54,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:14:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash -619664496, now seen corresponding path program 3 times [2024-06-27 21:14:54,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:14:54,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628935807] [2024-06-27 21:14:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:14:54,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:14:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat