./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe037.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe037.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe037.i ./goblint.2024-05-21_14-57-05.files/protection/safe037.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:36:46,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:36:46,569 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:36:46,572 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:36:46,572 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:36:46,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:36:46,601 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:36:46,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:36:46,602 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:36:46,605 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:36:46,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:36:46,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:36:46,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:36:46,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:36:46,608 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:36:46,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:36:46,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:36:46,609 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:36:46,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:36:46,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:36:46,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:36:46,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:36:46,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:36:46,610 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:36:46,611 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:36:46,611 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:36:46,611 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:36:46,611 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:36:46,612 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:36:46,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:36:46,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:36:46,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:36:46,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:36:46,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:36:46,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:36:46,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:36:46,615 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:36:46,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:36:46,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:36:46,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:36:46,616 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:36:46,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:36:46,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:36:46,617 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:36:46,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:36:46,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:36:46,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:36:46,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:36:46,863 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:36:46,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-14 11:36:47,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:36:48,153 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:36:48,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-14 11:36:48,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d92fcb98/e20bbe8993714b7cb846bc00c820618c/FLAGee46f0ef5 [2024-06-14 11:36:48,187 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d92fcb98/e20bbe8993714b7cb846bc00c820618c [2024-06-14 11:36:48,190 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:36:48,190 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:36:48,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe037.yml/witness.yml [2024-06-14 11:36:48,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:36:48,317 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:36:48,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:36:48,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:36:48,323 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:36:48,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:36:48" (1/2) ... [2024-06-14 11:36:48,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405926e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:36:48, skipping insertion in model container [2024-06-14 11:36:48,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:36:48" (1/2) ... [2024-06-14 11:36:48,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74245ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:36:48, skipping insertion in model container [2024-06-14 11:36:48,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:48" (2/2) ... [2024-06-14 11:36:48,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405926e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48, skipping insertion in model container [2024-06-14 11:36:48,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:48" (2/2) ... [2024-06-14 11:36:48,327 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:36:48,389 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:36:48,390 INFO L97 edCorrectnessWitness]: Location invariant before [L792-L792] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:36:48,390 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:36:48,391 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:36:48,391 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:36:48,391 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-14 11:36:48,429 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:36:48,794 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:36:48,802 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:36:48,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:36:48,915 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:36:48,917 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48 WrapperNode [2024-06-14 11:36:48,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:36:48,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:36:48,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:36:48,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:36:48,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,949 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-14 11:36:48,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:36:48,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:36:48,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:36:48,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:36:48,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,972 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:36:48,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,986 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,987 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:48,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:36:48,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:36:48,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:36:48,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:36:48,998 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (1/1) ... [2024-06-14 11:36:49,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:36:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:36:49,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:36:49,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:36:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:36:49,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:36:49,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:36:49,082 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:36:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:36:49,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:36:49,083 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:36:49,193 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:36:49,196 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:36:49,348 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:36:49,348 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:36:49,444 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:36:49,444 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:36:49,445 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:36:49 BoogieIcfgContainer [2024-06-14 11:36:49,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:36:49,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:36:49,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:36:49,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:36:49,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:36:48" (1/4) ... [2024-06-14 11:36:49,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f99ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:36:49, skipping insertion in model container [2024-06-14 11:36:49,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:36:48" (2/4) ... [2024-06-14 11:36:49,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f99ceb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:36:49, skipping insertion in model container [2024-06-14 11:36:49,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:36:48" (3/4) ... [2024-06-14 11:36:49,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f99ceb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:36:49, skipping insertion in model container [2024-06-14 11:36:49,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:36:49" (4/4) ... [2024-06-14 11:36:49,451 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2024-06-14 11:36:49,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:36:49,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:36:49,465 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:36:49,518 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:36:49,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:36:49,584 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:36:49,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:36:49,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:36:49,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:36:49,589 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:36:49,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:36:49,602 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;@1c655364, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:36:49,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:36:49,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:36:49,606 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:36:49,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:36:49,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:49,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:36:49,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1558372378, now seen corresponding path program 1 times [2024-06-14 11:36:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:49,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168244748] [2024-06-14 11:36:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:50,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168244748] [2024-06-14 11:36:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168244748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:36:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740992103] [2024-06-14 11:36:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:50,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:36:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:36:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:36:50,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-14 11:36:50,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:50,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:50,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-14 11:36:50,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:50,459 INFO L124 PetriNetUnfolderBase]: 471/887 cut-off events. [2024-06-14 11:36:50,460 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 11:36:50,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 887 events. 471/887 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4817 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-14 11:36:50,474 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:36:50,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 171 flow [2024-06-14 11:36:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:36:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:36:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-14 11:36:50,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-14 11:36:50,490 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 93 transitions. [2024-06-14 11:36:50,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 171 flow [2024-06-14 11:36:50,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:50,497 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:36:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 11:36:50,502 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:36:50,503 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:36:50,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:50,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:50,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:50,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:36:50,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:50,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:50,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1347776261, now seen corresponding path program 1 times [2024-06-14 11:36:50,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:50,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397389410] [2024-06-14 11:36:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:50,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:50,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397389410] [2024-06-14 11:36:50,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397389410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:50,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:50,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:36:50,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248107476] [2024-06-14 11:36:50,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:36:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:36:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:36:50,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 11:36:50,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2024-06-14 11:36:50,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:50,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 11:36:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:50,964 INFO L124 PetriNetUnfolderBase]: 569/991 cut-off events. [2024-06-14 11:36:50,964 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-14 11:36:50,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 991 events. 569/991 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5233 event pairs, 293 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 2213. Up to 861 conditions per place. [2024-06-14 11:36:50,970 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:36:50,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 240 flow [2024-06-14 11:36:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:36:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:36:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-14 11:36:50,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2024-06-14 11:36:50,974 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 119 transitions. [2024-06-14 11:36:50,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 240 flow [2024-06-14 11:36:50,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:36:50,978 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:36:50,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 11:36:50,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:36:50,979 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:36:50,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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) [2024-06-14 11:36:50,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:50,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:36:50,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:50,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1155941006, now seen corresponding path program 1 times [2024-06-14 11:36:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:50,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497408164] [2024-06-14 11:36:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:50,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497408164] [2024-06-14 11:36:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497408164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:51,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:51,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:36:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892620974] [2024-06-14 11:36:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:36:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:36:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:36:51,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 11:36:51,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:51,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 11:36:51,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:51,304 INFO L124 PetriNetUnfolderBase]: 590/1136 cut-off events. [2024-06-14 11:36:51,304 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-06-14 11:36:51,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 1136 events. 590/1136 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6345 event pairs, 313 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 2706. Up to 903 conditions per place. [2024-06-14 11:36:51,310 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:36:51,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 270 flow [2024-06-14 11:36:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:36:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:36:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 11:36:51,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-14 11:36:51,314 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 4 states and 115 transitions. [2024-06-14 11:36:51,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 270 flow [2024-06-14 11:36:51,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:51,317 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 168 flow [2024-06-14 11:36:51,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-14 11:36:51,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-06-14 11:36:51,319 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 168 flow [2024-06-14 11:36:51,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:51,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:51,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:36:51,319 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)] === [2024-06-14 11:36:51,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1786628943, now seen corresponding path program 1 times [2024-06-14 11:36:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:51,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305787020] [2024-06-14 11:36:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:51,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305787020] [2024-06-14 11:36:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305787020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078639002] [2024-06-14 11:36:51,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:51,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:51,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:51,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:51,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:51,779 INFO L124 PetriNetUnfolderBase]: 714/1293 cut-off events. [2024-06-14 11:36:51,780 INFO L125 PetriNetUnfolderBase]: For 1149/1197 co-relation queries the response was YES. [2024-06-14 11:36:51,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1293 events. 714/1293 cut-off events. For 1149/1197 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7077 event pairs, 212 based on Foata normal form. 6/1264 useless extension candidates. Maximal degree in co-relation 3411. Up to 1030 conditions per place. [2024-06-14 11:36:51,787 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-14 11:36:51,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 380 flow [2024-06-14 11:36:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 11:36:51,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-14 11:36:51,789 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 168 flow. Second operand 6 states and 166 transitions. [2024-06-14 11:36:51,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 380 flow [2024-06-14 11:36:51,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:51,792 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 211 flow [2024-06-14 11:36:51,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-14 11:36:51,794 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 11:36:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 211 flow [2024-06-14 11:36:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:51,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:51,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:36:51,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:51,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash -915401911, now seen corresponding path program 1 times [2024-06-14 11:36:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:51,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796526200] [2024-06-14 11:36:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:52,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796526200] [2024-06-14 11:36:52,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796526200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:52,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:52,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672561297] [2024-06-14 11:36:52,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:52,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:52,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:52,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:52,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:52,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:52,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:52,202 INFO L124 PetriNetUnfolderBase]: 725/1301 cut-off events. [2024-06-14 11:36:52,202 INFO L125 PetriNetUnfolderBase]: For 1865/1915 co-relation queries the response was YES. [2024-06-14 11:36:52,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 1301 events. 725/1301 cut-off events. For 1865/1915 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7120 event pairs, 270 based on Foata normal form. 4/1268 useless extension candidates. Maximal degree in co-relation 3791. Up to 1062 conditions per place. [2024-06-14 11:36:52,211 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-14 11:36:52,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 441 flow [2024-06-14 11:36:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-14 11:36:52,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-06-14 11:36:52,212 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 211 flow. Second operand 5 states and 142 transitions. [2024-06-14 11:36:52,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 441 flow [2024-06-14 11:36:52,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 412 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:52,220 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 262 flow [2024-06-14 11:36:52,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-14 11:36:52,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-14 11:36:52,222 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 262 flow [2024-06-14 11:36:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:52,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:52,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:36:52,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:52,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1021213863, now seen corresponding path program 2 times [2024-06-14 11:36:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463998072] [2024-06-14 11:36:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:52,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:52,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463998072] [2024-06-14 11:36:52,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463998072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:52,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040279421] [2024-06-14 11:36:52,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:52,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:52,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:52,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:52,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:52,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:52,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:52,542 INFO L124 PetriNetUnfolderBase]: 720/1291 cut-off events. [2024-06-14 11:36:52,543 INFO L125 PetriNetUnfolderBase]: For 2770/2841 co-relation queries the response was YES. [2024-06-14 11:36:52,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1291 events. 720/1291 cut-off events. For 2770/2841 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7020 event pairs, 279 based on Foata normal form. 24/1277 useless extension candidates. Maximal degree in co-relation 4044. Up to 1057 conditions per place. [2024-06-14 11:36:52,550 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-14 11:36:52,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 418 flow [2024-06-14 11:36:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:36:52,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-14 11:36:52,552 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 262 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:36:52,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 418 flow [2024-06-14 11:36:52,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 390 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 11:36:52,557 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 272 flow [2024-06-14 11:36:52,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-14 11:36:52,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-14 11:36:52,559 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 272 flow [2024-06-14 11:36:52,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:52,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:52,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:52,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:36:52,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:52,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -652497224, now seen corresponding path program 1 times [2024-06-14 11:36:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121118108] [2024-06-14 11:36:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:52,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121118108] [2024-06-14 11:36:52,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121118108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:52,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:52,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:36:52,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912131743] [2024-06-14 11:36:52,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:52,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:36:52,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:36:52,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:36:52,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 11:36:52,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2024-06-14 11:36:52,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:52,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 11:36:52,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:52,836 INFO L124 PetriNetUnfolderBase]: 700/1350 cut-off events. [2024-06-14 11:36:52,837 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2024-06-14 11:36:52,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1350 events. 700/1350 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7586 event pairs, 288 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 4129. Up to 1056 conditions per place. [2024-06-14 11:36:52,844 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 44 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-14 11:36:52,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 410 flow [2024-06-14 11:36:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:36:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:36:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-14 11:36:52,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:36:52,846 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 272 flow. Second operand 4 states and 110 transitions. [2024-06-14 11:36:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 410 flow [2024-06-14 11:36:52,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 368 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:52,851 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 272 flow [2024-06-14 11:36:52,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 11:36:52,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:36:52,852 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 272 flow [2024-06-14 11:36:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2024-06-14 11:36:52,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:52,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:52,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:36:52,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 766893258, now seen corresponding path program 1 times [2024-06-14 11:36:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:52,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274032486] [2024-06-14 11:36:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:53,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274032486] [2024-06-14 11:36:53,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274032486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:53,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:53,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148759810] [2024-06-14 11:36:53,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:53,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:53,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:53,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:53,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:53,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:53,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:53,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:53,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:53,231 INFO L124 PetriNetUnfolderBase]: 725/1295 cut-off events. [2024-06-14 11:36:53,231 INFO L125 PetriNetUnfolderBase]: For 3852/3936 co-relation queries the response was YES. [2024-06-14 11:36:53,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1295 events. 725/1295 cut-off events. For 3852/3936 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7062 event pairs, 255 based on Foata normal form. 2/1277 useless extension candidates. Maximal degree in co-relation 4351. Up to 1068 conditions per place. [2024-06-14 11:36:53,239 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 62 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-14 11:36:53,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 508 flow [2024-06-14 11:36:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 11:36:53,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 11:36:53,241 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 272 flow. Second operand 6 states and 165 transitions. [2024-06-14 11:36:53,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 508 flow [2024-06-14 11:36:53,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 488 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:53,246 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 314 flow [2024-06-14 11:36:53,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-14 11:36:53,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-14 11:36:53,248 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 314 flow [2024-06-14 11:36:53,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:53,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:53,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:36:53,248 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)] === [2024-06-14 11:36:53,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -947691904, now seen corresponding path program 2 times [2024-06-14 11:36:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:53,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315400632] [2024-06-14 11:36:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:53,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315400632] [2024-06-14 11:36:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315400632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:53,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:53,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:53,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995564229] [2024-06-14 11:36:53,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:53,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:53,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:53,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:53,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:53,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:53,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:53,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:53,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:53,559 INFO L124 PetriNetUnfolderBase]: 736/1315 cut-off events. [2024-06-14 11:36:53,560 INFO L125 PetriNetUnfolderBase]: For 4957/5053 co-relation queries the response was YES. [2024-06-14 11:36:53,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4769 conditions, 1315 events. 736/1315 cut-off events. For 4957/5053 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7195 event pairs, 253 based on Foata normal form. 20/1316 useless extension candidates. Maximal degree in co-relation 4745. Up to 1037 conditions per place. [2024-06-14 11:36:53,568 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 25 changer transitions 0/90 dead transitions. [2024-06-14 11:36:53,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 620 flow [2024-06-14 11:36:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 11:36:53,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 11:36:53,569 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 314 flow. Second operand 6 states and 168 transitions. [2024-06-14 11:36:53,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 620 flow [2024-06-14 11:36:53,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 582 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:53,575 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 396 flow [2024-06-14 11:36:53,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-14 11:36:53,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-14 11:36:53,577 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 396 flow [2024-06-14 11:36:53,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:53,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:36:53,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:53,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1856238190, now seen corresponding path program 3 times [2024-06-14 11:36:53,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:53,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119356788] [2024-06-14 11:36:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:53,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:53,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119356788] [2024-06-14 11:36:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119356788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:53,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:53,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090640763] [2024-06-14 11:36:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:53,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:53,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:53,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:53,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:53,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:53,911 INFO L124 PetriNetUnfolderBase]: 731/1299 cut-off events. [2024-06-14 11:36:53,911 INFO L125 PetriNetUnfolderBase]: For 6498/6614 co-relation queries the response was YES. [2024-06-14 11:36:53,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 1299 events. 731/1299 cut-off events. For 6498/6614 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7098 event pairs, 269 based on Foata normal form. 36/1313 useless extension candidates. Maximal degree in co-relation 4999. Up to 1032 conditions per place. [2024-06-14 11:36:53,922 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 25 changer transitions 0/85 dead transitions. [2024-06-14 11:36:53,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 594 flow [2024-06-14 11:36:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 11:36:53,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-06-14 11:36:53,924 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 396 flow. Second operand 6 states and 163 transitions. [2024-06-14 11:36:53,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 594 flow [2024-06-14 11:36:53,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 544 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:36:53,929 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 404 flow [2024-06-14 11:36:53,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-14 11:36:53,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-14 11:36:53,932 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 404 flow [2024-06-14 11:36:53,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:53,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:53,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:53,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:36:53,933 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:53,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 215462156, now seen corresponding path program 1 times [2024-06-14 11:36:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787214329] [2024-06-14 11:36:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787214329] [2024-06-14 11:36:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787214329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:54,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:54,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:54,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906123116] [2024-06-14 11:36:54,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:54,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:54,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:54,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:54,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:54,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:54,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:54,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:54,306 INFO L124 PetriNetUnfolderBase]: 780/1450 cut-off events. [2024-06-14 11:36:54,306 INFO L125 PetriNetUnfolderBase]: For 7030/7060 co-relation queries the response was YES. [2024-06-14 11:36:54,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5421 conditions, 1450 events. 780/1450 cut-off events. For 7030/7060 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8024 event pairs, 256 based on Foata normal form. 4/1430 useless extension candidates. Maximal degree in co-relation 5394. Up to 1155 conditions per place. [2024-06-14 11:36:54,314 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 69 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-14 11:36:54,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 659 flow [2024-06-14 11:36:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 11:36:54,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 11:36:54,315 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 404 flow. Second operand 6 states and 159 transitions. [2024-06-14 11:36:54,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 659 flow [2024-06-14 11:36:54,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 588 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:54,321 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 417 flow [2024-06-14 11:36:54,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-14 11:36:54,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-14 11:36:54,321 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 417 flow [2024-06-14 11:36:54,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:54,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:54,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:54,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:36:54,322 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:54,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash 100821467, now seen corresponding path program 1 times [2024-06-14 11:36:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:54,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4318601] [2024-06-14 11:36:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4318601] [2024-06-14 11:36:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4318601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:54,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:54,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735449994] [2024-06-14 11:36:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:54,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:54,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 417 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:54,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:54,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:54,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:54,655 INFO L124 PetriNetUnfolderBase]: 863/1543 cut-off events. [2024-06-14 11:36:54,655 INFO L125 PetriNetUnfolderBase]: For 9786/9794 co-relation queries the response was YES. [2024-06-14 11:36:54,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 1543 events. 863/1543 cut-off events. For 9786/9794 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8388 event pairs, 332 based on Foata normal form. 6/1535 useless extension candidates. Maximal degree in co-relation 6166. Up to 1273 conditions per place. [2024-06-14 11:36:54,664 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2024-06-14 11:36:54,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 96 transitions, 695 flow [2024-06-14 11:36:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:36:54,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-14 11:36:54,666 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 417 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:36:54,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 96 transitions, 695 flow [2024-06-14 11:36:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 656 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:54,673 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 485 flow [2024-06-14 11:36:54,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=485, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-14 11:36:54,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 11:36:54,674 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 485 flow [2024-06-14 11:36:54,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:54,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:54,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:54,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:36:54,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:54,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1046528717, now seen corresponding path program 2 times [2024-06-14 11:36:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080809556] [2024-06-14 11:36:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:54,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:54,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080809556] [2024-06-14 11:36:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080809556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:54,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:54,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:54,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538622863] [2024-06-14 11:36:54,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:54,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:54,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:54,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:54,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:54,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:54,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:54,959 INFO L124 PetriNetUnfolderBase]: 860/1521 cut-off events. [2024-06-14 11:36:54,960 INFO L125 PetriNetUnfolderBase]: For 11231/11235 co-relation queries the response was YES. [2024-06-14 11:36:54,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6421 conditions, 1521 events. 860/1521 cut-off events. For 11231/11235 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8226 event pairs, 338 based on Foata normal form. 5/1507 useless extension candidates. Maximal degree in co-relation 6390. Up to 1270 conditions per place. [2024-06-14 11:36:54,971 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 59 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-14 11:36:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 659 flow [2024-06-14 11:36:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:36:54,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:36:54,973 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 485 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:36:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 659 flow [2024-06-14 11:36:54,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 637 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-14 11:36:54,983 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 503 flow [2024-06-14 11:36:54,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=503, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-14 11:36:54,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 11:36:54,984 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 503 flow [2024-06-14 11:36:54,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:54,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:54,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:54,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:36:54,985 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:54,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1276169011, now seen corresponding path program 1 times [2024-06-14 11:36:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322660498] [2024-06-14 11:36:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322660498] [2024-06-14 11:36:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322660498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:55,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:55,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382489011] [2024-06-14 11:36:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:55,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:55,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:55,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:55,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 503 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:55,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:55,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:55,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:55,311 INFO L124 PetriNetUnfolderBase]: 838/1535 cut-off events. [2024-06-14 11:36:55,312 INFO L125 PetriNetUnfolderBase]: For 10401/10473 co-relation queries the response was YES. [2024-06-14 11:36:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1535 events. 838/1535 cut-off events. For 10401/10473 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8625 event pairs, 265 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6248. Up to 1242 conditions per place. [2024-06-14 11:36:55,322 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 69 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 11:36:55,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 769 flow [2024-06-14 11:36:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-14 11:36:55,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-14 11:36:55,324 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 503 flow. Second operand 5 states and 134 transitions. [2024-06-14 11:36:55,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 769 flow [2024-06-14 11:36:55,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 732 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:55,335 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 548 flow [2024-06-14 11:36:55,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-14 11:36:55,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-14 11:36:55,335 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 548 flow [2024-06-14 11:36:55,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:55,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:55,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:55,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:36:55,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:55,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1045901401, now seen corresponding path program 2 times [2024-06-14 11:36:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613253112] [2024-06-14 11:36:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:55,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613253112] [2024-06-14 11:36:55,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613253112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:55,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:55,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:36:55,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085438336] [2024-06-14 11:36:55,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:36:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:36:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:36:55,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:55,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:55,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:55,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:55,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:55,703 INFO L124 PetriNetUnfolderBase]: 835/1531 cut-off events. [2024-06-14 11:36:55,703 INFO L125 PetriNetUnfolderBase]: For 11744/11814 co-relation queries the response was YES. [2024-06-14 11:36:55,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6535 conditions, 1531 events. 835/1531 cut-off events. For 11744/11814 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8587 event pairs, 268 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 6500. Up to 1239 conditions per place. [2024-06-14 11:36:55,714 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 65 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-14 11:36:55,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 734 flow [2024-06-14 11:36:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:36:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:36:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 11:36:55,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:36:55,715 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 548 flow. Second operand 5 states and 130 transitions. [2024-06-14 11:36:55,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 734 flow [2024-06-14 11:36:55,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 704 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 11:36:55,727 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 559 flow [2024-06-14 11:36:55,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-14 11:36:55,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:36:55,728 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 559 flow [2024-06-14 11:36:55,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 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) [2024-06-14 11:36:55,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:55,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:55,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:36:55,729 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:55,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1750058421, now seen corresponding path program 1 times [2024-06-14 11:36:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598866657] [2024-06-14 11:36:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:55,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598866657] [2024-06-14 11:36:55,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598866657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:55,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294950604] [2024-06-14 11:36:55,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:55,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:55,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:55,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:55,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 559 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:55,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:55,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:55,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:56,211 INFO L124 PetriNetUnfolderBase]: 980/1736 cut-off events. [2024-06-14 11:36:56,211 INFO L125 PetriNetUnfolderBase]: For 18086/18261 co-relation queries the response was YES. [2024-06-14 11:36:56,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7963 conditions, 1736 events. 980/1736 cut-off events. For 18086/18261 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9834 event pairs, 239 based on Foata normal form. 24/1723 useless extension candidates. Maximal degree in co-relation 7926. Up to 1231 conditions per place. [2024-06-14 11:36:56,220 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 100 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-14 11:36:56,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 1005 flow [2024-06-14 11:36:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 11:36:56,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6221590909090909 [2024-06-14 11:36:56,221 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 559 flow. Second operand 8 states and 219 transitions. [2024-06-14 11:36:56,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 1005 flow [2024-06-14 11:36:56,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 959 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:56,237 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 591 flow [2024-06-14 11:36:56,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=591, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-14 11:36:56,237 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 11:36:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 591 flow [2024-06-14 11:36:56,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:56,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:36:56,238 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:56,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1860168185, now seen corresponding path program 2 times [2024-06-14 11:36:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:56,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48420341] [2024-06-14 11:36:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:56,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:56,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48420341] [2024-06-14 11:36:56,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48420341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:56,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:56,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:56,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365638723] [2024-06-14 11:36:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:56,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:56,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:56,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 591 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:56,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:56,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:56,652 INFO L124 PetriNetUnfolderBase]: 952/1700 cut-off events. [2024-06-14 11:36:56,652 INFO L125 PetriNetUnfolderBase]: For 18978/19135 co-relation queries the response was YES. [2024-06-14 11:36:56,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 1700 events. 952/1700 cut-off events. For 18978/19135 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9607 event pairs, 296 based on Foata normal form. 28/1689 useless extension candidates. Maximal degree in co-relation 7730. Up to 1322 conditions per place. [2024-06-14 11:36:56,663 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2024-06-14 11:36:56,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 905 flow [2024-06-14 11:36:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 11:36:56,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201298701298701 [2024-06-14 11:36:56,664 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 591 flow. Second operand 7 states and 191 transitions. [2024-06-14 11:36:56,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 905 flow [2024-06-14 11:36:56,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 877 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:56,680 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 598 flow [2024-06-14 11:36:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2024-06-14 11:36:56,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-14 11:36:56,680 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 598 flow [2024-06-14 11:36:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:56,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:56,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:36:56,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1579237881, now seen corresponding path program 3 times [2024-06-14 11:36:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988480664] [2024-06-14 11:36:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:56,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:56,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988480664] [2024-06-14 11:36:56,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988480664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:56,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:56,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:56,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808218068] [2024-06-14 11:36:56,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:56,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:56,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:56,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:56,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:56,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:56,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:56,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:56,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:56,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:57,065 INFO L124 PetriNetUnfolderBase]: 1010/1797 cut-off events. [2024-06-14 11:36:57,065 INFO L125 PetriNetUnfolderBase]: For 21577/21734 co-relation queries the response was YES. [2024-06-14 11:36:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8294 conditions, 1797 events. 1010/1797 cut-off events. For 21577/21734 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10441 event pairs, 319 based on Foata normal form. 44/1793 useless extension candidates. Maximal degree in co-relation 8255. Up to 1370 conditions per place. [2024-06-14 11:36:57,076 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 78 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-14 11:36:57,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 920 flow [2024-06-14 11:36:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 11:36:57,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-06-14 11:36:57,078 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 598 flow. Second operand 7 states and 192 transitions. [2024-06-14 11:36:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 920 flow [2024-06-14 11:36:57,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 887 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:57,096 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 650 flow [2024-06-14 11:36:57,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=650, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-06-14 11:36:57,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 11:36:57,096 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 650 flow [2024-06-14 11:36:57,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:57,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:57,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:57,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:36:57,097 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:57,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash 206047913, now seen corresponding path program 1 times [2024-06-14 11:36:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38648462] [2024-06-14 11:36:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:57,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38648462] [2024-06-14 11:36:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38648462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:57,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500294380] [2024-06-14 11:36:57,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:57,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:57,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:57,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:57,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:57,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 650 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:57,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:57,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:57,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:57,513 INFO L124 PetriNetUnfolderBase]: 1180/2033 cut-off events. [2024-06-14 11:36:57,513 INFO L125 PetriNetUnfolderBase]: For 24295/24295 co-relation queries the response was YES. [2024-06-14 11:36:57,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 2033 events. 1180/2033 cut-off events. For 24295/24295 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11452 event pairs, 353 based on Foata normal form. 4/2029 useless extension candidates. Maximal degree in co-relation 9363. Up to 1727 conditions per place. [2024-06-14 11:36:57,528 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-14 11:36:57,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 995 flow [2024-06-14 11:36:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:36:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-14 11:36:57,529 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 650 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:36:57,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 995 flow [2024-06-14 11:36:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 122 transitions, 930 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:57,553 INFO L231 Difference]: Finished difference. Result has 95 places, 94 transitions, 693 flow [2024-06-14 11:36:57,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=693, PETRI_PLACES=95, PETRI_TRANSITIONS=94} [2024-06-14 11:36:57,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-14 11:36:57,554 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 94 transitions, 693 flow [2024-06-14 11:36:57,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:57,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:57,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:57,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:36:57,554 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:57,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1433486413, now seen corresponding path program 4 times [2024-06-14 11:36:57,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:57,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833517875] [2024-06-14 11:36:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:57,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833517875] [2024-06-14 11:36:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833517875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:57,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:57,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878567186] [2024-06-14 11:36:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:57,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:36:57,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 693 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:57,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:57,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:36:57,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:57,988 INFO L124 PetriNetUnfolderBase]: 1045/1873 cut-off events. [2024-06-14 11:36:57,989 INFO L125 PetriNetUnfolderBase]: For 25494/25652 co-relation queries the response was YES. [2024-06-14 11:36:57,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8853 conditions, 1873 events. 1045/1873 cut-off events. For 25494/25652 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10908 event pairs, 321 based on Foata normal form. 46/1864 useless extension candidates. Maximal degree in co-relation 8811. Up to 1428 conditions per place. [2024-06-14 11:36:58,001 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 79 selfloop transitions, 29 changer transitions 0/122 dead transitions. [2024-06-14 11:36:58,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 1015 flow [2024-06-14 11:36:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:36:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-14 11:36:58,002 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 693 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:36:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 1015 flow [2024-06-14 11:36:58,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 952 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:58,019 INFO L231 Difference]: Finished difference. Result has 98 places, 95 transitions, 721 flow [2024-06-14 11:36:58,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=721, PETRI_PLACES=98, PETRI_TRANSITIONS=95} [2024-06-14 11:36:58,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-14 11:36:58,020 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 95 transitions, 721 flow [2024-06-14 11:36:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:58,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:58,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:58,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:36:58,020 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:58,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1243554795, now seen corresponding path program 2 times [2024-06-14 11:36:58,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:58,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486623757] [2024-06-14 11:36:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:58,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:58,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486623757] [2024-06-14 11:36:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486623757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:58,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:58,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806880610] [2024-06-14 11:36:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:58,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:58,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 721 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:58,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:58,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:58,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:58,411 INFO L124 PetriNetUnfolderBase]: 1233/2138 cut-off events. [2024-06-14 11:36:58,411 INFO L125 PetriNetUnfolderBase]: For 28445/28445 co-relation queries the response was YES. [2024-06-14 11:36:58,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10121 conditions, 2138 events. 1233/2138 cut-off events. For 28445/28445 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12128 event pairs, 365 based on Foata normal form. 4/2137 useless extension candidates. Maximal degree in co-relation 10078. Up to 1813 conditions per place. [2024-06-14 11:36:58,426 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-14 11:36:58,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1076 flow [2024-06-14 11:36:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:36:58,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 11:36:58,427 INFO L175 Difference]: Start difference. First operand has 98 places, 95 transitions, 721 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:36:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1076 flow [2024-06-14 11:36:58,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 125 transitions, 1003 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:58,452 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 780 flow [2024-06-14 11:36:58,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=780, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-06-14 11:36:58,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 11:36:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 780 flow [2024-06-14 11:36:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:58,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:58,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:36:58,454 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)] === [2024-06-14 11:36:58,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 890235883, now seen corresponding path program 3 times [2024-06-14 11:36:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215688249] [2024-06-14 11:36:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:58,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215688249] [2024-06-14 11:36:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215688249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769704343] [2024-06-14 11:36:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:58,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:58,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:58,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:58,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:58,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:58,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:58,861 INFO L124 PetriNetUnfolderBase]: 1250/2170 cut-off events. [2024-06-14 11:36:58,861 INFO L125 PetriNetUnfolderBase]: For 30692/30692 co-relation queries the response was YES. [2024-06-14 11:36:58,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10464 conditions, 2170 events. 1250/2170 cut-off events. For 30692/30692 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12405 event pairs, 370 based on Foata normal form. 4/2169 useless extension candidates. Maximal degree in co-relation 10419. Up to 1840 conditions per place. [2024-06-14 11:36:58,875 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 92 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-14 11:36:58,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 129 transitions, 1135 flow [2024-06-14 11:36:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:36:58,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 11:36:58,877 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 780 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:36:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 129 transitions, 1135 flow [2024-06-14 11:36:58,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 1054 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:58,902 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 821 flow [2024-06-14 11:36:58,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=821, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2024-06-14 11:36:58,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-14 11:36:58,902 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 821 flow [2024-06-14 11:36:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:58,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:58,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:58,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:36:58,903 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)] === [2024-06-14 11:36:58,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 900711403, now seen corresponding path program 4 times [2024-06-14 11:36:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:58,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639142227] [2024-06-14 11:36:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639142227] [2024-06-14 11:36:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639142227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015222455] [2024-06-14 11:36:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:59,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:59,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 821 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:59,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:59,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:59,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:59,309 INFO L124 PetriNetUnfolderBase]: 1242/2163 cut-off events. [2024-06-14 11:36:59,309 INFO L125 PetriNetUnfolderBase]: For 32330/32330 co-relation queries the response was YES. [2024-06-14 11:36:59,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10484 conditions, 2163 events. 1242/2163 cut-off events. For 32330/32330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12388 event pairs, 318 based on Foata normal form. 4/2162 useless extension candidates. Maximal degree in co-relation 10438. Up to 1751 conditions per place. [2024-06-14 11:36:59,325 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-14 11:36:59,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 132 transitions, 1169 flow [2024-06-14 11:36:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:36:59,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 11:36:59,326 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 821 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:36:59,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 132 transitions, 1169 flow [2024-06-14 11:36:59,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 1098 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:36:59,362 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 871 flow [2024-06-14 11:36:59,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=871, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2024-06-14 11:36:59,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-14 11:36:59,364 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 871 flow [2024-06-14 11:36:59,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:59,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:59,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:59,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:36:59,365 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:59,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -447776562, now seen corresponding path program 1 times [2024-06-14 11:36:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751778745] [2024-06-14 11:36:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751778745] [2024-06-14 11:36:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751778745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:59,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071531385] [2024-06-14 11:36:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:59,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:59,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 871 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:59,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:59,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:59,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:59,716 INFO L124 PetriNetUnfolderBase]: 1255/2185 cut-off events. [2024-06-14 11:36:59,717 INFO L125 PetriNetUnfolderBase]: For 34716/34716 co-relation queries the response was YES. [2024-06-14 11:36:59,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10781 conditions, 2185 events. 1255/2185 cut-off events. For 34716/34716 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12544 event pairs, 367 based on Foata normal form. 1/2180 useless extension candidates. Maximal degree in co-relation 10734. Up to 1868 conditions per place. [2024-06-14 11:36:59,732 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 106 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-14 11:36:59,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 146 transitions, 1407 flow [2024-06-14 11:36:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:36:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:36:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:36:59,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 11:36:59,735 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 871 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:36:59,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 146 transitions, 1407 flow [2024-06-14 11:36:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1304 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:59,774 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1003 flow [2024-06-14 11:36:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-14 11:36:59,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 11:36:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1003 flow [2024-06-14 11:36:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:59,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:59,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:36:59,776 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:59,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2009764566, now seen corresponding path program 2 times [2024-06-14 11:36:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:59,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578624728] [2024-06-14 11:36:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578624728] [2024-06-14 11:36:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578624728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:59,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:59,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:36:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586247144] [2024-06-14 11:36:59,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:36:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:36:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:36:59,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:36:59,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1003 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:59,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:59,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:36:59,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:00,159 INFO L124 PetriNetUnfolderBase]: 1268/2207 cut-off events. [2024-06-14 11:37:00,160 INFO L125 PetriNetUnfolderBase]: For 37651/37651 co-relation queries the response was YES. [2024-06-14 11:37:00,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11191 conditions, 2207 events. 1268/2207 cut-off events. For 37651/37651 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12649 event pairs, 367 based on Foata normal form. 1/2202 useless extension candidates. Maximal degree in co-relation 11141. Up to 1883 conditions per place. [2024-06-14 11:37:00,175 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 103 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2024-06-14 11:37:00,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1486 flow [2024-06-14 11:37:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:37:00,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 11:37:00,176 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1003 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:37:00,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1486 flow [2024-06-14 11:37:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1446 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-14 11:37:00,227 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1106 flow [2024-06-14 11:37:00,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-14 11:37:00,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-14 11:37:00,227 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1106 flow [2024-06-14 11:37:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:00,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:00,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:00,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:37:00,228 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:00,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1894771334, now seen corresponding path program 1 times [2024-06-14 11:37:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819482246] [2024-06-14 11:37:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:00,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819482246] [2024-06-14 11:37:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819482246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:00,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656490359] [2024-06-14 11:37:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:00,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:00,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:00,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:00,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:00,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:00,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:00,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:00,615 INFO L124 PetriNetUnfolderBase]: 1214/2164 cut-off events. [2024-06-14 11:37:00,616 INFO L125 PetriNetUnfolderBase]: For 41062/41062 co-relation queries the response was YES. [2024-06-14 11:37:00,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11042 conditions, 2164 events. 1214/2164 cut-off events. For 41062/41062 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12729 event pairs, 356 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 10989. Up to 1754 conditions per place. [2024-06-14 11:37:00,636 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-14 11:37:00,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1512 flow [2024-06-14 11:37:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:37:00,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 11:37:00,638 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1106 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:37:00,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1512 flow [2024-06-14 11:37:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 154 transitions, 1457 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:00,684 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1174 flow [2024-06-14 11:37:00,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-14 11:37:00,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 11:37:00,685 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1174 flow [2024-06-14 11:37:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:00,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:00,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:00,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:37:00,686 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1715695578, now seen corresponding path program 3 times [2024-06-14 11:37:00,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236332837] [2024-06-14 11:37:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236332837] [2024-06-14 11:37:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236332837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669485779] [2024-06-14 11:37:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:00,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1174 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:00,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:00,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:01,105 INFO L124 PetriNetUnfolderBase]: 1275/2219 cut-off events. [2024-06-14 11:37:01,105 INFO L125 PetriNetUnfolderBase]: For 43067/43067 co-relation queries the response was YES. [2024-06-14 11:37:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 2219 events. 1275/2219 cut-off events. For 43067/43067 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12763 event pairs, 369 based on Foata normal form. 1/2213 useless extension candidates. Maximal degree in co-relation 11539. Up to 1894 conditions per place. [2024-06-14 11:37:01,121 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-14 11:37:01,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 157 transitions, 1648 flow [2024-06-14 11:37:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:37:01,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 11:37:01,124 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1174 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:37:01,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 157 transitions, 1648 flow [2024-06-14 11:37:01,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 157 transitions, 1593 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:01,162 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1233 flow [2024-06-14 11:37:01,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1233, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-14 11:37:01,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 11:37:01,163 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1233 flow [2024-06-14 11:37:01,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:01,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:01,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:37:01,164 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:01,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1962257900, now seen corresponding path program 4 times [2024-06-14 11:37:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985640007] [2024-06-14 11:37:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985640007] [2024-06-14 11:37:01,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985640007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:01,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:01,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:01,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315069942] [2024-06-14 11:37:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:01,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:01,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:01,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:01,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:01,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1233 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:01,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:01,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:01,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:01,522 INFO L124 PetriNetUnfolderBase]: 1280/2228 cut-off events. [2024-06-14 11:37:01,522 INFO L125 PetriNetUnfolderBase]: For 45927/45927 co-relation queries the response was YES. [2024-06-14 11:37:01,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11802 conditions, 2228 events. 1280/2228 cut-off events. For 45927/45927 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12848 event pairs, 369 based on Foata normal form. 1/2222 useless extension candidates. Maximal degree in co-relation 11746. Up to 1900 conditions per place. [2024-06-14 11:37:01,537 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 105 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-06-14 11:37:01,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 1664 flow [2024-06-14 11:37:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:37:01,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:37:01,539 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1233 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:37:01,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 1664 flow [2024-06-14 11:37:01,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1612 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 11:37:01,581 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1320 flow [2024-06-14 11:37:01,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1320, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-14 11:37:01,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 11:37:01,582 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1320 flow [2024-06-14 11:37:01,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:01,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:01,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:01,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:37:01,583 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:01,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash 88929912, now seen corresponding path program 5 times [2024-06-14 11:37:01,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:01,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722469421] [2024-06-14 11:37:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:01,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722469421] [2024-06-14 11:37:01,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722469421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:01,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089274190] [2024-06-14 11:37:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:01,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1320 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:01,974 INFO L124 PetriNetUnfolderBase]: 1277/2219 cut-off events. [2024-06-14 11:37:01,974 INFO L125 PetriNetUnfolderBase]: For 48802/48802 co-relation queries the response was YES. [2024-06-14 11:37:01,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11860 conditions, 2219 events. 1277/2219 cut-off events. For 48802/48802 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12819 event pairs, 378 based on Foata normal form. 1/2211 useless extension candidates. Maximal degree in co-relation 11802. Up to 1897 conditions per place. [2024-06-14 11:37:01,990 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-14 11:37:01,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1692 flow [2024-06-14 11:37:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:37:01,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:37:01,991 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1320 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:37:01,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1692 flow [2024-06-14 11:37:02,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 154 transitions, 1626 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:02,038 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1346 flow [2024-06-14 11:37:02,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1346, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-14 11:37:02,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 11:37:02,039 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1346 flow [2024-06-14 11:37:02,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:02,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:02,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:37:02,039 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:02,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1937375958, now seen corresponding path program 6 times [2024-06-14 11:37:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:02,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547000514] [2024-06-14 11:37:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:02,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:02,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547000514] [2024-06-14 11:37:02,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547000514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:02,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:02,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:02,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584007813] [2024-06-14 11:37:02,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:02,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:02,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:02,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1346 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:02,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:02,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:02,408 INFO L124 PetriNetUnfolderBase]: 1274/2215 cut-off events. [2024-06-14 11:37:02,409 INFO L125 PetriNetUnfolderBase]: For 51296/51296 co-relation queries the response was YES. [2024-06-14 11:37:02,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11916 conditions, 2215 events. 1274/2215 cut-off events. For 51296/51296 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12770 event pairs, 378 based on Foata normal form. 1/2207 useless extension candidates. Maximal degree in co-relation 11857. Up to 1894 conditions per place. [2024-06-14 11:37:02,424 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 43 changer transitions 0/153 dead transitions. [2024-06-14 11:37:02,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 153 transitions, 1658 flow [2024-06-14 11:37:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:37:02,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 11:37:02,426 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1346 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:37:02,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 153 transitions, 1658 flow [2024-06-14 11:37:02,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 153 transitions, 1566 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:02,487 INFO L231 Difference]: Finished difference. Result has 136 places, 143 transitions, 1346 flow [2024-06-14 11:37:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1346, PETRI_PLACES=136, PETRI_TRANSITIONS=143} [2024-06-14 11:37:02,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-14 11:37:02,488 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 143 transitions, 1346 flow [2024-06-14 11:37:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:02,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:37:02,488 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:02,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1937384886, now seen corresponding path program 2 times [2024-06-14 11:37:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661385446] [2024-06-14 11:37:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:02,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661385446] [2024-06-14 11:37:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661385446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:02,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746753539] [2024-06-14 11:37:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:02,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:02,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:02,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 143 transitions, 1346 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:02,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:02,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:02,887 INFO L124 PetriNetUnfolderBase]: 1215/2157 cut-off events. [2024-06-14 11:37:02,887 INFO L125 PetriNetUnfolderBase]: For 55103/55103 co-relation queries the response was YES. [2024-06-14 11:37:02,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11709 conditions, 2157 events. 1215/2157 cut-off events. For 55103/55103 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12760 event pairs, 361 based on Foata normal form. 2/2141 useless extension candidates. Maximal degree in co-relation 11650. Up to 1756 conditions per place. [2024-06-14 11:37:02,903 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 99 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-14 11:37:02,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 157 transitions, 1722 flow [2024-06-14 11:37:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 11:37:02,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 11:37:02,905 INFO L175 Difference]: Start difference. First operand has 136 places, 143 transitions, 1346 flow. Second operand 6 states and 154 transitions. [2024-06-14 11:37:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 157 transitions, 1722 flow [2024-06-14 11:37:02,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 157 transitions, 1640 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:02,963 INFO L231 Difference]: Finished difference. Result has 138 places, 146 transitions, 1363 flow [2024-06-14 11:37:02,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1363, PETRI_PLACES=138, PETRI_TRANSITIONS=146} [2024-06-14 11:37:02,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-14 11:37:02,963 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 146 transitions, 1363 flow [2024-06-14 11:37:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:02,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:02,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:02,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:37:02,964 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:02,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1952622006, now seen corresponding path program 3 times [2024-06-14 11:37:02,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452163422] [2024-06-14 11:37:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452163422] [2024-06-14 11:37:03,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452163422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:03,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:03,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4494858] [2024-06-14 11:37:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:03,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:03,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:03,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 146 transitions, 1363 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:03,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:03,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:03,427 INFO L124 PetriNetUnfolderBase]: 1209/2168 cut-off events. [2024-06-14 11:37:03,427 INFO L125 PetriNetUnfolderBase]: For 57157/57157 co-relation queries the response was YES. [2024-06-14 11:37:03,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11728 conditions, 2168 events. 1209/2168 cut-off events. For 57157/57157 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12821 event pairs, 353 based on Foata normal form. 2/2159 useless extension candidates. Maximal degree in co-relation 11668. Up to 1786 conditions per place. [2024-06-14 11:37:03,443 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 115 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-14 11:37:03,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 156 transitions, 1643 flow [2024-06-14 11:37:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:37:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 11:37:03,444 INFO L175 Difference]: Start difference. First operand has 138 places, 146 transitions, 1363 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:37:03,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 156 transitions, 1643 flow [2024-06-14 11:37:03,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 156 transitions, 1545 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:03,515 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1297 flow [2024-06-14 11:37:03,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1297, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2024-06-14 11:37:03,516 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 11:37:03,516 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1297 flow [2024-06-14 11:37:03,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:03,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:03,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:03,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:37:03,517 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:03,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash -171999818, now seen corresponding path program 1 times [2024-06-14 11:37:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710712175] [2024-06-14 11:37:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:03,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:03,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710712175] [2024-06-14 11:37:03,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710712175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:03,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014406539] [2024-06-14 11:37:03,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:03,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:03,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1297 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:03,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:03,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:03,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:03,904 INFO L124 PetriNetUnfolderBase]: 1214/2187 cut-off events. [2024-06-14 11:37:03,904 INFO L125 PetriNetUnfolderBase]: For 49204/49308 co-relation queries the response was YES. [2024-06-14 11:37:03,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2187 events. 1214/2187 cut-off events. For 49204/49308 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13004 event pairs, 312 based on Foata normal form. 1/2147 useless extension candidates. Maximal degree in co-relation 11263. Up to 1825 conditions per place. [2024-06-14 11:37:03,919 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 13 changer transitions 0/165 dead transitions. [2024-06-14 11:37:03,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 1651 flow [2024-06-14 11:37:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:37:03,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-14 11:37:03,920 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1297 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:37:03,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 1651 flow [2024-06-14 11:37:03,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 165 transitions, 1590 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:03,969 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1304 flow [2024-06-14 11:37:03,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1304, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-14 11:37:03,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:37:03,970 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1304 flow [2024-06-14 11:37:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:03,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:03,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:37:03,971 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -167238218, now seen corresponding path program 2 times [2024-06-14 11:37:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376035434] [2024-06-14 11:37:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376035434] [2024-06-14 11:37:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376035434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:04,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:04,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418868149] [2024-06-14 11:37:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:04,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:04,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:04,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1304 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:04,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:04,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:04,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:04,363 INFO L124 PetriNetUnfolderBase]: 1229/2210 cut-off events. [2024-06-14 11:37:04,363 INFO L125 PetriNetUnfolderBase]: For 52327/52479 co-relation queries the response was YES. [2024-06-14 11:37:04,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 2210 events. 1229/2210 cut-off events. For 52327/52479 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13140 event pairs, 313 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 11690. Up to 1821 conditions per place. [2024-06-14 11:37:04,379 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 116 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-14 11:37:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 169 transitions, 1768 flow [2024-06-14 11:37:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:37:04,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 11:37:04,381 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1304 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:37:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 169 transitions, 1768 flow [2024-06-14 11:37:04,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1722 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:04,432 INFO L231 Difference]: Finished difference. Result has 141 places, 155 transitions, 1403 flow [2024-06-14 11:37:04,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1403, PETRI_PLACES=141, PETRI_TRANSITIONS=155} [2024-06-14 11:37:04,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:37:04,433 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 155 transitions, 1403 flow [2024-06-14 11:37:04,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:04,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:04,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:04,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:37:04,434 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:04,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 892402110, now seen corresponding path program 3 times [2024-06-14 11:37:04,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:04,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476975604] [2024-06-14 11:37:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:04,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:04,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476975604] [2024-06-14 11:37:04,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476975604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:04,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:04,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:04,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182864078] [2024-06-14 11:37:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:04,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:04,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:04,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:04,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 155 transitions, 1403 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:04,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:04,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:04,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:04,803 INFO L124 PetriNetUnfolderBase]: 1221/2195 cut-off events. [2024-06-14 11:37:04,803 INFO L125 PetriNetUnfolderBase]: For 55474/55634 co-relation queries the response was YES. [2024-06-14 11:37:04,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 2195 events. 1221/2195 cut-off events. For 55474/55634 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13033 event pairs, 320 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 11853. Up to 1811 conditions per place. [2024-06-14 11:37:04,820 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-14 11:37:04,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 165 transitions, 1711 flow [2024-06-14 11:37:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:37:04,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:37:04,821 INFO L175 Difference]: Start difference. First operand has 141 places, 155 transitions, 1403 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:37:04,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 165 transitions, 1711 flow [2024-06-14 11:37:04,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 165 transitions, 1645 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:04,883 INFO L231 Difference]: Finished difference. Result has 145 places, 155 transitions, 1404 flow [2024-06-14 11:37:04,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1404, PETRI_PLACES=145, PETRI_TRANSITIONS=155} [2024-06-14 11:37:04,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 11:37:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 155 transitions, 1404 flow [2024-06-14 11:37:04,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:04,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:04,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:04,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:37:04,884 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639862, now seen corresponding path program 1 times [2024-06-14 11:37:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968241427] [2024-06-14 11:37:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:05,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968241427] [2024-06-14 11:37:05,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968241427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:05,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:37:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266597345] [2024-06-14 11:37:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:05,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:37:05,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:37:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:37:05,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:05,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 155 transitions, 1404 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:05,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:05,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:05,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:05,287 INFO L124 PetriNetUnfolderBase]: 1218/2189 cut-off events. [2024-06-14 11:37:05,287 INFO L125 PetriNetUnfolderBase]: For 68398/68398 co-relation queries the response was YES. [2024-06-14 11:37:05,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12405 conditions, 2189 events. 1218/2189 cut-off events. For 68398/68398 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12976 event pairs, 350 based on Foata normal form. 2/2180 useless extension candidates. Maximal degree in co-relation 12342. Up to 1796 conditions per place. [2024-06-14 11:37:05,301 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 128 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2024-06-14 11:37:05,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 168 transitions, 1740 flow [2024-06-14 11:37:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:37:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:37:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:37:05,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 11:37:05,303 INFO L175 Difference]: Start difference. First operand has 145 places, 155 transitions, 1404 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:37:05,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 168 transitions, 1740 flow [2024-06-14 11:37:05,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 168 transitions, 1659 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:05,371 INFO L231 Difference]: Finished difference. Result has 146 places, 157 transitions, 1386 flow [2024-06-14 11:37:05,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1386, PETRI_PLACES=146, PETRI_TRANSITIONS=157} [2024-06-14 11:37:05,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-14 11:37:05,372 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 157 transitions, 1386 flow [2024-06-14 11:37:05,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:05,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:05,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:37:05,372 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)] === [2024-06-14 11:37:05,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1672104650, now seen corresponding path program 1 times [2024-06-14 11:37:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:05,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198219053] [2024-06-14 11:37:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:05,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:05,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198219053] [2024-06-14 11:37:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198219053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:05,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:05,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191953447] [2024-06-14 11:37:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:05,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:05,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:05,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:05,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:05,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 157 transitions, 1386 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:05,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:05,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:05,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:06,001 INFO L124 PetriNetUnfolderBase]: 1410/2485 cut-off events. [2024-06-14 11:37:06,001 INFO L125 PetriNetUnfolderBase]: For 76634/76634 co-relation queries the response was YES. [2024-06-14 11:37:06,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13790 conditions, 2485 events. 1410/2485 cut-off events. For 76634/76634 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14811 event pairs, 349 based on Foata normal form. 12/2487 useless extension candidates. Maximal degree in co-relation 13726. Up to 1768 conditions per place. [2024-06-14 11:37:06,020 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 41 changer transitions 0/203 dead transitions. [2024-06-14 11:37:06,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 203 transitions, 1998 flow [2024-06-14 11:37:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 11:37:06,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6079545454545454 [2024-06-14 11:37:06,021 INFO L175 Difference]: Start difference. First operand has 146 places, 157 transitions, 1386 flow. Second operand 8 states and 214 transitions. [2024-06-14 11:37:06,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 203 transitions, 1998 flow [2024-06-14 11:37:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 1951 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:06,123 INFO L231 Difference]: Finished difference. Result has 152 places, 165 transitions, 1547 flow [2024-06-14 11:37:06,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1547, PETRI_PLACES=152, PETRI_TRANSITIONS=165} [2024-06-14 11:37:06,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-14 11:37:06,124 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 165 transitions, 1547 flow [2024-06-14 11:37:06,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:06,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:06,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:06,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:37:06,125 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)] === [2024-06-14 11:37:06,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1561069622, now seen corresponding path program 2 times [2024-06-14 11:37:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502172528] [2024-06-14 11:37:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502172528] [2024-06-14 11:37:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502172528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:06,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774050971] [2024-06-14 11:37:06,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:06,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:06,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 165 transitions, 1547 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:06,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:06,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:06,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:06,669 INFO L124 PetriNetUnfolderBase]: 1520/2699 cut-off events. [2024-06-14 11:37:06,669 INFO L125 PetriNetUnfolderBase]: For 83323/83323 co-relation queries the response was YES. [2024-06-14 11:37:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15171 conditions, 2699 events. 1520/2699 cut-off events. For 83323/83323 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16570 event pairs, 389 based on Foata normal form. 12/2703 useless extension candidates. Maximal degree in co-relation 15104. Up to 2041 conditions per place. [2024-06-14 11:37:06,691 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 43 changer transitions 0/205 dead transitions. [2024-06-14 11:37:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 205 transitions, 2136 flow [2024-06-14 11:37:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 11:37:06,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 11:37:06,693 INFO L175 Difference]: Start difference. First operand has 152 places, 165 transitions, 1547 flow. Second operand 8 states and 212 transitions. [2024-06-14 11:37:06,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 205 transitions, 2136 flow [2024-06-14 11:37:06,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 205 transitions, 2050 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:06,826 INFO L231 Difference]: Finished difference. Result has 159 places, 171 transitions, 1658 flow [2024-06-14 11:37:06,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=159, PETRI_TRANSITIONS=171} [2024-06-14 11:37:06,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 11:37:06,826 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 171 transitions, 1658 flow [2024-06-14 11:37:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:06,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:06,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:37:06,827 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)] === [2024-06-14 11:37:06,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -13384598, now seen corresponding path program 3 times [2024-06-14 11:37:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:06,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968145811] [2024-06-14 11:37:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:06,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968145811] [2024-06-14 11:37:06,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968145811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:06,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984500973] [2024-06-14 11:37:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:07,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:07,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 171 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:07,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:07,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:07,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:07,387 INFO L124 PetriNetUnfolderBase]: 1602/2851 cut-off events. [2024-06-14 11:37:07,387 INFO L125 PetriNetUnfolderBase]: For 89186/89186 co-relation queries the response was YES. [2024-06-14 11:37:07,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16070 conditions, 2851 events. 1602/2851 cut-off events. For 89186/89186 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17826 event pairs, 414 based on Foata normal form. 12/2855 useless extension candidates. Maximal degree in co-relation 16000. Up to 2183 conditions per place. [2024-06-14 11:37:07,408 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 153 selfloop transitions, 47 changer transitions 0/209 dead transitions. [2024-06-14 11:37:07,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2242 flow [2024-06-14 11:37:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 11:37:07,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5994318181818182 [2024-06-14 11:37:07,409 INFO L175 Difference]: Start difference. First operand has 159 places, 171 transitions, 1658 flow. Second operand 8 states and 211 transitions. [2024-06-14 11:37:07,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2242 flow [2024-06-14 11:37:07,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 209 transitions, 2147 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:07,538 INFO L231 Difference]: Finished difference. Result has 165 places, 175 transitions, 1743 flow [2024-06-14 11:37:07,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1743, PETRI_PLACES=165, PETRI_TRANSITIONS=175} [2024-06-14 11:37:07,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-14 11:37:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 175 transitions, 1743 flow [2024-06-14 11:37:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:07,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:07,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:37:07,541 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)] === [2024-06-14 11:37:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1999723830, now seen corresponding path program 4 times [2024-06-14 11:37:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:07,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248096441] [2024-06-14 11:37:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248096441] [2024-06-14 11:37:07,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248096441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:07,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:07,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887614960] [2024-06-14 11:37:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:07,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:07,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:07,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 175 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:07,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:07,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:07,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:08,082 INFO L124 PetriNetUnfolderBase]: 1582/2811 cut-off events. [2024-06-14 11:37:08,087 INFO L125 PetriNetUnfolderBase]: For 86777/86777 co-relation queries the response was YES. [2024-06-14 11:37:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15490 conditions, 2811 events. 1582/2811 cut-off events. For 86777/86777 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17560 event pairs, 359 based on Foata normal form. 12/2815 useless extension candidates. Maximal degree in co-relation 15418. Up to 1591 conditions per place. [2024-06-14 11:37:08,111 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 57 changer transitions 0/209 dead transitions. [2024-06-14 11:37:08,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2215 flow [2024-06-14 11:37:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 11:37:08,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-14 11:37:08,112 INFO L175 Difference]: Start difference. First operand has 165 places, 175 transitions, 1743 flow. Second operand 8 states and 210 transitions. [2024-06-14 11:37:08,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2215 flow [2024-06-14 11:37:08,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 209 transitions, 2122 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:08,290 INFO L231 Difference]: Finished difference. Result has 169 places, 174 transitions, 1724 flow [2024-06-14 11:37:08,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1724, PETRI_PLACES=169, PETRI_TRANSITIONS=174} [2024-06-14 11:37:08,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-14 11:37:08,291 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 174 transitions, 1724 flow [2024-06-14 11:37:08,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:08,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:37:08,291 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:08,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 755427385, now seen corresponding path program 1 times [2024-06-14 11:37:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603737714] [2024-06-14 11:37:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:08,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603737714] [2024-06-14 11:37:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603737714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:08,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:08,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172944956] [2024-06-14 11:37:08,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:08,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:08,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 174 transitions, 1724 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:08,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:08,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:08,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:08,834 INFO L124 PetriNetUnfolderBase]: 1595/2850 cut-off events. [2024-06-14 11:37:08,834 INFO L125 PetriNetUnfolderBase]: For 84787/84787 co-relation queries the response was YES. [2024-06-14 11:37:08,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15708 conditions, 2850 events. 1595/2850 cut-off events. For 84787/84787 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17901 event pairs, 401 based on Foata normal form. 1/2848 useless extension candidates. Maximal degree in co-relation 15635. Up to 2449 conditions per place. [2024-06-14 11:37:08,860 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 168 selfloop transitions, 31 changer transitions 0/208 dead transitions. [2024-06-14 11:37:08,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 208 transitions, 2336 flow [2024-06-14 11:37:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 11:37:08,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 11:37:08,861 INFO L175 Difference]: Start difference. First operand has 169 places, 174 transitions, 1724 flow. Second operand 7 states and 183 transitions. [2024-06-14 11:37:08,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 208 transitions, 2336 flow [2024-06-14 11:37:08,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 208 transitions, 2180 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:09,002 INFO L231 Difference]: Finished difference. Result has 170 places, 181 transitions, 1719 flow [2024-06-14 11:37:09,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=170, PETRI_TRANSITIONS=181} [2024-06-14 11:37:09,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-14 11:37:09,003 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 181 transitions, 1719 flow [2024-06-14 11:37:09,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:09,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:09,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:09,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:37:09,004 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash 546483573, now seen corresponding path program 2 times [2024-06-14 11:37:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:09,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999190516] [2024-06-14 11:37:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:09,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999190516] [2024-06-14 11:37:09,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999190516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:09,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:09,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:09,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470664668] [2024-06-14 11:37:09,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:09,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:09,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:09,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 181 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:09,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:09,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:09,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:09,527 INFO L124 PetriNetUnfolderBase]: 1605/2868 cut-off events. [2024-06-14 11:37:09,528 INFO L125 PetriNetUnfolderBase]: For 86986/86986 co-relation queries the response was YES. [2024-06-14 11:37:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15751 conditions, 2868 events. 1605/2868 cut-off events. For 86986/86986 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18013 event pairs, 401 based on Foata normal form. 1/2866 useless extension candidates. Maximal degree in co-relation 15677. Up to 2459 conditions per place. [2024-06-14 11:37:09,549 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 169 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2024-06-14 11:37:09,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 216 transitions, 2354 flow [2024-06-14 11:37:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 11:37:09,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631313131313131 [2024-06-14 11:37:09,550 INFO L175 Difference]: Start difference. First operand has 170 places, 181 transitions, 1719 flow. Second operand 9 states and 223 transitions. [2024-06-14 11:37:09,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 216 transitions, 2354 flow [2024-06-14 11:37:09,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 216 transitions, 2224 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:09,673 INFO L231 Difference]: Finished difference. Result has 175 places, 187 transitions, 1738 flow [2024-06-14 11:37:09,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1738, PETRI_PLACES=175, PETRI_TRANSITIONS=187} [2024-06-14 11:37:09,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-14 11:37:09,674 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 187 transitions, 1738 flow [2024-06-14 11:37:09,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:09,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:09,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:09,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:37:09,677 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:09,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash 536957397, now seen corresponding path program 1 times [2024-06-14 11:37:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:09,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197169531] [2024-06-14 11:37:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:09,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197169531] [2024-06-14 11:37:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197169531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031700544] [2024-06-14 11:37:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:09,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:09,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:09,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 187 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:09,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:09,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:09,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:10,168 INFO L124 PetriNetUnfolderBase]: 1613/2880 cut-off events. [2024-06-14 11:37:10,169 INFO L125 PetriNetUnfolderBase]: For 91325/91325 co-relation queries the response was YES. [2024-06-14 11:37:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 2880 events. 1613/2880 cut-off events. For 91325/91325 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18020 event pairs, 320 based on Foata normal form. 2/2879 useless extension candidates. Maximal degree in co-relation 15799. Up to 2441 conditions per place. [2024-06-14 11:37:10,195 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 31 changer transitions 0/220 dead transitions. [2024-06-14 11:37:10,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 220 transitions, 2364 flow [2024-06-14 11:37:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 11:37:10,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 11:37:10,196 INFO L175 Difference]: Start difference. First operand has 175 places, 187 transitions, 1738 flow. Second operand 7 states and 183 transitions. [2024-06-14 11:37:10,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 220 transitions, 2364 flow [2024-06-14 11:37:10,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 220 transitions, 2282 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:10,360 INFO L231 Difference]: Finished difference. Result has 176 places, 191 transitions, 1775 flow [2024-06-14 11:37:10,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=176, PETRI_TRANSITIONS=191} [2024-06-14 11:37:10,360 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 11:37:10,360 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 191 transitions, 1775 flow [2024-06-14 11:37:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:10,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:10,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:37:10,361 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:10,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2080317593, now seen corresponding path program 2 times [2024-06-14 11:37:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607095735] [2024-06-14 11:37:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607095735] [2024-06-14 11:37:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607095735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:10,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094985349] [2024-06-14 11:37:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:10,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:10,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 191 transitions, 1775 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:10,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:10,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:10,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:10,909 INFO L124 PetriNetUnfolderBase]: 1621/2892 cut-off events. [2024-06-14 11:37:10,909 INFO L125 PetriNetUnfolderBase]: For 95578/95578 co-relation queries the response was YES. [2024-06-14 11:37:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16122 conditions, 2892 events. 1621/2892 cut-off events. For 95578/95578 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18146 event pairs, 399 based on Foata normal form. 2/2891 useless extension candidates. Maximal degree in co-relation 16047. Up to 2498 conditions per place. [2024-06-14 11:37:10,936 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 28 changer transitions 0/217 dead transitions. [2024-06-14 11:37:10,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 217 transitions, 2279 flow [2024-06-14 11:37:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:37:10,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 11:37:10,937 INFO L175 Difference]: Start difference. First operand has 176 places, 191 transitions, 1775 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:37:10,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 217 transitions, 2279 flow [2024-06-14 11:37:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 2209 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:11,103 INFO L231 Difference]: Finished difference. Result has 180 places, 193 transitions, 1798 flow [2024-06-14 11:37:11,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1798, PETRI_PLACES=180, PETRI_TRANSITIONS=193} [2024-06-14 11:37:11,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-14 11:37:11,104 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 193 transitions, 1798 flow [2024-06-14 11:37:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:11,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:11,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:11,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:37:11,105 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:11,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1940382663, now seen corresponding path program 3 times [2024-06-14 11:37:11,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:11,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140646211] [2024-06-14 11:37:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:11,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:11,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:11,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140646211] [2024-06-14 11:37:11,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140646211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:11,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698921073] [2024-06-14 11:37:11,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:11,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:11,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 193 transitions, 1798 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:11,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:11,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:11,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:11,638 INFO L124 PetriNetUnfolderBase]: 1634/2910 cut-off events. [2024-06-14 11:37:11,638 INFO L125 PetriNetUnfolderBase]: For 99506/99506 co-relation queries the response was YES. [2024-06-14 11:37:11,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 2910 events. 1634/2910 cut-off events. For 99506/99506 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18261 event pairs, 405 based on Foata normal form. 1/2905 useless extension candidates. Maximal degree in co-relation 16283. Up to 2411 conditions per place. [2024-06-14 11:37:11,662 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 148 selfloop transitions, 71 changer transitions 0/228 dead transitions. [2024-06-14 11:37:11,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 228 transitions, 2672 flow [2024-06-14 11:37:11,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 11:37:11,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2024-06-14 11:37:11,664 INFO L175 Difference]: Start difference. First operand has 180 places, 193 transitions, 1798 flow. Second operand 7 states and 186 transitions. [2024-06-14 11:37:11,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 228 transitions, 2672 flow [2024-06-14 11:37:11,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 228 transitions, 2609 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:11,787 INFO L231 Difference]: Finished difference. Result has 182 places, 202 transitions, 1997 flow [2024-06-14 11:37:11,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=182, PETRI_TRANSITIONS=202} [2024-06-14 11:37:11,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-14 11:37:11,788 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 202 transitions, 1997 flow [2024-06-14 11:37:11,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:11,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:11,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:37:11,789 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:11,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:11,789 INFO L85 PathProgramCache]: Analyzing trace with hash 832175477, now seen corresponding path program 4 times [2024-06-14 11:37:11,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:11,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140151941] [2024-06-14 11:37:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:11,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:11,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140151941] [2024-06-14 11:37:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140151941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:11,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85396872] [2024-06-14 11:37:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:11,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:11,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:11,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 202 transitions, 1997 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:11,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:11,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:11,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:12,265 INFO L124 PetriNetUnfolderBase]: 1639/2919 cut-off events. [2024-06-14 11:37:12,266 INFO L125 PetriNetUnfolderBase]: For 105291/105291 co-relation queries the response was YES. [2024-06-14 11:37:12,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16878 conditions, 2919 events. 1639/2919 cut-off events. For 105291/105291 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18404 event pairs, 405 based on Foata normal form. 1/2914 useless extension candidates. Maximal degree in co-relation 16800. Up to 2417 conditions per place. [2024-06-14 11:37:12,290 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 145 selfloop transitions, 73 changer transitions 0/227 dead transitions. [2024-06-14 11:37:12,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 227 transitions, 2709 flow [2024-06-14 11:37:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:37:12,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:37:12,292 INFO L175 Difference]: Start difference. First operand has 182 places, 202 transitions, 1997 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:37:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 227 transitions, 2709 flow [2024-06-14 11:37:12,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 227 transitions, 2565 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:12,448 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 2047 flow [2024-06-14 11:37:12,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2047, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2024-06-14 11:37:12,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 11:37:12,449 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 2047 flow [2024-06-14 11:37:12,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:12,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:12,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:12,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:37:12,450 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:12,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1004665367, now seen corresponding path program 5 times [2024-06-14 11:37:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:12,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245215501] [2024-06-14 11:37:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245215501] [2024-06-14 11:37:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245215501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:12,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:12,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444168227] [2024-06-14 11:37:12,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:12,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:12,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 2047 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:12,899 INFO L124 PetriNetUnfolderBase]: 1660/2954 cut-off events. [2024-06-14 11:37:12,899 INFO L125 PetriNetUnfolderBase]: For 109860/109860 co-relation queries the response was YES. [2024-06-14 11:37:12,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16938 conditions, 2954 events. 1660/2954 cut-off events. For 109860/109860 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18657 event pairs, 405 based on Foata normal form. 1/2949 useless extension candidates. Maximal degree in co-relation 16859. Up to 2441 conditions per place. [2024-06-14 11:37:12,973 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 143 selfloop transitions, 82 changer transitions 0/234 dead transitions. [2024-06-14 11:37:12,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 234 transitions, 2920 flow [2024-06-14 11:37:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:37:12,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 11:37:12,974 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 2047 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:37:12,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 234 transitions, 2920 flow [2024-06-14 11:37:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2786 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:13,236 INFO L231 Difference]: Finished difference. Result has 189 places, 214 transitions, 2182 flow [2024-06-14 11:37:13,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2182, PETRI_PLACES=189, PETRI_TRANSITIONS=214} [2024-06-14 11:37:13,237 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-14 11:37:13,237 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 214 transitions, 2182 flow [2024-06-14 11:37:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:13,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:37:13,238 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:13,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1356264075, now seen corresponding path program 6 times [2024-06-14 11:37:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823041056] [2024-06-14 11:37:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823041056] [2024-06-14 11:37:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823041056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:13,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:13,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970815650] [2024-06-14 11:37:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:13,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 214 transitions, 2182 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:13,735 INFO L124 PetriNetUnfolderBase]: 1657/2954 cut-off events. [2024-06-14 11:37:13,736 INFO L125 PetriNetUnfolderBase]: For 113062/113062 co-relation queries the response was YES. [2024-06-14 11:37:13,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16980 conditions, 2954 events. 1657/2954 cut-off events. For 113062/113062 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18649 event pairs, 399 based on Foata normal form. 1/2952 useless extension candidates. Maximal degree in co-relation 16900. Up to 2551 conditions per place. [2024-06-14 11:37:13,761 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2024-06-14 11:37:13,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 231 transitions, 2668 flow [2024-06-14 11:37:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:13,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:13,762 INFO L175 Difference]: Start difference. First operand has 189 places, 214 transitions, 2182 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:13,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 231 transitions, 2668 flow [2024-06-14 11:37:14,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 231 transitions, 2570 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:14,078 INFO L231 Difference]: Finished difference. Result has 194 places, 214 transitions, 2146 flow [2024-06-14 11:37:14,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=194, PETRI_TRANSITIONS=214} [2024-06-14 11:37:14,079 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 11:37:14,079 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 214 transitions, 2146 flow [2024-06-14 11:37:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:14,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:14,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:14,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:37:14,080 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:14,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 76603355, now seen corresponding path program 3 times [2024-06-14 11:37:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976270255] [2024-06-14 11:37:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976270255] [2024-06-14 11:37:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976270255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:14,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:14,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:14,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953244588] [2024-06-14 11:37:14,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:14,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:14,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 214 transitions, 2146 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:14,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:14,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:14,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:14,617 INFO L124 PetriNetUnfolderBase]: 1665/2966 cut-off events. [2024-06-14 11:37:14,617 INFO L125 PetriNetUnfolderBase]: For 118621/118621 co-relation queries the response was YES. [2024-06-14 11:37:14,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17015 conditions, 2966 events. 1665/2966 cut-off events. For 118621/118621 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18689 event pairs, 399 based on Foata normal form. 2/2965 useless extension candidates. Maximal degree in co-relation 16934. Up to 2560 conditions per place. [2024-06-14 11:37:14,644 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 198 selfloop transitions, 27 changer transitions 0/234 dead transitions. [2024-06-14 11:37:14,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 234 transitions, 2662 flow [2024-06-14 11:37:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:14,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:14,645 INFO L175 Difference]: Start difference. First operand has 194 places, 214 transitions, 2146 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:14,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 234 transitions, 2662 flow [2024-06-14 11:37:14,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 234 transitions, 2600 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:14,950 INFO L231 Difference]: Finished difference. Result has 196 places, 216 transitions, 2169 flow [2024-06-14 11:37:14,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=196, PETRI_TRANSITIONS=216} [2024-06-14 11:37:14,951 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-14 11:37:14,951 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 216 transitions, 2169 flow [2024-06-14 11:37:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:14,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:14,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:37:14,952 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:14,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 832004791, now seen corresponding path program 1 times [2024-06-14 11:37:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:14,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595905714] [2024-06-14 11:37:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:14,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:15,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:15,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595905714] [2024-06-14 11:37:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595905714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052957771] [2024-06-14 11:37:15,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:15,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:15,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:15,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:15,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:15,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 216 transitions, 2169 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:15,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:15,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:15,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:15,480 INFO L124 PetriNetUnfolderBase]: 1670/2970 cut-off events. [2024-06-14 11:37:15,481 INFO L125 PetriNetUnfolderBase]: For 121988/121988 co-relation queries the response was YES. [2024-06-14 11:37:15,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 2970 events. 1670/2970 cut-off events. For 121988/121988 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18754 event pairs, 405 based on Foata normal form. 1/2965 useless extension candidates. Maximal degree in co-relation 17087. Up to 2540 conditions per place. [2024-06-14 11:37:15,506 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-14 11:37:15,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 242 transitions, 2731 flow [2024-06-14 11:37:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:37:15,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 11:37:15,507 INFO L175 Difference]: Start difference. First operand has 196 places, 216 transitions, 2169 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:37:15,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 242 transitions, 2731 flow [2024-06-14 11:37:15,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 242 transitions, 2666 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:15,812 INFO L231 Difference]: Finished difference. Result has 198 places, 219 transitions, 2210 flow [2024-06-14 11:37:15,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2210, PETRI_PLACES=198, PETRI_TRANSITIONS=219} [2024-06-14 11:37:15,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-14 11:37:15,813 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 219 transitions, 2210 flow [2024-06-14 11:37:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:15,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:15,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:37:15,814 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:15,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1928947879, now seen corresponding path program 2 times [2024-06-14 11:37:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800494576] [2024-06-14 11:37:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800494576] [2024-06-14 11:37:16,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800494576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:16,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:16,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098887212] [2024-06-14 11:37:16,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:16,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:16,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:16,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:16,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 219 transitions, 2210 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:16,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:16,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:16,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:16,514 INFO L124 PetriNetUnfolderBase]: 1683/2989 cut-off events. [2024-06-14 11:37:16,514 INFO L125 PetriNetUnfolderBase]: For 128232/128232 co-relation queries the response was YES. [2024-06-14 11:37:16,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 2989 events. 1683/2989 cut-off events. For 128232/128232 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18902 event pairs, 411 based on Foata normal form. 1/2981 useless extension candidates. Maximal degree in co-relation 17612. Up to 2489 conditions per place. [2024-06-14 11:37:16,546 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 187 selfloop transitions, 61 changer transitions 0/257 dead transitions. [2024-06-14 11:37:16,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 257 transitions, 3134 flow [2024-06-14 11:37:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 11:37:16,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 11:37:16,547 INFO L175 Difference]: Start difference. First operand has 198 places, 219 transitions, 2210 flow. Second operand 7 states and 183 transitions. [2024-06-14 11:37:16,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 257 transitions, 3134 flow [2024-06-14 11:37:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 257 transitions, 3050 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:16,940 INFO L231 Difference]: Finished difference. Result has 201 places, 235 transitions, 2464 flow [2024-06-14 11:37:16,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2464, PETRI_PLACES=201, PETRI_TRANSITIONS=235} [2024-06-14 11:37:16,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 11:37:16,941 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 235 transitions, 2464 flow [2024-06-14 11:37:16,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:16,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:16,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:37:16,942 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1928940935, now seen corresponding path program 1 times [2024-06-14 11:37:16,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745842237] [2024-06-14 11:37:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:17,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745842237] [2024-06-14 11:37:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745842237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:17,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:17,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:17,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267438552] [2024-06-14 11:37:17,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:17,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:17,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:17,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 235 transitions, 2464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:17,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:17,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:17,459 INFO L124 PetriNetUnfolderBase]: 1696/3013 cut-off events. [2024-06-14 11:37:17,460 INFO L125 PetriNetUnfolderBase]: For 135812/135812 co-relation queries the response was YES. [2024-06-14 11:37:17,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18310 conditions, 3013 events. 1696/3013 cut-off events. For 135812/135812 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19081 event pairs, 406 based on Foata normal form. 1/3006 useless extension candidates. Maximal degree in co-relation 18225. Up to 2535 conditions per place. [2024-06-14 11:37:17,487 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 207 selfloop transitions, 56 changer transitions 0/272 dead transitions. [2024-06-14 11:37:17,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 272 transitions, 3398 flow [2024-06-14 11:37:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:37:17,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:37:17,489 INFO L175 Difference]: Start difference. First operand has 201 places, 235 transitions, 2464 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:37:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 272 transitions, 3398 flow [2024-06-14 11:37:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 272 transitions, 3342 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 11:37:17,780 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 2725 flow [2024-06-14 11:37:17,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2725, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2024-06-14 11:37:17,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-14 11:37:17,781 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 2725 flow [2024-06-14 11:37:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:17,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:17,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:37:17,782 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:17,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1351495531, now seen corresponding path program 3 times [2024-06-14 11:37:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:17,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034058552] [2024-06-14 11:37:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034058552] [2024-06-14 11:37:17,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034058552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:17,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:17,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278106691] [2024-06-14 11:37:17,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:17,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:17,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:17,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 2725 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:17,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:17,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:17,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:18,302 INFO L124 PetriNetUnfolderBase]: 1709/3033 cut-off events. [2024-06-14 11:37:18,302 INFO L125 PetriNetUnfolderBase]: For 143483/143483 co-relation queries the response was YES. [2024-06-14 11:37:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 3033 events. 1709/3033 cut-off events. For 143483/143483 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19218 event pairs, 410 based on Foata normal form. 1/3025 useless extension candidates. Maximal degree in co-relation 18878. Up to 2522 conditions per place. [2024-06-14 11:37:18,330 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 197 selfloop transitions, 69 changer transitions 0/275 dead transitions. [2024-06-14 11:37:18,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 275 transitions, 3603 flow [2024-06-14 11:37:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:37:18,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 11:37:18,331 INFO L175 Difference]: Start difference. First operand has 208 places, 250 transitions, 2725 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:37:18,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 275 transitions, 3603 flow [2024-06-14 11:37:18,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 3532 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:18,675 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2890 flow [2024-06-14 11:37:18,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2890, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-14 11:37:18,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-14 11:37:18,676 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2890 flow [2024-06-14 11:37:18,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:18,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:18,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:18,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:37:18,677 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:18,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1351488587, now seen corresponding path program 2 times [2024-06-14 11:37:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:18,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119181460] [2024-06-14 11:37:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:18,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:18,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:18,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119181460] [2024-06-14 11:37:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119181460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:18,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41839364] [2024-06-14 11:37:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:18,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:18,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:18,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2890 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:18,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:18,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:18,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:19,192 INFO L124 PetriNetUnfolderBase]: 1730/3070 cut-off events. [2024-06-14 11:37:19,192 INFO L125 PetriNetUnfolderBase]: For 151818/151818 co-relation queries the response was YES. [2024-06-14 11:37:19,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19509 conditions, 3070 events. 1730/3070 cut-off events. For 151818/151818 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19467 event pairs, 406 based on Foata normal form. 1/3063 useless extension candidates. Maximal degree in co-relation 19418. Up to 2577 conditions per place. [2024-06-14 11:37:19,222 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 213 selfloop transitions, 63 changer transitions 0/285 dead transitions. [2024-06-14 11:37:19,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 285 transitions, 3923 flow [2024-06-14 11:37:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:37:19,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 11:37:19,223 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2890 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:37:19,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 285 transitions, 3923 flow [2024-06-14 11:37:19,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 285 transitions, 3811 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:19,555 INFO L231 Difference]: Finished difference. Result has 217 places, 265 transitions, 3025 flow [2024-06-14 11:37:19,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3025, PETRI_PLACES=217, PETRI_TRANSITIONS=265} [2024-06-14 11:37:19,556 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 11:37:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 265 transitions, 3025 flow [2024-06-14 11:37:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:19,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:37:19,557 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:19,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1342917707, now seen corresponding path program 3 times [2024-06-14 11:37:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221564791] [2024-06-14 11:37:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221564791] [2024-06-14 11:37:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221564791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:19,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:19,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:19,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121567654] [2024-06-14 11:37:19,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:19,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:19,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:19,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:19,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 265 transitions, 3025 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:19,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:19,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:19,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:20,074 INFO L124 PetriNetUnfolderBase]: 1727/3066 cut-off events. [2024-06-14 11:37:20,075 INFO L125 PetriNetUnfolderBase]: For 155722/155722 co-relation queries the response was YES. [2024-06-14 11:37:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19512 conditions, 3066 events. 1727/3066 cut-off events. For 155722/155722 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19443 event pairs, 406 based on Foata normal form. 1/3059 useless extension candidates. Maximal degree in co-relation 19420. Up to 2574 conditions per place. [2024-06-14 11:37:20,102 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 65 changer transitions 0/284 dead transitions. [2024-06-14 11:37:20,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3837 flow [2024-06-14 11:37:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:37:20,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 11:37:20,103 INFO L175 Difference]: Start difference. First operand has 217 places, 265 transitions, 3025 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:37:20,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3837 flow [2024-06-14 11:37:20,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 284 transitions, 3727 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 11:37:20,492 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 3051 flow [2024-06-14 11:37:20,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3051, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-14 11:37:20,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-14 11:37:20,493 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 3051 flow [2024-06-14 11:37:20,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:20,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:20,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:20,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:37:20,493 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:20,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1342906795, now seen corresponding path program 1 times [2024-06-14 11:37:20,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:20,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768754646] [2024-06-14 11:37:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:20,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:20,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:20,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768754646] [2024-06-14 11:37:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768754646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:20,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:20,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597253479] [2024-06-14 11:37:20,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:20,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:20,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:20,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 3051 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:20,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:20,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:20,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:21,047 INFO L124 PetriNetUnfolderBase]: 1668/3002 cut-off events. [2024-06-14 11:37:21,047 INFO L125 PetriNetUnfolderBase]: For 175267/175267 co-relation queries the response was YES. [2024-06-14 11:37:21,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 3002 events. 1668/3002 cut-off events. For 175267/175267 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19287 event pairs, 382 based on Foata normal form. 10/2987 useless extension candidates. Maximal degree in co-relation 19311. Up to 2415 conditions per place. [2024-06-14 11:37:21,081 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 207 selfloop transitions, 40 changer transitions 0/287 dead transitions. [2024-06-14 11:37:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 3637 flow [2024-06-14 11:37:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:37:21,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 11:37:21,083 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 3051 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:37:21,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 3637 flow [2024-06-14 11:37:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 287 transitions, 3502 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:21,501 INFO L231 Difference]: Finished difference. Result has 224 places, 266 transitions, 3022 flow [2024-06-14 11:37:21,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3022, PETRI_PLACES=224, PETRI_TRANSITIONS=266} [2024-06-14 11:37:21,501 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-14 11:37:21,501 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 266 transitions, 3022 flow [2024-06-14 11:37:21,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:21,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:21,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:37:21,502 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:21,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:21,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1738681897, now seen corresponding path program 7 times [2024-06-14 11:37:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:21,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791390382] [2024-06-14 11:37:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:21,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:21,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:21,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791390382] [2024-06-14 11:37:21,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791390382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:21,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:21,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:21,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074052724] [2024-06-14 11:37:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:21,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 266 transitions, 3022 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:21,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:21,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:22,023 INFO L124 PetriNetUnfolderBase]: 1768/3125 cut-off events. [2024-06-14 11:37:22,023 INFO L125 PetriNetUnfolderBase]: For 167475/167475 co-relation queries the response was YES. [2024-06-14 11:37:22,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20071 conditions, 3125 events. 1768/3125 cut-off events. For 167475/167475 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19911 event pairs, 420 based on Foata normal form. 1/3115 useless extension candidates. Maximal degree in co-relation 19977. Up to 2598 conditions per place. [2024-06-14 11:37:22,051 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 196 selfloop transitions, 86 changer transitions 0/291 dead transitions. [2024-06-14 11:37:22,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 3901 flow [2024-06-14 11:37:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:37:22,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:37:22,052 INFO L175 Difference]: Start difference. First operand has 224 places, 266 transitions, 3022 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:37:22,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 3901 flow [2024-06-14 11:37:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 291 transitions, 3817 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:22,405 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 3153 flow [2024-06-14 11:37:22,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-14 11:37:22,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 11:37:22,405 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 3153 flow [2024-06-14 11:37:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:22,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:22,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:22,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:37:22,406 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:22,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash 311620363, now seen corresponding path program 8 times [2024-06-14 11:37:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:22,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748026520] [2024-06-14 11:37:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:22,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:22,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748026520] [2024-06-14 11:37:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748026520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:22,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:22,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142562325] [2024-06-14 11:37:22,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:22,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:22,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:22,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:22,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 3153 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:22,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:22,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:22,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:22,895 INFO L124 PetriNetUnfolderBase]: 1765/3121 cut-off events. [2024-06-14 11:37:22,896 INFO L125 PetriNetUnfolderBase]: For 171184/171184 co-relation queries the response was YES. [2024-06-14 11:37:22,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20129 conditions, 3121 events. 1765/3121 cut-off events. For 171184/171184 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19837 event pairs, 420 based on Foata normal form. 1/3111 useless extension candidates. Maximal degree in co-relation 20034. Up to 2595 conditions per place. [2024-06-14 11:37:22,923 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-14 11:37:22,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 288 transitions, 3985 flow [2024-06-14 11:37:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:37:22,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 11:37:22,925 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 3153 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:37:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 288 transitions, 3985 flow [2024-06-14 11:37:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 288 transitions, 3687 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:23,407 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 3029 flow [2024-06-14 11:37:23,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3029, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-14 11:37:23,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 11:37:23,407 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 3029 flow [2024-06-14 11:37:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:23,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:37:23,408 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -55861737, now seen corresponding path program 9 times [2024-06-14 11:37:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243159488] [2024-06-14 11:37:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:23,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243159488] [2024-06-14 11:37:23,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243159488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:23,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:23,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:23,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663875789] [2024-06-14 11:37:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:23,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:23,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:23,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:23,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:23,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:23,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 3029 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:23,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:23,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:23,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:23,929 INFO L124 PetriNetUnfolderBase]: 1770/3130 cut-off events. [2024-06-14 11:37:23,930 INFO L125 PetriNetUnfolderBase]: For 175868/175868 co-relation queries the response was YES. [2024-06-14 11:37:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20066 conditions, 3130 events. 1770/3130 cut-off events. For 175868/175868 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19929 event pairs, 420 based on Foata normal form. 1/3120 useless extension candidates. Maximal degree in co-relation 19972. Up to 2601 conditions per place. [2024-06-14 11:37:23,958 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 89 changer transitions 0/287 dead transitions. [2024-06-14 11:37:23,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 287 transitions, 3766 flow [2024-06-14 11:37:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:37:23,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:37:23,960 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 3029 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:37:23,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 287 transitions, 3766 flow [2024-06-14 11:37:24,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 287 transitions, 3580 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:24,271 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 3056 flow [2024-06-14 11:37:24,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3056, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-14 11:37:24,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 11:37:24,271 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 3056 flow [2024-06-14 11:37:24,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:24,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:24,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:24,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:37:24,272 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:24,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash -437667689, now seen corresponding path program 10 times [2024-06-14 11:37:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:24,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378045337] [2024-06-14 11:37:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:24,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378045337] [2024-06-14 11:37:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378045337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:24,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266352888] [2024-06-14 11:37:24,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:24,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:24,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:24,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 3056 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:24,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:24,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:24,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:24,781 INFO L124 PetriNetUnfolderBase]: 1767/3118 cut-off events. [2024-06-14 11:37:24,781 INFO L125 PetriNetUnfolderBase]: For 180109/180109 co-relation queries the response was YES. [2024-06-14 11:37:24,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20079 conditions, 3118 events. 1767/3118 cut-off events. For 180109/180109 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19908 event pairs, 438 based on Foata normal form. 1/3105 useless extension candidates. Maximal degree in co-relation 19984. Up to 2598 conditions per place. [2024-06-14 11:37:24,810 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 89 changer transitions 0/284 dead transitions. [2024-06-14 11:37:24,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 284 transitions, 3752 flow [2024-06-14 11:37:24,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:37:24,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 11:37:24,811 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 3056 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:37:24,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 284 transitions, 3752 flow [2024-06-14 11:37:25,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 284 transitions, 3616 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:25,137 INFO L231 Difference]: Finished difference. Result has 231 places, 272 transitions, 3104 flow [2024-06-14 11:37:25,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2920, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3104, PETRI_PLACES=231, PETRI_TRANSITIONS=272} [2024-06-14 11:37:25,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 11:37:25,138 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 272 transitions, 3104 flow [2024-06-14 11:37:25,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:25,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:25,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:25,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:37:25,139 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:25,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2097489269, now seen corresponding path program 11 times [2024-06-14 11:37:25,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:25,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311457656] [2024-06-14 11:37:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:25,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311457656] [2024-06-14 11:37:25,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311457656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:25,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:25,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522549828] [2024-06-14 11:37:25,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:25,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:25,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 272 transitions, 3104 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:25,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:25,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:25,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:25,702 INFO L124 PetriNetUnfolderBase]: 1764/3114 cut-off events. [2024-06-14 11:37:25,702 INFO L125 PetriNetUnfolderBase]: For 184289/184289 co-relation queries the response was YES. [2024-06-14 11:37:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20108 conditions, 3114 events. 1764/3114 cut-off events. For 184289/184289 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19826 event pairs, 438 based on Foata normal form. 1/3101 useless extension candidates. Maximal degree in co-relation 20012. Up to 2595 conditions per place. [2024-06-14 11:37:25,733 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 188 selfloop transitions, 87 changer transitions 0/284 dead transitions. [2024-06-14 11:37:25,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 284 transitions, 3802 flow [2024-06-14 11:37:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:25,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:25,735 INFO L175 Difference]: Start difference. First operand has 231 places, 272 transitions, 3104 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:25,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 284 transitions, 3802 flow [2024-06-14 11:37:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 284 transitions, 3580 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:26,156 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 3062 flow [2024-06-14 11:37:26,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-14 11:37:26,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 11:37:26,157 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 3062 flow [2024-06-14 11:37:26,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:26,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:26,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:37:26,158 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:26,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2092727669, now seen corresponding path program 12 times [2024-06-14 11:37:26,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:26,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428739871] [2024-06-14 11:37:26,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:26,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428739871] [2024-06-14 11:37:26,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428739871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:26,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:26,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897469468] [2024-06-14 11:37:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:26,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:26,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 3062 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:26,667 INFO L124 PetriNetUnfolderBase]: 1761/3121 cut-off events. [2024-06-14 11:37:26,667 INFO L125 PetriNetUnfolderBase]: For 186696/186696 co-relation queries the response was YES. [2024-06-14 11:37:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20073 conditions, 3121 events. 1761/3121 cut-off events. For 186696/186696 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19909 event pairs, 414 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 19977. Up to 2703 conditions per place. [2024-06-14 11:37:26,695 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 246 selfloop transitions, 28 changer transitions 0/283 dead transitions. [2024-06-14 11:37:26,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 283 transitions, 3636 flow [2024-06-14 11:37:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:37:26,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:37:26,696 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 3062 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:37:26,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 283 transitions, 3636 flow [2024-06-14 11:37:27,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 283 transitions, 3366 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:27,127 INFO L231 Difference]: Finished difference. Result has 232 places, 272 transitions, 2854 flow [2024-06-14 11:37:27,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2854, PETRI_PLACES=232, PETRI_TRANSITIONS=272} [2024-06-14 11:37:27,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 11:37:27,128 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 272 transitions, 2854 flow [2024-06-14 11:37:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:27,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:27,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:27,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:37:27,128 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:27,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2092724693, now seen corresponding path program 4 times [2024-06-14 11:37:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096236785] [2024-06-14 11:37:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:27,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:27,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096236785] [2024-06-14 11:37:27,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096236785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:27,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:27,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215954384] [2024-06-14 11:37:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:27,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 272 transitions, 2854 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:27,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:27,717 INFO L124 PetriNetUnfolderBase]: 1756/3114 cut-off events. [2024-06-14 11:37:27,717 INFO L125 PetriNetUnfolderBase]: For 189166/189166 co-relation queries the response was YES. [2024-06-14 11:37:27,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 3114 events. 1756/3114 cut-off events. For 189166/189166 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19848 event pairs, 413 based on Foata normal form. 2/3108 useless extension candidates. Maximal degree in co-relation 19728. Up to 2693 conditions per place. [2024-06-14 11:37:27,745 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 248 selfloop transitions, 27 changer transitions 0/284 dead transitions. [2024-06-14 11:37:27,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 284 transitions, 3432 flow [2024-06-14 11:37:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:37:27,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:37:27,746 INFO L175 Difference]: Start difference. First operand has 232 places, 272 transitions, 2854 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:37:27,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 284 transitions, 3432 flow [2024-06-14 11:37:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 284 transitions, 3318 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:37:28,380 INFO L231 Difference]: Finished difference. Result has 231 places, 272 transitions, 2799 flow [2024-06-14 11:37:28,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=231, PETRI_TRANSITIONS=272} [2024-06-14 11:37:28,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 11:37:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 272 transitions, 2799 flow [2024-06-14 11:37:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:28,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:28,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:28,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:37:28,381 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:28,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 306865707, now seen corresponding path program 4 times [2024-06-14 11:37:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398031132] [2024-06-14 11:37:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398031132] [2024-06-14 11:37:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398031132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:28,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:28,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:28,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572637066] [2024-06-14 11:37:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:28,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:28,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 272 transitions, 2799 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:28,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:28,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:28,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:28,943 INFO L124 PetriNetUnfolderBase]: 1761/3128 cut-off events. [2024-06-14 11:37:28,943 INFO L125 PetriNetUnfolderBase]: For 192499/192499 co-relation queries the response was YES. [2024-06-14 11:37:28,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19937 conditions, 3128 events. 1761/3128 cut-off events. For 192499/192499 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19988 event pairs, 406 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 19839. Up to 2673 conditions per place. [2024-06-14 11:37:28,974 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 258 selfloop transitions, 28 changer transitions 0/295 dead transitions. [2024-06-14 11:37:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 295 transitions, 3466 flow [2024-06-14 11:37:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:37:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:37:28,975 INFO L175 Difference]: Start difference. First operand has 231 places, 272 transitions, 2799 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:37:28,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 295 transitions, 3466 flow [2024-06-14 11:37:29,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 295 transitions, 3393 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:29,653 INFO L231 Difference]: Finished difference. Result has 232 places, 275 transitions, 2839 flow [2024-06-14 11:37:29,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2839, PETRI_PLACES=232, PETRI_TRANSITIONS=275} [2024-06-14 11:37:29,654 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 11:37:29,654 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 275 transitions, 2839 flow [2024-06-14 11:37:29,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:29,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:29,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:29,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:37:29,655 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:29,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 311627307, now seen corresponding path program 5 times [2024-06-14 11:37:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567465749] [2024-06-14 11:37:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:29,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:29,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:29,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567465749] [2024-06-14 11:37:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567465749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:29,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:29,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:29,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229090700] [2024-06-14 11:37:29,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:29,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:29,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:29,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 275 transitions, 2839 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:29,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:29,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:29,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:30,236 INFO L124 PetriNetUnfolderBase]: 1766/3135 cut-off events. [2024-06-14 11:37:30,236 INFO L125 PetriNetUnfolderBase]: For 198472/198472 co-relation queries the response was YES. [2024-06-14 11:37:30,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20096 conditions, 3135 events. 1766/3135 cut-off events. For 198472/198472 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20019 event pairs, 409 based on Foata normal form. 1/3129 useless extension candidates. Maximal degree in co-relation 19997. Up to 2606 conditions per place. [2024-06-14 11:37:30,264 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 215 selfloop transitions, 74 changer transitions 0/298 dead transitions. [2024-06-14 11:37:30,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 298 transitions, 3900 flow [2024-06-14 11:37:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:37:30,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 11:37:30,266 INFO L175 Difference]: Start difference. First operand has 232 places, 275 transitions, 2839 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:37:30,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 298 transitions, 3900 flow [2024-06-14 11:37:30,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 3818 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:30,636 INFO L231 Difference]: Finished difference. Result has 234 places, 278 transitions, 2962 flow [2024-06-14 11:37:30,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2962, PETRI_PLACES=234, PETRI_TRANSITIONS=278} [2024-06-14 11:37:30,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 11:37:30,636 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 278 transitions, 2962 flow [2024-06-14 11:37:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:30,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:30,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:30,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:37:30,637 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:30,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1513361993, now seen corresponding path program 6 times [2024-06-14 11:37:30,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:30,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207882079] [2024-06-14 11:37:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:30,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207882079] [2024-06-14 11:37:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207882079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:30,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316794916] [2024-06-14 11:37:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:30,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:30,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 278 transitions, 2962 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:30,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:30,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:30,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:31,223 INFO L124 PetriNetUnfolderBase]: 1771/3146 cut-off events. [2024-06-14 11:37:31,223 INFO L125 PetriNetUnfolderBase]: For 204546/204546 co-relation queries the response was YES. [2024-06-14 11:37:31,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20331 conditions, 3146 events. 1771/3146 cut-off events. For 204546/204546 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20129 event pairs, 406 based on Foata normal form. 1/3142 useless extension candidates. Maximal degree in co-relation 20231. Up to 2674 conditions per place. [2024-06-14 11:37:31,266 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 255 selfloop transitions, 41 changer transitions 0/305 dead transitions. [2024-06-14 11:37:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 305 transitions, 3812 flow [2024-06-14 11:37:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 11:37:31,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-14 11:37:31,268 INFO L175 Difference]: Start difference. First operand has 234 places, 278 transitions, 2962 flow. Second operand 9 states and 217 transitions. [2024-06-14 11:37:31,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 305 transitions, 3812 flow [2024-06-14 11:37:31,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 3591 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:31,962 INFO L231 Difference]: Finished difference. Result has 241 places, 282 transitions, 2925 flow [2024-06-14 11:37:31,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2925, PETRI_PLACES=241, PETRI_TRANSITIONS=282} [2024-06-14 11:37:31,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-14 11:37:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 282 transitions, 2925 flow [2024-06-14 11:37:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:37:31,964 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1972809161, now seen corresponding path program 7 times [2024-06-14 11:37:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362067960] [2024-06-14 11:37:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362067960] [2024-06-14 11:37:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362067960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:32,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947390485] [2024-06-14 11:37:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:32,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:32,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 282 transitions, 2925 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:32,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:32,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:32,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:32,622 INFO L124 PetriNetUnfolderBase]: 1768/3142 cut-off events. [2024-06-14 11:37:32,622 INFO L125 PetriNetUnfolderBase]: For 207574/207574 co-relation queries the response was YES. [2024-06-14 11:37:32,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20211 conditions, 3142 events. 1768/3142 cut-off events. For 207574/207574 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20083 event pairs, 406 based on Foata normal form. 1/3138 useless extension candidates. Maximal degree in co-relation 20108. Up to 2671 conditions per place. [2024-06-14 11:37:32,654 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 250 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-14 11:37:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 299 transitions, 3547 flow [2024-06-14 11:37:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:32,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:32,655 INFO L175 Difference]: Start difference. First operand has 241 places, 282 transitions, 2925 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:32,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 299 transitions, 3547 flow [2024-06-14 11:37:33,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 299 transitions, 3425 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:33,246 INFO L231 Difference]: Finished difference. Result has 242 places, 282 transitions, 2889 flow [2024-06-14 11:37:33,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2889, PETRI_PLACES=242, PETRI_TRANSITIONS=282} [2024-06-14 11:37:33,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 11:37:33,247 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 282 transitions, 2889 flow [2024-06-14 11:37:33,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:33,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:33,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:37:33,248 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:33,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1802106731, now seen corresponding path program 8 times [2024-06-14 11:37:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540022365] [2024-06-14 11:37:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:33,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540022365] [2024-06-14 11:37:33,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540022365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:33,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:33,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:33,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276146611] [2024-06-14 11:37:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:33,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:33,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:33,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 282 transitions, 2889 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:33,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:33,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:33,789 INFO L124 PetriNetUnfolderBase]: 1781/3162 cut-off events. [2024-06-14 11:37:33,789 INFO L125 PetriNetUnfolderBase]: For 215918/215918 co-relation queries the response was YES. [2024-06-14 11:37:33,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20471 conditions, 3162 events. 1781/3162 cut-off events. For 215918/215918 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20240 event pairs, 409 based on Foata normal form. 1/3156 useless extension candidates. Maximal degree in co-relation 20367. Up to 2624 conditions per place. [2024-06-14 11:37:33,821 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 86 changer transitions 0/305 dead transitions. [2024-06-14 11:37:33,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 305 transitions, 3905 flow [2024-06-14 11:37:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:37:33,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:37:33,822 INFO L175 Difference]: Start difference. First operand has 242 places, 282 transitions, 2889 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:37:33,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 305 transitions, 3905 flow [2024-06-14 11:37:34,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 305 transitions, 3825 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:34,573 INFO L231 Difference]: Finished difference. Result has 243 places, 289 transitions, 3105 flow [2024-06-14 11:37:34,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3105, PETRI_PLACES=243, PETRI_TRANSITIONS=289} [2024-06-14 11:37:34,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 11:37:34,574 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 289 transitions, 3105 flow [2024-06-14 11:37:34,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:34,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:34,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:37:34,575 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:34,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1810677611, now seen corresponding path program 9 times [2024-06-14 11:37:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438716592] [2024-06-14 11:37:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:34,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:34,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438716592] [2024-06-14 11:37:34,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438716592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:34,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:34,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373376459] [2024-06-14 11:37:34,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:34,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:34,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:34,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:34,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 289 transitions, 3105 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:34,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:34,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:35,168 INFO L124 PetriNetUnfolderBase]: 1778/3158 cut-off events. [2024-06-14 11:37:35,168 INFO L125 PetriNetUnfolderBase]: For 219899/219899 co-relation queries the response was YES. [2024-06-14 11:37:35,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20557 conditions, 3158 events. 1778/3158 cut-off events. For 219899/219899 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20216 event pairs, 409 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 20452. Up to 2621 conditions per place. [2024-06-14 11:37:35,261 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 210 selfloop transitions, 85 changer transitions 0/304 dead transitions. [2024-06-14 11:37:35,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 304 transitions, 3867 flow [2024-06-14 11:37:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:37:35,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:37:35,262 INFO L175 Difference]: Start difference. First operand has 243 places, 289 transitions, 3105 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:37:35,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 304 transitions, 3867 flow [2024-06-14 11:37:35,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 304 transitions, 3648 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:35,713 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 3062 flow [2024-06-14 11:37:35,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3062, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-14 11:37:35,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-14 11:37:35,714 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 3062 flow [2024-06-14 11:37:35,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:35,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:35,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:37:35,715 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:35,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1738282059, now seen corresponding path program 4 times [2024-06-14 11:37:35,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:35,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156451421] [2024-06-14 11:37:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:35,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:35,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156451421] [2024-06-14 11:37:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156451421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:35,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:35,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:35,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078533264] [2024-06-14 11:37:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:35,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:35,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:35,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 3062 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:35,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:35,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:35,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:36,345 INFO L124 PetriNetUnfolderBase]: 1775/3152 cut-off events. [2024-06-14 11:37:36,346 INFO L125 PetriNetUnfolderBase]: For 223624/223624 co-relation queries the response was YES. [2024-06-14 11:37:36,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20463 conditions, 3152 events. 1775/3152 cut-off events. For 223624/223624 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20181 event pairs, 413 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 20359. Up to 2649 conditions per place. [2024-06-14 11:37:36,382 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 234 selfloop transitions, 67 changer transitions 0/310 dead transitions. [2024-06-14 11:37:36,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 310 transitions, 4025 flow [2024-06-14 11:37:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:37:36,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 11:37:36,383 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 3062 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:37:36,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 310 transitions, 4025 flow [2024-06-14 11:37:36,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 310 transitions, 3869 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:36,903 INFO L231 Difference]: Finished difference. Result has 248 places, 291 transitions, 3085 flow [2024-06-14 11:37:36,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=248, PETRI_TRANSITIONS=291} [2024-06-14 11:37:36,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 11:37:36,904 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 291 transitions, 3085 flow [2024-06-14 11:37:36,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:36,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:36,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:36,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:37:36,904 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:36,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1810670667, now seen corresponding path program 5 times [2024-06-14 11:37:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271584619] [2024-06-14 11:37:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:37,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271584619] [2024-06-14 11:37:37,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271584619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:37,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945822100] [2024-06-14 11:37:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:37,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:37,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:37,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 291 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:37,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:37,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:37,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:37,532 INFO L124 PetriNetUnfolderBase]: 1788/3174 cut-off events. [2024-06-14 11:37:37,532 INFO L125 PetriNetUnfolderBase]: For 232186/232186 co-relation queries the response was YES. [2024-06-14 11:37:37,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20730 conditions, 3174 events. 1788/3174 cut-off events. For 232186/232186 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20352 event pairs, 413 based on Foata normal form. 1/3166 useless extension candidates. Maximal degree in co-relation 20625. Up to 2664 conditions per place. [2024-06-14 11:37:37,566 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-06-14 11:37:37,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 313 transitions, 4115 flow [2024-06-14 11:37:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:37:37,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 11:37:37,568 INFO L175 Difference]: Start difference. First operand has 248 places, 291 transitions, 3085 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:37:37,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 313 transitions, 4115 flow [2024-06-14 11:37:38,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 313 transitions, 3995 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:38,294 INFO L231 Difference]: Finished difference. Result has 252 places, 297 transitions, 3219 flow [2024-06-14 11:37:38,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3219, PETRI_PLACES=252, PETRI_TRANSITIONS=297} [2024-06-14 11:37:38,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 11:37:38,295 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 297 transitions, 3219 flow [2024-06-14 11:37:38,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:38,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:38,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:38,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:37:38,296 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:38,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1795433547, now seen corresponding path program 6 times [2024-06-14 11:37:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:38,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763399092] [2024-06-14 11:37:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:38,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763399092] [2024-06-14 11:37:38,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763399092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:38,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983763118] [2024-06-14 11:37:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:38,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:38,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 297 transitions, 3219 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:38,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:38,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:38,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:38,989 INFO L124 PetriNetUnfolderBase]: 1785/3177 cut-off events. [2024-06-14 11:37:38,989 INFO L125 PetriNetUnfolderBase]: For 235872/235872 co-relation queries the response was YES. [2024-06-14 11:37:39,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20711 conditions, 3177 events. 1785/3177 cut-off events. For 235872/235872 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20390 event pairs, 401 based on Foata normal form. 1/3174 useless extension candidates. Maximal degree in co-relation 20604. Up to 2756 conditions per place. [2024-06-14 11:37:39,025 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 25 changer transitions 0/311 dead transitions. [2024-06-14 11:37:39,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 311 transitions, 3857 flow [2024-06-14 11:37:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:37:39,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 11:37:39,026 INFO L175 Difference]: Start difference. First operand has 252 places, 297 transitions, 3219 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:37:39,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 311 transitions, 3857 flow [2024-06-14 11:37:39,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 311 transitions, 3719 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:39,884 INFO L231 Difference]: Finished difference. Result has 256 places, 297 transitions, 3137 flow [2024-06-14 11:37:39,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3137, PETRI_PLACES=256, PETRI_TRANSITIONS=297} [2024-06-14 11:37:39,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 11:37:39,885 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 297 transitions, 3137 flow [2024-06-14 11:37:39,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:39,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:39,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:37:39,885 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:39,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -437660745, now seen corresponding path program 10 times [2024-06-14 11:37:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523654707] [2024-06-14 11:37:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:39,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:39,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523654707] [2024-06-14 11:37:39,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523654707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:39,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:39,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516407791] [2024-06-14 11:37:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:39,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:40,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:40,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 297 transitions, 3137 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:40,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:40,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:40,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:40,484 INFO L124 PetriNetUnfolderBase]: 1790/3170 cut-off events. [2024-06-14 11:37:40,485 INFO L125 PetriNetUnfolderBase]: For 242703/242703 co-relation queries the response was YES. [2024-06-14 11:37:40,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20714 conditions, 3170 events. 1790/3170 cut-off events. For 242703/242703 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20366 event pairs, 434 based on Foata normal form. 1/3158 useless extension candidates. Maximal degree in co-relation 20606. Up to 2637 conditions per place. [2024-06-14 11:37:40,521 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 217 selfloop transitions, 87 changer transitions 0/313 dead transitions. [2024-06-14 11:37:40,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 313 transitions, 4113 flow [2024-06-14 11:37:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:37:40,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 11:37:40,523 INFO L175 Difference]: Start difference. First operand has 256 places, 297 transitions, 3137 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:37:40,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 313 transitions, 4113 flow [2024-06-14 11:37:41,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 313 transitions, 4013 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:37:41,420 INFO L231 Difference]: Finished difference. Result has 256 places, 300 transitions, 3267 flow [2024-06-14 11:37:41,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=256, PETRI_TRANSITIONS=300} [2024-06-14 11:37:41,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 11:37:41,421 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 300 transitions, 3267 flow [2024-06-14 11:37:41,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:41,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:41,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:41,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:37:41,422 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash 515448281, now seen corresponding path program 11 times [2024-06-14 11:37:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173515256] [2024-06-14 11:37:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:41,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173515256] [2024-06-14 11:37:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173515256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:41,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:41,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:41,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926308766] [2024-06-14 11:37:41,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:41,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:41,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:41,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:41,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 300 transitions, 3267 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:41,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:41,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:41,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:42,038 INFO L124 PetriNetUnfolderBase]: 1787/3166 cut-off events. [2024-06-14 11:37:42,038 INFO L125 PetriNetUnfolderBase]: For 246611/246611 co-relation queries the response was YES. [2024-06-14 11:37:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20818 conditions, 3166 events. 1787/3166 cut-off events. For 246611/246611 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20343 event pairs, 434 based on Foata normal form. 1/3154 useless extension candidates. Maximal degree in co-relation 20709. Up to 2634 conditions per place. [2024-06-14 11:37:42,075 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 89 changer transitions 0/312 dead transitions. [2024-06-14 11:37:42,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 312 transitions, 4047 flow [2024-06-14 11:37:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:37:42,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 11:37:42,076 INFO L175 Difference]: Start difference. First operand has 256 places, 300 transitions, 3267 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:37:42,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 312 transitions, 4047 flow [2024-06-14 11:37:43,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 312 transitions, 3763 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:43,082 INFO L231 Difference]: Finished difference. Result has 258 places, 300 transitions, 3167 flow [2024-06-14 11:37:43,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3167, PETRI_PLACES=258, PETRI_TRANSITIONS=300} [2024-06-14 11:37:43,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-14 11:37:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 300 transitions, 3167 flow [2024-06-14 11:37:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:43,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:37:43,084 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -77610859, now seen corresponding path program 12 times [2024-06-14 11:37:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359879419] [2024-06-14 11:37:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359879419] [2024-06-14 11:37:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359879419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:43,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101606098] [2024-06-14 11:37:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:43,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:43,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 300 transitions, 3167 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:43,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:43,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:43,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:43,666 INFO L124 PetriNetUnfolderBase]: 1784/3162 cut-off events. [2024-06-14 11:37:43,667 INFO L125 PetriNetUnfolderBase]: For 248980/248980 co-relation queries the response was YES. [2024-06-14 11:37:43,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20722 conditions, 3162 events. 1784/3162 cut-off events. For 248980/248980 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20293 event pairs, 434 based on Foata normal form. 1/3150 useless extension candidates. Maximal degree in co-relation 20612. Up to 2631 conditions per place. [2024-06-14 11:37:43,698 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 213 selfloop transitions, 89 changer transitions 0/311 dead transitions. [2024-06-14 11:37:43,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 311 transitions, 3797 flow [2024-06-14 11:37:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:37:43,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-14 11:37:43,700 INFO L175 Difference]: Start difference. First operand has 258 places, 300 transitions, 3167 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:37:43,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 311 transitions, 3797 flow [2024-06-14 11:37:44,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 311 transitions, 3579 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:44,473 INFO L231 Difference]: Finished difference. Result has 259 places, 300 transitions, 3133 flow [2024-06-14 11:37:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3133, PETRI_PLACES=259, PETRI_TRANSITIONS=300} [2024-06-14 11:37:44,474 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 11:37:44,474 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 300 transitions, 3133 flow [2024-06-14 11:37:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:44,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:37:44,475 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:44,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -70937675, now seen corresponding path program 7 times [2024-06-14 11:37:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123299861] [2024-06-14 11:37:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123299861] [2024-06-14 11:37:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123299861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446333835] [2024-06-14 11:37:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:44,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:44,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 300 transitions, 3133 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:44,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:44,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:44,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:45,091 INFO L124 PetriNetUnfolderBase]: 1794/3195 cut-off events. [2024-06-14 11:37:45,091 INFO L125 PetriNetUnfolderBase]: For 254563/254563 co-relation queries the response was YES. [2024-06-14 11:37:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20885 conditions, 3195 events. 1794/3195 cut-off events. For 254563/254563 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20610 event pairs, 403 based on Foata normal form. 1/3192 useless extension candidates. Maximal degree in co-relation 20774. Up to 2768 conditions per place. [2024-06-14 11:37:45,123 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 280 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2024-06-14 11:37:45,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 317 transitions, 3856 flow [2024-06-14 11:37:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:37:45,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:37:45,125 INFO L175 Difference]: Start difference. First operand has 259 places, 300 transitions, 3133 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:37:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 317 transitions, 3856 flow [2024-06-14 11:37:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 317 transitions, 3680 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:45,732 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 3106 flow [2024-06-14 11:37:45,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3106, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2024-06-14 11:37:45,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-14 11:37:45,733 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 3106 flow [2024-06-14 11:37:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:45,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:45,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:37:45,734 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:45,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -86174795, now seen corresponding path program 8 times [2024-06-14 11:37:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:45,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888280455] [2024-06-14 11:37:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888280455] [2024-06-14 11:37:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888280455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:45,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399002512] [2024-06-14 11:37:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:45,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:45,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:45,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:45,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 3106 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:45,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:45,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:45,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:46,328 INFO L124 PetriNetUnfolderBase]: 1799/3195 cut-off events. [2024-06-14 11:37:46,328 INFO L125 PetriNetUnfolderBase]: For 261105/261105 co-relation queries the response was YES. [2024-06-14 11:37:46,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20889 conditions, 3195 events. 1799/3195 cut-off events. For 261105/261105 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20607 event pairs, 418 based on Foata normal form. 1/3187 useless extension candidates. Maximal degree in co-relation 20777. Up to 2676 conditions per place. [2024-06-14 11:37:46,362 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 81 changer transitions 0/322 dead transitions. [2024-06-14 11:37:46,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 322 transitions, 4122 flow [2024-06-14 11:37:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:46,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:46,363 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 3106 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:46,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 322 transitions, 4122 flow [2024-06-14 11:37:47,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 322 transitions, 4042 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:47,219 INFO L231 Difference]: Finished difference. Result has 264 places, 309 transitions, 3250 flow [2024-06-14 11:37:47,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=264, PETRI_TRANSITIONS=309} [2024-06-14 11:37:47,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-14 11:37:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 309 transitions, 3250 flow [2024-06-14 11:37:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:47,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:47,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:37:47,228 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:47,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1850741851, now seen corresponding path program 9 times [2024-06-14 11:37:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804223599] [2024-06-14 11:37:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:47,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:47,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804223599] [2024-06-14 11:37:47,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804223599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:47,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:47,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25334556] [2024-06-14 11:37:47,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:47,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:47,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:47,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 309 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:47,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:47,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:47,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:47,862 INFO L124 PetriNetUnfolderBase]: 1804/3204 cut-off events. [2024-06-14 11:37:47,863 INFO L125 PetriNetUnfolderBase]: For 268055/268055 co-relation queries the response was YES. [2024-06-14 11:37:47,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21129 conditions, 3204 events. 1804/3204 cut-off events. For 268055/268055 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20649 event pairs, 418 based on Foata normal form. 1/3196 useless extension candidates. Maximal degree in co-relation 21016. Up to 2682 conditions per place. [2024-06-14 11:37:47,898 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 232 selfloop transitions, 84 changer transitions 0/325 dead transitions. [2024-06-14 11:37:47,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 325 transitions, 4268 flow [2024-06-14 11:37:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:37:47,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 11:37:47,903 INFO L175 Difference]: Start difference. First operand has 264 places, 309 transitions, 3250 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:37:47,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 325 transitions, 4268 flow [2024-06-14 11:37:49,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 325 transitions, 4069 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:37:49,270 INFO L231 Difference]: Finished difference. Result has 267 places, 312 transitions, 3273 flow [2024-06-14 11:37:49,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3273, PETRI_PLACES=267, PETRI_TRANSITIONS=312} [2024-06-14 11:37:49,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-14 11:37:49,273 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 312 transitions, 3273 flow [2024-06-14 11:37:49,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:49,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:49,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:49,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:37:49,274 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:49,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash 325475735, now seen corresponding path program 10 times [2024-06-14 11:37:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:49,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572784867] [2024-06-14 11:37:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:49,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572784867] [2024-06-14 11:37:49,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572784867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:49,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:49,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744157548] [2024-06-14 11:37:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:49,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:49,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:49,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 312 transitions, 3273 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:49,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:49,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:49,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:49,831 INFO L124 PetriNetUnfolderBase]: 1809/3213 cut-off events. [2024-06-14 11:37:49,831 INFO L125 PetriNetUnfolderBase]: For 274193/274193 co-relation queries the response was YES. [2024-06-14 11:37:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21216 conditions, 3213 events. 1809/3213 cut-off events. For 274193/274193 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20737 event pairs, 418 based on Foata normal form. 1/3205 useless extension candidates. Maximal degree in co-relation 21102. Up to 2688 conditions per place. [2024-06-14 11:37:49,867 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 230 selfloop transitions, 89 changer transitions 0/328 dead transitions. [2024-06-14 11:37:49,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 328 transitions, 4155 flow [2024-06-14 11:37:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:37:49,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 11:37:49,869 INFO L175 Difference]: Start difference. First operand has 267 places, 312 transitions, 3273 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:37:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 328 transitions, 4155 flow [2024-06-14 11:37:50,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 328 transitions, 3893 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:50,731 INFO L231 Difference]: Finished difference. Result has 268 places, 316 transitions, 3255 flow [2024-06-14 11:37:50,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3255, PETRI_PLACES=268, PETRI_TRANSITIONS=316} [2024-06-14 11:37:50,731 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 11:37:50,731 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 316 transitions, 3255 flow [2024-06-14 11:37:50,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:50,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:50,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:50,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:37:50,732 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:50,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 988282105, now seen corresponding path program 11 times [2024-06-14 11:37:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:50,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057619632] [2024-06-14 11:37:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:50,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057619632] [2024-06-14 11:37:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057619632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:50,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804155067] [2024-06-14 11:37:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:50,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:50,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:50,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 316 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:50,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:50,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:50,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:51,450 INFO L124 PetriNetUnfolderBase]: 1806/3218 cut-off events. [2024-06-14 11:37:51,451 INFO L125 PetriNetUnfolderBase]: For 276821/276821 co-relation queries the response was YES. [2024-06-14 11:37:51,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 3218 events. 1806/3218 cut-off events. For 276821/276821 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20764 event pairs, 403 based on Foata normal form. 1/3215 useless extension candidates. Maximal degree in co-relation 21037. Up to 2772 conditions per place. [2024-06-14 11:37:51,487 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 280 selfloop transitions, 41 changer transitions 0/330 dead transitions. [2024-06-14 11:37:51,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 330 transitions, 4087 flow [2024-06-14 11:37:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 11:37:51,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-14 11:37:51,489 INFO L175 Difference]: Start difference. First operand has 268 places, 316 transitions, 3255 flow. Second operand 9 states and 208 transitions. [2024-06-14 11:37:51,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 330 transitions, 4087 flow [2024-06-14 11:37:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 330 transitions, 3921 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:37:52,414 INFO L231 Difference]: Finished difference. Result has 274 places, 316 transitions, 3177 flow [2024-06-14 11:37:52,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3177, PETRI_PLACES=274, PETRI_TRANSITIONS=316} [2024-06-14 11:37:52,414 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-14 11:37:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 316 transitions, 3177 flow [2024-06-14 11:37:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:52,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:37:52,415 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:52,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -430922827, now seen corresponding path program 12 times [2024-06-14 11:37:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148223579] [2024-06-14 11:37:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:52,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:52,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148223579] [2024-06-14 11:37:52,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148223579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:52,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:52,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:52,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513192296] [2024-06-14 11:37:52,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:52,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:52,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:52,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:37:52,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 316 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:52,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:52,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:37:52,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:53,007 INFO L124 PetriNetUnfolderBase]: 1803/3214 cut-off events. [2024-06-14 11:37:53,007 INFO L125 PetriNetUnfolderBase]: For 279983/279983 co-relation queries the response was YES. [2024-06-14 11:37:53,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21016 conditions, 3214 events. 1803/3214 cut-off events. For 279983/279983 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20743 event pairs, 403 based on Foata normal form. 1/3211 useless extension candidates. Maximal degree in co-relation 20900. Up to 2769 conditions per place. [2024-06-14 11:37:53,043 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 278 selfloop transitions, 40 changer transitions 0/327 dead transitions. [2024-06-14 11:37:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 327 transitions, 3839 flow [2024-06-14 11:37:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:37:53,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:37:53,044 INFO L175 Difference]: Start difference. First operand has 274 places, 316 transitions, 3177 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:37:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 327 transitions, 3839 flow [2024-06-14 11:37:53,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 327 transitions, 3643 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 11:37:53,713 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 3067 flow [2024-06-14 11:37:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3067, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-14 11:37:53,714 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-14 11:37:53,714 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 3067 flow [2024-06-14 11:37:53,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:53,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:53,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:37:53,715 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:53,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2106084949, now seen corresponding path program 2 times [2024-06-14 11:37:53,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:53,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840074982] [2024-06-14 11:37:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840074982] [2024-06-14 11:37:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840074982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:53,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555423011] [2024-06-14 11:37:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:53,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:53,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 3067 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:53,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:53,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:53,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:54,311 INFO L124 PetriNetUnfolderBase]: 1733/3119 cut-off events. [2024-06-14 11:37:54,311 INFO L125 PetriNetUnfolderBase]: For 315176/315176 co-relation queries the response was YES. [2024-06-14 11:37:54,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20652 conditions, 3119 events. 1733/3119 cut-off events. For 315176/315176 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20410 event pairs, 392 based on Foata normal form. 10/3096 useless extension candidates. Maximal degree in co-relation 20537. Up to 2496 conditions per place. [2024-06-14 11:37:54,345 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 238 selfloop transitions, 39 changer transitions 0/332 dead transitions. [2024-06-14 11:37:54,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 332 transitions, 3699 flow [2024-06-14 11:37:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:37:54,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:37:54,346 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 3067 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:37:54,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 332 transitions, 3699 flow [2024-06-14 11:37:55,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 332 transitions, 3619 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:55,178 INFO L231 Difference]: Finished difference. Result has 273 places, 317 transitions, 3093 flow [2024-06-14 11:37:55,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3093, PETRI_PLACES=273, PETRI_TRANSITIONS=317} [2024-06-14 11:37:55,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-14 11:37:55,178 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 317 transitions, 3093 flow [2024-06-14 11:37:55,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:55,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:55,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:37:55,179 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:55,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash -430911915, now seen corresponding path program 3 times [2024-06-14 11:37:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:55,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512939511] [2024-06-14 11:37:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:55,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512939511] [2024-06-14 11:37:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512939511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:55,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:55,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:55,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710942915] [2024-06-14 11:37:55,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:55,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:55,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:55,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:55,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 317 transitions, 3093 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:55,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:55,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:55,891 INFO L124 PetriNetUnfolderBase]: 1762/3188 cut-off events. [2024-06-14 11:37:55,892 INFO L125 PetriNetUnfolderBase]: For 323570/323570 co-relation queries the response was YES. [2024-06-14 11:37:55,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21191 conditions, 3188 events. 1762/3188 cut-off events. For 323570/323570 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20946 event pairs, 391 based on Foata normal form. 9/3169 useless extension candidates. Maximal degree in co-relation 21075. Up to 2582 conditions per place. [2024-06-14 11:37:55,941 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 262 selfloop transitions, 16 changer transitions 0/333 dead transitions. [2024-06-14 11:37:55,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 333 transitions, 3729 flow [2024-06-14 11:37:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:37:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:37:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:37:55,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-14 11:37:55,942 INFO L175 Difference]: Start difference. First operand has 273 places, 317 transitions, 3093 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:37:55,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 333 transitions, 3729 flow [2024-06-14 11:37:57,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 333 transitions, 3645 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:57,052 INFO L231 Difference]: Finished difference. Result has 275 places, 318 transitions, 3071 flow [2024-06-14 11:37:57,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=275, PETRI_TRANSITIONS=318} [2024-06-14 11:37:57,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-14 11:37:57,053 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 318 transitions, 3071 flow [2024-06-14 11:37:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:57,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:57,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:57,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:37:57,054 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:57,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -413770155, now seen corresponding path program 4 times [2024-06-14 11:37:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:57,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690701828] [2024-06-14 11:37:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:57,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:57,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690701828] [2024-06-14 11:37:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690701828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:57,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406242975] [2024-06-14 11:37:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:57,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:57,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 318 transitions, 3071 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:57,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:57,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:57,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:57,711 INFO L124 PetriNetUnfolderBase]: 1764/3200 cut-off events. [2024-06-14 11:37:57,711 INFO L125 PetriNetUnfolderBase]: For 310614/310614 co-relation queries the response was YES. [2024-06-14 11:37:57,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20886 conditions, 3200 events. 1764/3200 cut-off events. For 310614/310614 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21068 event pairs, 385 based on Foata normal form. 8/3183 useless extension candidates. Maximal degree in co-relation 20769. Up to 2560 conditions per place. [2024-06-14 11:37:57,745 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 264 selfloop transitions, 19 changer transitions 0/338 dead transitions. [2024-06-14 11:37:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 338 transitions, 3739 flow [2024-06-14 11:37:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:37:57,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 11:37:57,746 INFO L175 Difference]: Start difference. First operand has 275 places, 318 transitions, 3071 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:37:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 338 transitions, 3739 flow [2024-06-14 11:37:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 338 transitions, 3699 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:37:58,852 INFO L231 Difference]: Finished difference. Result has 278 places, 319 transitions, 3099 flow [2024-06-14 11:37:58,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3099, PETRI_PLACES=278, PETRI_TRANSITIONS=319} [2024-06-14 11:37:58,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 11:37:58,853 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 319 transitions, 3099 flow [2024-06-14 11:37:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:58,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:58,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:37:58,853 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:58,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:58,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2085883083, now seen corresponding path program 1 times [2024-06-14 11:37:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339605428] [2024-06-14 11:37:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:58,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:58,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339605428] [2024-06-14 11:37:58,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339605428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:58,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:58,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:37:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566357726] [2024-06-14 11:37:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:58,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:37:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:37:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:37:59,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:37:59,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 319 transitions, 3099 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:37:59,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:59,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:37:59,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:59,570 INFO L124 PetriNetUnfolderBase]: 1890/3403 cut-off events. [2024-06-14 11:37:59,570 INFO L125 PetriNetUnfolderBase]: For 357100/357100 co-relation queries the response was YES. [2024-06-14 11:37:59,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22884 conditions, 3403 events. 1890/3403 cut-off events. For 357100/357100 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22464 event pairs, 386 based on Foata normal form. 8/3406 useless extension candidates. Maximal degree in co-relation 22766. Up to 2728 conditions per place. [2024-06-14 11:37:59,609 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 276 selfloop transitions, 19 changer transitions 0/350 dead transitions. [2024-06-14 11:37:59,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 350 transitions, 4001 flow [2024-06-14 11:37:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:37:59,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:37:59,611 INFO L175 Difference]: Start difference. First operand has 278 places, 319 transitions, 3099 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:37:59,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 350 transitions, 4001 flow [2024-06-14 11:38:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 350 transitions, 3949 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:00,576 INFO L231 Difference]: Finished difference. Result has 280 places, 321 transitions, 3127 flow [2024-06-14 11:38:00,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3127, PETRI_PLACES=280, PETRI_TRANSITIONS=321} [2024-06-14 11:38:00,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-14 11:38:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 321 transitions, 3127 flow [2024-06-14 11:38:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:00,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:00,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:38:00,577 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:00,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1941324209, now seen corresponding path program 2 times [2024-06-14 11:38:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974313587] [2024-06-14 11:38:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:00,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974313587] [2024-06-14 11:38:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974313587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:00,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:00,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731600137] [2024-06-14 11:38:00,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:00,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:00,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:38:00,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 321 transitions, 3127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:00,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:00,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:38:00,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:01,255 INFO L124 PetriNetUnfolderBase]: 1868/3374 cut-off events. [2024-06-14 11:38:01,255 INFO L125 PetriNetUnfolderBase]: For 335514/335514 co-relation queries the response was YES. [2024-06-14 11:38:01,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21886 conditions, 3374 events. 1868/3374 cut-off events. For 335514/335514 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22325 event pairs, 401 based on Foata normal form. 9/3379 useless extension candidates. Maximal degree in co-relation 21767. Up to 2761 conditions per place. [2024-06-14 11:38:01,296 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 271 selfloop transitions, 16 changer transitions 0/342 dead transitions. [2024-06-14 11:38:01,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 342 transitions, 3779 flow [2024-06-14 11:38:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:38:01,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 11:38:01,297 INFO L175 Difference]: Start difference. First operand has 280 places, 321 transitions, 3127 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:38:01,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 342 transitions, 3779 flow [2024-06-14 11:38:02,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 342 transitions, 3749 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:02,015 INFO L231 Difference]: Finished difference. Result has 283 places, 321 transitions, 3135 flow [2024-06-14 11:38:02,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3135, PETRI_PLACES=283, PETRI_TRANSITIONS=321} [2024-06-14 11:38:02,016 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-14 11:38:02,016 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 321 transitions, 3135 flow [2024-06-14 11:38:02,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:02,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:02,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:38:02,016 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:02,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1802095819, now seen corresponding path program 3 times [2024-06-14 11:38:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:02,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285877645] [2024-06-14 11:38:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:02,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:02,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285877645] [2024-06-14 11:38:02,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285877645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:02,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:02,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:02,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39851381] [2024-06-14 11:38:02,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:02,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:38:02,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 321 transitions, 3135 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:02,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:02,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:38:02,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:02,675 INFO L124 PetriNetUnfolderBase]: 1902/3427 cut-off events. [2024-06-14 11:38:02,675 INFO L125 PetriNetUnfolderBase]: For 343827/343827 co-relation queries the response was YES. [2024-06-14 11:38:02,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22301 conditions, 3427 events. 1902/3427 cut-off events. For 343827/343827 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22689 event pairs, 410 based on Foata normal form. 10/3430 useless extension candidates. Maximal degree in co-relation 22180. Up to 2784 conditions per place. [2024-06-14 11:38:02,713 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 246 selfloop transitions, 39 changer transitions 0/340 dead transitions. [2024-06-14 11:38:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 340 transitions, 3795 flow [2024-06-14 11:38:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:38:02,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 11:38:02,714 INFO L175 Difference]: Start difference. First operand has 283 places, 321 transitions, 3135 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:38:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 340 transitions, 3795 flow [2024-06-14 11:38:03,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 340 transitions, 3758 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:03,546 INFO L231 Difference]: Finished difference. Result has 284 places, 322 transitions, 3204 flow [2024-06-14 11:38:03,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3204, PETRI_PLACES=284, PETRI_TRANSITIONS=322} [2024-06-14 11:38:03,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-14 11:38:03,547 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 322 transitions, 3204 flow [2024-06-14 11:38:03,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:03,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:03,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:03,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:38:03,548 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:03,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1795415691, now seen corresponding path program 1 times [2024-06-14 11:38:03,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:03,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16784461] [2024-06-14 11:38:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:03,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16784461] [2024-06-14 11:38:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16784461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:03,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:03,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:03,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000540719] [2024-06-14 11:38:03,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:03,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:03,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:03,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 322 transitions, 3204 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:03,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:03,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:03,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:04,203 INFO L124 PetriNetUnfolderBase]: 1985/3519 cut-off events. [2024-06-14 11:38:04,203 INFO L125 PetriNetUnfolderBase]: For 320528/320528 co-relation queries the response was YES. [2024-06-14 11:38:04,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22953 conditions, 3519 events. 1985/3519 cut-off events. For 320528/320528 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22959 event pairs, 429 based on Foata normal form. 2/3517 useless extension candidates. Maximal degree in co-relation 22831. Up to 3064 conditions per place. [2024-06-14 11:38:04,243 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 303 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-14 11:38:04,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 339 transitions, 3934 flow [2024-06-14 11:38:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:38:04,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 11:38:04,244 INFO L175 Difference]: Start difference. First operand has 284 places, 322 transitions, 3204 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:38:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 339 transitions, 3934 flow [2024-06-14 11:38:05,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 339 transitions, 3852 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:05,057 INFO L231 Difference]: Finished difference. Result has 286 places, 324 transitions, 3219 flow [2024-06-14 11:38:05,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3219, PETRI_PLACES=286, PETRI_TRANSITIONS=324} [2024-06-14 11:38:05,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-14 11:38:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 324 transitions, 3219 flow [2024-06-14 11:38:05,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:05,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:05,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:05,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:38:05,058 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:05,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -429078953, now seen corresponding path program 4 times [2024-06-14 11:38:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091425044] [2024-06-14 11:38:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:05,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:05,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091425044] [2024-06-14 11:38:05,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091425044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:05,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:05,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:05,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893224107] [2024-06-14 11:38:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:05,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 11:38:05,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 324 transitions, 3219 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:05,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:05,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 11:38:05,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:05,691 INFO L124 PetriNetUnfolderBase]: 1920/3456 cut-off events. [2024-06-14 11:38:05,692 INFO L125 PetriNetUnfolderBase]: For 344355/344355 co-relation queries the response was YES. [2024-06-14 11:38:05,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22427 conditions, 3456 events. 1920/3456 cut-off events. For 344355/344355 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22920 event pairs, 417 based on Foata normal form. 10/3458 useless extension candidates. Maximal degree in co-relation 22304. Up to 2816 conditions per place. [2024-06-14 11:38:05,731 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 245 selfloop transitions, 40 changer transitions 0/340 dead transitions. [2024-06-14 11:38:05,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 340 transitions, 3875 flow [2024-06-14 11:38:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:38:05,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:38:05,732 INFO L175 Difference]: Start difference. First operand has 286 places, 324 transitions, 3219 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:38:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 340 transitions, 3875 flow [2024-06-14 11:38:06,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 340 transitions, 3794 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:06,589 INFO L231 Difference]: Finished difference. Result has 288 places, 325 transitions, 3250 flow [2024-06-14 11:38:06,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=288, PETRI_TRANSITIONS=325} [2024-06-14 11:38:06,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 11:38:06,590 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 325 transitions, 3250 flow [2024-06-14 11:38:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:06,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:06,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:06,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:38:06,591 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:06,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash -70919819, now seen corresponding path program 2 times [2024-06-14 11:38:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847733962] [2024-06-14 11:38:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847733962] [2024-06-14 11:38:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847733962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:06,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896962793] [2024-06-14 11:38:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:06,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 325 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:06,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:06,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:06,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:07,304 INFO L124 PetriNetUnfolderBase]: 2003/3550 cut-off events. [2024-06-14 11:38:07,304 INFO L125 PetriNetUnfolderBase]: For 319307/319307 co-relation queries the response was YES. [2024-06-14 11:38:07,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 3550 events. 2003/3550 cut-off events. For 319307/319307 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23163 event pairs, 435 based on Foata normal form. 2/3548 useless extension candidates. Maximal degree in co-relation 22900. Up to 3094 conditions per place. [2024-06-14 11:38:07,341 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 303 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-14 11:38:07,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 339 transitions, 3978 flow [2024-06-14 11:38:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:38:07,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:38:07,342 INFO L175 Difference]: Start difference. First operand has 288 places, 325 transitions, 3250 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:38:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 339 transitions, 3978 flow [2024-06-14 11:38:08,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 339 transitions, 3890 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:08,343 INFO L231 Difference]: Finished difference. Result has 290 places, 327 transitions, 3265 flow [2024-06-14 11:38:08,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3265, PETRI_PLACES=290, PETRI_TRANSITIONS=327} [2024-06-14 11:38:08,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 11:38:08,344 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 327 transitions, 3265 flow [2024-06-14 11:38:08,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:08,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:08,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:38:08,344 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:08,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash 158768791, now seen corresponding path program 3 times [2024-06-14 11:38:08,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:08,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898133445] [2024-06-14 11:38:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:08,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898133445] [2024-06-14 11:38:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898133445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:08,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:08,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910923889] [2024-06-14 11:38:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:08,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:08,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:08,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:08,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 327 transitions, 3265 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:08,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:08,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:08,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:08,969 INFO L124 PetriNetUnfolderBase]: 2011/3564 cut-off events. [2024-06-14 11:38:08,969 INFO L125 PetriNetUnfolderBase]: For 326056/326056 co-relation queries the response was YES. [2024-06-14 11:38:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23165 conditions, 3564 events. 2011/3564 cut-off events. For 326056/326056 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23264 event pairs, 437 based on Foata normal form. 2/3562 useless extension candidates. Maximal degree in co-relation 23040. Up to 3106 conditions per place. [2024-06-14 11:38:09,008 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 304 selfloop transitions, 28 changer transitions 0/341 dead transitions. [2024-06-14 11:38:09,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 341 transitions, 4001 flow [2024-06-14 11:38:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:38:09,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 11:38:09,010 INFO L175 Difference]: Start difference. First operand has 290 places, 327 transitions, 3265 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:38:09,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 341 transitions, 4001 flow [2024-06-14 11:38:09,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 341 transitions, 3914 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:09,816 INFO L231 Difference]: Finished difference. Result has 292 places, 329 transitions, 3287 flow [2024-06-14 11:38:09,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3287, PETRI_PLACES=292, PETRI_TRANSITIONS=329} [2024-06-14 11:38:09,816 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-14 11:38:09,816 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 329 transitions, 3287 flow [2024-06-14 11:38:09,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:09,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:09,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:09,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:38:09,817 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:09,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash -413763211, now seen corresponding path program 4 times [2024-06-14 11:38:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:09,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126553328] [2024-06-14 11:38:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:09,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126553328] [2024-06-14 11:38:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126553328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:09,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:38:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759616492] [2024-06-14 11:38:09,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:09,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:38:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:09,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:38:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:38:09,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:09,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 329 transitions, 3287 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:09,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:09,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:10,444 INFO L124 PetriNetUnfolderBase]: 2006/3557 cut-off events. [2024-06-14 11:38:10,444 INFO L125 PetriNetUnfolderBase]: For 324985/324985 co-relation queries the response was YES. [2024-06-14 11:38:10,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23049 conditions, 3557 events. 2006/3557 cut-off events. For 324985/324985 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23229 event pairs, 417 based on Foata normal form. 2/3555 useless extension candidates. Maximal degree in co-relation 22923. Up to 3073 conditions per place. [2024-06-14 11:38:10,484 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 300 selfloop transitions, 35 changer transitions 0/344 dead transitions. [2024-06-14 11:38:10,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 344 transitions, 4035 flow [2024-06-14 11:38:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:38:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:38:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:38:10,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 11:38:10,485 INFO L175 Difference]: Start difference. First operand has 292 places, 329 transitions, 3287 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:38:10,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 344 transitions, 4035 flow [2024-06-14 11:38:11,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 344 transitions, 3942 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:11,596 INFO L231 Difference]: Finished difference. Result has 294 places, 331 transitions, 3321 flow [2024-06-14 11:38:11,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3321, PETRI_PLACES=294, PETRI_TRANSITIONS=331} [2024-06-14 11:38:11,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-14 11:38:11,597 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 331 transitions, 3321 flow [2024-06-14 11:38:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:11,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:11,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:11,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:38:11,597 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:11,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 613354516, now seen corresponding path program 1 times [2024-06-14 11:38:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:11,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146154932] [2024-06-14 11:38:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146154932] [2024-06-14 11:38:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146154932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:11,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:11,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273452191] [2024-06-14 11:38:11,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:11,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:11,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 331 transitions, 3321 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:11,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:11,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:11,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:12,339 INFO L124 PetriNetUnfolderBase]: 2040/3613 cut-off events. [2024-06-14 11:38:12,339 INFO L125 PetriNetUnfolderBase]: For 347299/347299 co-relation queries the response was YES. [2024-06-14 11:38:12,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23893 conditions, 3613 events. 2040/3613 cut-off events. For 347299/347299 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23655 event pairs, 321 based on Foata normal form. 2/3612 useless extension candidates. Maximal degree in co-relation 23766. Up to 2969 conditions per place. [2024-06-14 11:38:12,380 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 55 changer transitions 0/378 dead transitions. [2024-06-14 11:38:12,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 378 transitions, 4653 flow [2024-06-14 11:38:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:38:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:38:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-14 11:38:12,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5883838383838383 [2024-06-14 11:38:12,382 INFO L175 Difference]: Start difference. First operand has 294 places, 331 transitions, 3321 flow. Second operand 9 states and 233 transitions. [2024-06-14 11:38:12,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 378 transitions, 4653 flow [2024-06-14 11:38:13,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 378 transitions, 4542 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:13,505 INFO L231 Difference]: Finished difference. Result has 299 places, 338 transitions, 3453 flow [2024-06-14 11:38:13,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3453, PETRI_PLACES=299, PETRI_TRANSITIONS=338} [2024-06-14 11:38:13,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 11:38:13,505 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 338 transitions, 3453 flow [2024-06-14 11:38:13,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:13,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:13,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:38:13,506 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:13,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1186968690, now seen corresponding path program 2 times [2024-06-14 11:38:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467128976] [2024-06-14 11:38:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467128976] [2024-06-14 11:38:13,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467128976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:13,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:13,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189683670] [2024-06-14 11:38:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:13,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:13,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 338 transitions, 3453 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:13,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:13,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:13,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:14,249 INFO L124 PetriNetUnfolderBase]: 2061/3652 cut-off events. [2024-06-14 11:38:14,250 INFO L125 PetriNetUnfolderBase]: For 364614/364614 co-relation queries the response was YES. [2024-06-14 11:38:14,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24588 conditions, 3652 events. 2061/3652 cut-off events. For 364614/364614 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23909 event pairs, 325 based on Foata normal form. 2/3651 useless extension candidates. Maximal degree in co-relation 24459. Up to 2989 conditions per place. [2024-06-14 11:38:14,290 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 313 selfloop transitions, 57 changer transitions 0/379 dead transitions. [2024-06-14 11:38:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 379 transitions, 4747 flow [2024-06-14 11:38:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:38:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:38:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 11:38:14,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5808080808080808 [2024-06-14 11:38:14,292 INFO L175 Difference]: Start difference. First operand has 299 places, 338 transitions, 3453 flow. Second operand 9 states and 230 transitions. [2024-06-14 11:38:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 379 transitions, 4747 flow [2024-06-14 11:38:15,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 379 transitions, 4589 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:15,455 INFO L231 Difference]: Finished difference. Result has 305 places, 343 transitions, 3529 flow [2024-06-14 11:38:15,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3529, PETRI_PLACES=305, PETRI_TRANSITIONS=343} [2024-06-14 11:38:15,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 11:38:15,455 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 343 transitions, 3529 flow [2024-06-14 11:38:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:15,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:15,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:38:15,456 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:15,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -936074220, now seen corresponding path program 3 times [2024-06-14 11:38:15,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:15,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416273544] [2024-06-14 11:38:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:15,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416273544] [2024-06-14 11:38:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416273544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:15,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:15,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026022823] [2024-06-14 11:38:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:15,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:15,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 343 transitions, 3529 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:15,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:15,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:15,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:16,196 INFO L124 PetriNetUnfolderBase]: 2056/3640 cut-off events. [2024-06-14 11:38:16,197 INFO L125 PetriNetUnfolderBase]: For 361822/361822 co-relation queries the response was YES. [2024-06-14 11:38:16,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24334 conditions, 3640 events. 2056/3640 cut-off events. For 361822/361822 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23916 event pairs, 410 based on Foata normal form. 2/3634 useless extension candidates. Maximal degree in co-relation 24202. Up to 3099 conditions per place. [2024-06-14 11:38:16,237 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 323 selfloop transitions, 44 changer transitions 0/376 dead transitions. [2024-06-14 11:38:16,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 376 transitions, 4533 flow [2024-06-14 11:38:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:38:16,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:38:16,239 INFO L175 Difference]: Start difference. First operand has 305 places, 343 transitions, 3529 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:38:16,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 376 transitions, 4533 flow [2024-06-14 11:38:17,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 376 transitions, 4424 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:17,648 INFO L231 Difference]: Finished difference. Result has 308 places, 343 transitions, 3513 flow [2024-06-14 11:38:17,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3513, PETRI_PLACES=308, PETRI_TRANSITIONS=343} [2024-06-14 11:38:17,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-14 11:38:17,649 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 343 transitions, 3513 flow [2024-06-14 11:38:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:17,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:17,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:38:17,650 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:17,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 425729310, now seen corresponding path program 4 times [2024-06-14 11:38:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478025158] [2024-06-14 11:38:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:17,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:17,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478025158] [2024-06-14 11:38:17,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478025158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:17,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:17,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698691575] [2024-06-14 11:38:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:17,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:17,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 343 transitions, 3513 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:17,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:17,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:18,388 INFO L124 PetriNetUnfolderBase]: 2064/3657 cut-off events. [2024-06-14 11:38:18,388 INFO L125 PetriNetUnfolderBase]: For 369722/369722 co-relation queries the response was YES. [2024-06-14 11:38:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24421 conditions, 3657 events. 2064/3657 cut-off events. For 369722/369722 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24049 event pairs, 417 based on Foata normal form. 2/3656 useless extension candidates. Maximal degree in co-relation 24288. Up to 3146 conditions per place. [2024-06-14 11:38:18,431 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 322 selfloop transitions, 42 changer transitions 0/373 dead transitions. [2024-06-14 11:38:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 373 transitions, 4339 flow [2024-06-14 11:38:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:38:18,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-14 11:38:18,432 INFO L175 Difference]: Start difference. First operand has 308 places, 343 transitions, 3513 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:38:18,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 373 transitions, 4339 flow [2024-06-14 11:38:20,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 373 transitions, 4221 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:38:20,103 INFO L231 Difference]: Finished difference. Result has 309 places, 345 transitions, 3516 flow [2024-06-14 11:38:20,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3516, PETRI_PLACES=309, PETRI_TRANSITIONS=345} [2024-06-14 11:38:20,103 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-14 11:38:20,103 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 345 transitions, 3516 flow [2024-06-14 11:38:20,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:20,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:20,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:20,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:38:20,104 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:20,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1355804098, now seen corresponding path program 5 times [2024-06-14 11:38:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289286202] [2024-06-14 11:38:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289286202] [2024-06-14 11:38:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289286202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:20,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:20,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:20,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018263007] [2024-06-14 11:38:20,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:20,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 345 transitions, 3516 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:20,868 INFO L124 PetriNetUnfolderBase]: 2085/3692 cut-off events. [2024-06-14 11:38:20,868 INFO L125 PetriNetUnfolderBase]: For 386286/386286 co-relation queries the response was YES. [2024-06-14 11:38:20,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24828 conditions, 3692 events. 2085/3692 cut-off events. For 386286/386286 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24286 event pairs, 418 based on Foata normal form. 2/3691 useless extension candidates. Maximal degree in co-relation 24694. Up to 3154 conditions per place. [2024-06-14 11:38:20,911 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 323 selfloop transitions, 49 changer transitions 0/381 dead transitions. [2024-06-14 11:38:20,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 381 transitions, 4580 flow [2024-06-14 11:38:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:38:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:38:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 11:38:20,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-14 11:38:20,913 INFO L175 Difference]: Start difference. First operand has 309 places, 345 transitions, 3516 flow. Second operand 10 states and 244 transitions. [2024-06-14 11:38:20,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 381 transitions, 4580 flow [2024-06-14 11:38:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 381 transitions, 4489 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:22,692 INFO L231 Difference]: Finished difference. Result has 314 places, 349 transitions, 3595 flow [2024-06-14 11:38:22,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3595, PETRI_PLACES=314, PETRI_TRANSITIONS=349} [2024-06-14 11:38:22,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-14 11:38:22,693 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 349 transitions, 3595 flow [2024-06-14 11:38:22,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:22,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:22,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:22,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:38:22,694 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:22,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash 653630460, now seen corresponding path program 6 times [2024-06-14 11:38:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006850758] [2024-06-14 11:38:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:22,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006850758] [2024-06-14 11:38:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006850758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:22,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738802469] [2024-06-14 11:38:22,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:22,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:22,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:22,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 349 transitions, 3595 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:22,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:22,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:22,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:23,464 INFO L124 PetriNetUnfolderBase]: 2080/3685 cut-off events. [2024-06-14 11:38:23,465 INFO L125 PetriNetUnfolderBase]: For 384865/384865 co-relation queries the response was YES. [2024-06-14 11:38:23,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24762 conditions, 3685 events. 2080/3685 cut-off events. For 384865/384865 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24269 event pairs, 419 based on Foata normal form. 2/3684 useless extension candidates. Maximal degree in co-relation 24626. Up to 3170 conditions per place. [2024-06-14 11:38:23,510 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 327 selfloop transitions, 43 changer transitions 0/379 dead transitions. [2024-06-14 11:38:23,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 379 transitions, 4409 flow [2024-06-14 11:38:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:38:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:38:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 11:38:23,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 11:38:23,511 INFO L175 Difference]: Start difference. First operand has 314 places, 349 transitions, 3595 flow. Second operand 10 states and 242 transitions. [2024-06-14 11:38:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 379 transitions, 4409 flow [2024-06-14 11:38:25,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 379 transitions, 4303 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:38:25,360 INFO L231 Difference]: Finished difference. Result has 317 places, 349 transitions, 3580 flow [2024-06-14 11:38:25,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3580, PETRI_PLACES=317, PETRI_TRANSITIONS=349} [2024-06-14 11:38:25,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-14 11:38:25,361 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 349 transitions, 3580 flow [2024-06-14 11:38:25,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:25,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:25,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:25,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:38:25,362 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:25,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:25,362 INFO L85 PathProgramCache]: Analyzing trace with hash -87737032, now seen corresponding path program 1 times [2024-06-14 11:38:25,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:25,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739224522] [2024-06-14 11:38:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:25,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:25,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739224522] [2024-06-14 11:38:25,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739224522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:25,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:25,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574491990] [2024-06-14 11:38:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:25,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:25,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:25,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:25,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 349 transitions, 3580 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:25,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:25,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:25,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:26,241 INFO L124 PetriNetUnfolderBase]: 2085/3695 cut-off events. [2024-06-14 11:38:26,242 INFO L125 PetriNetUnfolderBase]: For 387482/387482 co-relation queries the response was YES. [2024-06-14 11:38:26,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24852 conditions, 3695 events. 2085/3695 cut-off events. For 387482/387482 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24356 event pairs, 417 based on Foata normal form. 1/3694 useless extension candidates. Maximal degree in co-relation 24715. Up to 3201 conditions per place. [2024-06-14 11:38:26,287 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 19 changer transitions 0/382 dead transitions. [2024-06-14 11:38:26,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 382 transitions, 4450 flow [2024-06-14 11:38:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:38:26,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 11:38:26,288 INFO L175 Difference]: Start difference. First operand has 317 places, 349 transitions, 3580 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:38:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 382 transitions, 4450 flow [2024-06-14 11:38:28,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 382 transitions, 4354 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:38:28,322 INFO L231 Difference]: Finished difference. Result has 316 places, 352 transitions, 3582 flow [2024-06-14 11:38:28,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3582, PETRI_PLACES=316, PETRI_TRANSITIONS=352} [2024-06-14 11:38:28,323 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-14 11:38:28,323 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 352 transitions, 3582 flow [2024-06-14 11:38:28,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:28,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:28,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:38:28,323 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:28,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -87617062, now seen corresponding path program 2 times [2024-06-14 11:38:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:28,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127859796] [2024-06-14 11:38:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:28,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:28,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127859796] [2024-06-14 11:38:28,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127859796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:28,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:28,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:28,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019231144] [2024-06-14 11:38:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:28,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:28,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:28,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:28,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:28,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:28,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 352 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:28,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:28,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:28,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:29,036 INFO L124 PetriNetUnfolderBase]: 2098/3716 cut-off events. [2024-06-14 11:38:29,036 INFO L125 PetriNetUnfolderBase]: For 401239/401239 co-relation queries the response was YES. [2024-06-14 11:38:29,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25474 conditions, 3716 events. 2098/3716 cut-off events. For 401239/401239 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24581 event pairs, 418 based on Foata normal form. 1/3714 useless extension candidates. Maximal degree in co-relation 25336. Up to 3178 conditions per place. [2024-06-14 11:38:29,082 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 329 selfloop transitions, 48 changer transitions 0/386 dead transitions. [2024-06-14 11:38:29,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 386 transitions, 4712 flow [2024-06-14 11:38:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:38:29,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-14 11:38:29,084 INFO L175 Difference]: Start difference. First operand has 316 places, 352 transitions, 3582 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:38:29,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 386 transitions, 4712 flow [2024-06-14 11:38:31,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 386 transitions, 4626 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:31,076 INFO L231 Difference]: Finished difference. Result has 318 places, 358 transitions, 3712 flow [2024-06-14 11:38:31,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3712, PETRI_PLACES=318, PETRI_TRANSITIONS=358} [2024-06-14 11:38:31,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-14 11:38:31,077 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 358 transitions, 3712 flow [2024-06-14 11:38:31,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:31,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:31,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:31,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:38:31,078 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:31,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:31,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1184743284, now seen corresponding path program 3 times [2024-06-14 11:38:31,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:31,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746477688] [2024-06-14 11:38:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:31,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:31,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:31,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746477688] [2024-06-14 11:38:31,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746477688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:31,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:31,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:31,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433779244] [2024-06-14 11:38:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:31,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:31,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 3712 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:31,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:31,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:31,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:31,809 INFO L124 PetriNetUnfolderBase]: 2103/3725 cut-off events. [2024-06-14 11:38:31,810 INFO L125 PetriNetUnfolderBase]: For 411944/411944 co-relation queries the response was YES. [2024-06-14 11:38:31,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25981 conditions, 3725 events. 2103/3725 cut-off events. For 411944/411944 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24607 event pairs, 418 based on Foata normal form. 1/3723 useless extension candidates. Maximal degree in co-relation 25842. Up to 3184 conditions per place. [2024-06-14 11:38:31,854 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 52 changer transitions 0/391 dead transitions. [2024-06-14 11:38:31,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 391 transitions, 4810 flow [2024-06-14 11:38:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:38:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:38:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 11:38:31,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 11:38:31,857 INFO L175 Difference]: Start difference. First operand has 318 places, 358 transitions, 3712 flow. Second operand 10 states and 245 transitions. [2024-06-14 11:38:31,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 391 transitions, 4810 flow [2024-06-14 11:38:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 391 transitions, 4688 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:33,881 INFO L231 Difference]: Finished difference. Result has 324 places, 361 transitions, 3760 flow [2024-06-14 11:38:33,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3760, PETRI_PLACES=324, PETRI_TRANSITIONS=361} [2024-06-14 11:38:33,881 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-14 11:38:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 361 transitions, 3760 flow [2024-06-14 11:38:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:33,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:33,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:38:33,882 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -82968488, now seen corresponding path program 1 times [2024-06-14 11:38:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299955060] [2024-06-14 11:38:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:33,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:33,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299955060] [2024-06-14 11:38:33,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299955060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:33,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:33,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380739120] [2024-06-14 11:38:33,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:33,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:33,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:34,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:34,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 361 transitions, 3760 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:34,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:34,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:34,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:34,609 INFO L124 PetriNetUnfolderBase]: 2116/3746 cut-off events. [2024-06-14 11:38:34,609 INFO L125 PetriNetUnfolderBase]: For 424783/424783 co-relation queries the response was YES. [2024-06-14 11:38:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 3746 events. 2116/3746 cut-off events. For 424783/424783 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24803 event pairs, 418 based on Foata normal form. 1/3743 useless extension candidates. Maximal degree in co-relation 26207. Up to 3182 conditions per place. [2024-06-14 11:38:34,660 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 58 changer transitions 0/395 dead transitions. [2024-06-14 11:38:34,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 395 transitions, 4912 flow [2024-06-14 11:38:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:38:34,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:38:34,661 INFO L175 Difference]: Start difference. First operand has 324 places, 361 transitions, 3760 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:38:34,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 395 transitions, 4912 flow [2024-06-14 11:38:36,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 395 transitions, 4776 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:38:36,882 INFO L231 Difference]: Finished difference. Result has 324 places, 367 transitions, 3860 flow [2024-06-14 11:38:36,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3860, PETRI_PLACES=324, PETRI_TRANSITIONS=367} [2024-06-14 11:38:36,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-14 11:38:36,883 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 367 transitions, 3860 flow [2024-06-14 11:38:36,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:36,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:36,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:38:36,884 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:36,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1503536784, now seen corresponding path program 2 times [2024-06-14 11:38:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:36,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105365082] [2024-06-14 11:38:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:36,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105365082] [2024-06-14 11:38:37,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105365082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:37,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:37,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667951456] [2024-06-14 11:38:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:37,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:37,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 367 transitions, 3860 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:37,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:37,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:37,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:37,647 INFO L124 PetriNetUnfolderBase]: 2134/3777 cut-off events. [2024-06-14 11:38:37,648 INFO L125 PetriNetUnfolderBase]: For 440299/440299 co-relation queries the response was YES. [2024-06-14 11:38:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27010 conditions, 3777 events. 2134/3777 cut-off events. For 440299/440299 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25029 event pairs, 418 based on Foata normal form. 1/3774 useless extension candidates. Maximal degree in co-relation 26868. Up to 3201 conditions per place. [2024-06-14 11:38:37,693 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 68 changer transitions 0/407 dead transitions. [2024-06-14 11:38:37,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 407 transitions, 5289 flow [2024-06-14 11:38:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:38:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:38:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 11:38:37,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 11:38:37,694 INFO L175 Difference]: Start difference. First operand has 324 places, 367 transitions, 3860 flow. Second operand 10 states and 251 transitions. [2024-06-14 11:38:37,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 407 transitions, 5289 flow [2024-06-14 11:38:40,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 407 transitions, 5033 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:40,097 INFO L231 Difference]: Finished difference. Result has 329 places, 376 transitions, 3895 flow [2024-06-14 11:38:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3895, PETRI_PLACES=329, PETRI_TRANSITIONS=376} [2024-06-14 11:38:40,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 11:38:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 376 transitions, 3895 flow [2024-06-14 11:38:40,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:38:40,098 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:40,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1512107664, now seen corresponding path program 3 times [2024-06-14 11:38:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567529363] [2024-06-14 11:38:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567529363] [2024-06-14 11:38:40,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567529363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:40,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:40,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831294426] [2024-06-14 11:38:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:40,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:40,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:40,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:40,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:40,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 376 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:40,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:40,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:40,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:40,896 INFO L124 PetriNetUnfolderBase]: 2131/3773 cut-off events. [2024-06-14 11:38:40,897 INFO L125 PetriNetUnfolderBase]: For 442481/442481 co-relation queries the response was YES. [2024-06-14 11:38:40,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26867 conditions, 3773 events. 2131/3773 cut-off events. For 442481/442481 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25022 event pairs, 418 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 26725. Up to 3198 conditions per place. [2024-06-14 11:38:40,948 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 70 changer transitions 0/407 dead transitions. [2024-06-14 11:38:40,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 407 transitions, 4973 flow [2024-06-14 11:38:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:38:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:38:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-14 11:38:40,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516528925619835 [2024-06-14 11:38:40,950 INFO L175 Difference]: Start difference. First operand has 329 places, 376 transitions, 3895 flow. Second operand 11 states and 267 transitions. [2024-06-14 11:38:40,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 407 transitions, 4973 flow [2024-06-14 11:38:43,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 407 transitions, 4793 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:43,377 INFO L231 Difference]: Finished difference. Result has 334 places, 376 transitions, 3861 flow [2024-06-14 11:38:43,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3715, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3861, PETRI_PLACES=334, PETRI_TRANSITIONS=376} [2024-06-14 11:38:43,377 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 11:38:43,378 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 376 transitions, 3861 flow [2024-06-14 11:38:43,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:43,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:43,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:43,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:38:43,378 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:43,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash 620029684, now seen corresponding path program 1 times [2024-06-14 11:38:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566265822] [2024-06-14 11:38:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566265822] [2024-06-14 11:38:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566265822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012208668] [2024-06-14 11:38:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:43,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:43,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 376 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:43,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:43,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:43,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:44,175 INFO L124 PetriNetUnfolderBase]: 2211/3913 cut-off events. [2024-06-14 11:38:44,175 INFO L125 PetriNetUnfolderBase]: For 478979/478979 co-relation queries the response was YES. [2024-06-14 11:38:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27640 conditions, 3913 events. 2211/3913 cut-off events. For 478979/478979 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 26011 event pairs, 358 based on Foata normal form. 6/3915 useless extension candidates. Maximal degree in co-relation 27497. Up to 3143 conditions per place. [2024-06-14 11:38:44,224 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 352 selfloop transitions, 55 changer transitions 0/416 dead transitions. [2024-06-14 11:38:44,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 416 transitions, 5077 flow [2024-06-14 11:38:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 11:38:44,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-14 11:38:44,225 INFO L175 Difference]: Start difference. First operand has 334 places, 376 transitions, 3861 flow. Second operand 8 states and 210 transitions. [2024-06-14 11:38:44,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 416 transitions, 5077 flow [2024-06-14 11:38:46,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 416 transitions, 4923 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:38:46,820 INFO L231 Difference]: Finished difference. Result has 333 places, 380 transitions, 3910 flow [2024-06-14 11:38:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3910, PETRI_PLACES=333, PETRI_TRANSITIONS=380} [2024-06-14 11:38:46,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 11:38:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 380 transitions, 3910 flow [2024-06-14 11:38:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:46,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:46,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:46,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:38:46,821 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1181890292, now seen corresponding path program 2 times [2024-06-14 11:38:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209480724] [2024-06-14 11:38:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209480724] [2024-06-14 11:38:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209480724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:46,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537627641] [2024-06-14 11:38:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:46,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:47,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:47,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 380 transitions, 3910 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:47,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:47,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:47,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:47,630 INFO L124 PetriNetUnfolderBase]: 2259/3991 cut-off events. [2024-06-14 11:38:47,630 INFO L125 PetriNetUnfolderBase]: For 489936/489936 co-relation queries the response was YES. [2024-06-14 11:38:47,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28437 conditions, 3991 events. 2259/3991 cut-off events. For 489936/489936 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26616 event pairs, 442 based on Foata normal form. 6/3993 useless extension candidates. Maximal degree in co-relation 28292. Up to 3382 conditions per place. [2024-06-14 11:38:47,683 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 356 selfloop transitions, 48 changer transitions 0/413 dead transitions. [2024-06-14 11:38:47,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 413 transitions, 4882 flow [2024-06-14 11:38:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:38:47,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:38:47,685 INFO L175 Difference]: Start difference. First operand has 333 places, 380 transitions, 3910 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:38:47,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 413 transitions, 4882 flow [2024-06-14 11:38:50,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 413 transitions, 4773 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:50,434 INFO L231 Difference]: Finished difference. Result has 337 places, 382 transitions, 3955 flow [2024-06-14 11:38:50,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3955, PETRI_PLACES=337, PETRI_TRANSITIONS=382} [2024-06-14 11:38:50,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 11:38:50,435 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 382 transitions, 3955 flow [2024-06-14 11:38:50,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:50,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:50,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:50,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:38:50,436 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:50,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -701421096, now seen corresponding path program 7 times [2024-06-14 11:38:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:50,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192040376] [2024-06-14 11:38:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192040376] [2024-06-14 11:38:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192040376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:50,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:50,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104243247] [2024-06-14 11:38:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:50,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:50,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:50,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:50,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 382 transitions, 3955 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:50,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:50,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:51,283 INFO L124 PetriNetUnfolderBase]: 2280/4020 cut-off events. [2024-06-14 11:38:51,284 INFO L125 PetriNetUnfolderBase]: For 487711/487711 co-relation queries the response was YES. [2024-06-14 11:38:51,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28871 conditions, 4020 events. 2280/4020 cut-off events. For 487711/487711 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26886 event pairs, 451 based on Foata normal form. 2/4011 useless extension candidates. Maximal degree in co-relation 28724. Up to 3348 conditions per place. [2024-06-14 11:38:51,339 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 315 selfloop transitions, 93 changer transitions 0/417 dead transitions. [2024-06-14 11:38:51,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 417 transitions, 5161 flow [2024-06-14 11:38:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 11:38:51,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:38:51,340 INFO L175 Difference]: Start difference. First operand has 337 places, 382 transitions, 3955 flow. Second operand 8 states and 208 transitions. [2024-06-14 11:38:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 417 transitions, 5161 flow [2024-06-14 11:38:54,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 417 transitions, 5053 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:54,383 INFO L231 Difference]: Finished difference. Result has 341 places, 387 transitions, 4156 flow [2024-06-14 11:38:54,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4156, PETRI_PLACES=341, PETRI_TRANSITIONS=387} [2024-06-14 11:38:54,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 11:38:54,384 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 387 transitions, 4156 flow [2024-06-14 11:38:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:54,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:54,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:38:54,385 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:54,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash -691897896, now seen corresponding path program 8 times [2024-06-14 11:38:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6971164] [2024-06-14 11:38:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:54,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:54,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6971164] [2024-06-14 11:38:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6971164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:54,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313753228] [2024-06-14 11:38:54,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:54,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:54,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:54,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 387 transitions, 4156 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:54,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:54,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:54,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:55,226 INFO L124 PetriNetUnfolderBase]: 2288/4037 cut-off events. [2024-06-14 11:38:55,226 INFO L125 PetriNetUnfolderBase]: For 498092/498092 co-relation queries the response was YES. [2024-06-14 11:38:55,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29228 conditions, 4037 events. 2288/4037 cut-off events. For 498092/498092 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27046 event pairs, 458 based on Foata normal form. 2/4033 useless extension candidates. Maximal degree in co-relation 29079. Up to 3395 conditions per place. [2024-06-14 11:38:55,284 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 91 changer transitions 0/414 dead transitions. [2024-06-14 11:38:55,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 414 transitions, 5078 flow [2024-06-14 11:38:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:38:55,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-14 11:38:55,286 INFO L175 Difference]: Start difference. First operand has 341 places, 387 transitions, 4156 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:38:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 414 transitions, 5078 flow [2024-06-14 11:38:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 414 transitions, 4872 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 11:38:57,669 INFO L231 Difference]: Finished difference. Result has 345 places, 389 transitions, 4191 flow [2024-06-14 11:38:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=345, PETRI_TRANSITIONS=389} [2024-06-14 11:38:57,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-14 11:38:57,669 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 389 transitions, 4191 flow [2024-06-14 11:38:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:38:57,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:38:57,671 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:57,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1700321752, now seen corresponding path program 9 times [2024-06-14 11:38:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:57,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214036585] [2024-06-14 11:38:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214036585] [2024-06-14 11:38:57,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214036585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:57,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:57,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:57,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579134371] [2024-06-14 11:38:57,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:57,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:57,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:38:57,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 389 transitions, 4191 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:38:57,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:57,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:38:57,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:58,518 INFO L124 PetriNetUnfolderBase]: 2296/4049 cut-off events. [2024-06-14 11:38:58,518 INFO L125 PetriNetUnfolderBase]: For 505042/505042 co-relation queries the response was YES. [2024-06-14 11:38:58,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29295 conditions, 4049 events. 2296/4049 cut-off events. For 505042/505042 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 27111 event pairs, 458 based on Foata normal form. 2/4045 useless extension candidates. Maximal degree in co-relation 29144. Up to 3407 conditions per place. [2024-06-14 11:38:58,581 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 90 changer transitions 0/413 dead transitions. [2024-06-14 11:38:58,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 413 transitions, 5079 flow [2024-06-14 11:38:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:38:58,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:38:58,583 INFO L175 Difference]: Start difference. First operand has 345 places, 389 transitions, 4191 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:38:58,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 413 transitions, 5079 flow [2024-06-14 11:39:01,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 413 transitions, 4888 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:01,546 INFO L231 Difference]: Finished difference. Result has 347 places, 391 transitions, 4215 flow [2024-06-14 11:39:01,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=347, PETRI_TRANSITIONS=391} [2024-06-14 11:39:01,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-14 11:39:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 391 transitions, 4215 flow [2024-06-14 11:39:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:01,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:01,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:39:01,547 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:01,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash -884189130, now seen corresponding path program 10 times [2024-06-14 11:39:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:01,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446237974] [2024-06-14 11:39:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:01,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:01,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446237974] [2024-06-14 11:39:01,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446237974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:01,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:01,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413728217] [2024-06-14 11:39:01,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:01,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:01,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 391 transitions, 4215 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:02,425 INFO L124 PetriNetUnfolderBase]: 2304/4061 cut-off events. [2024-06-14 11:39:02,425 INFO L125 PetriNetUnfolderBase]: For 514075/514075 co-relation queries the response was YES. [2024-06-14 11:39:02,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29459 conditions, 4061 events. 2304/4061 cut-off events. For 514075/514075 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 27178 event pairs, 458 based on Foata normal form. 2/4057 useless extension candidates. Maximal degree in co-relation 29307. Up to 3419 conditions per place. [2024-06-14 11:39:02,474 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 313 selfloop transitions, 90 changer transitions 0/412 dead transitions. [2024-06-14 11:39:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 412 transitions, 5097 flow [2024-06-14 11:39:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:39:02,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:39:02,475 INFO L175 Difference]: Start difference. First operand has 347 places, 391 transitions, 4215 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:39:02,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 412 transitions, 5097 flow [2024-06-14 11:39:05,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 412 transitions, 4904 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:05,540 INFO L231 Difference]: Finished difference. Result has 349 places, 393 transitions, 4241 flow [2024-06-14 11:39:05,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4241, PETRI_PLACES=349, PETRI_TRANSITIONS=393} [2024-06-14 11:39:05,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-14 11:39:05,541 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 393 transitions, 4241 flow [2024-06-14 11:39:05,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:05,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:05,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:05,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:39:05,542 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:05,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1994650604, now seen corresponding path program 11 times [2024-06-14 11:39:05,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920107194] [2024-06-14 11:39:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:05,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:05,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:05,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920107194] [2024-06-14 11:39:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920107194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:05,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:05,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405443949] [2024-06-14 11:39:05,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:05,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:05,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:05,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 393 transitions, 4241 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:05,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:05,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:05,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:06,434 INFO L124 PetriNetUnfolderBase]: 2312/4077 cut-off events. [2024-06-14 11:39:06,434 INFO L125 PetriNetUnfolderBase]: For 523040/523040 co-relation queries the response was YES. [2024-06-14 11:39:06,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29614 conditions, 4077 events. 2312/4077 cut-off events. For 523040/523040 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27263 event pairs, 452 based on Foata normal form. 2/4076 useless extension candidates. Maximal degree in co-relation 29461. Up to 3542 conditions per place. [2024-06-14 11:39:06,493 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 375 selfloop transitions, 30 changer transitions 0/414 dead transitions. [2024-06-14 11:39:06,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 414 transitions, 5127 flow [2024-06-14 11:39:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:39:06,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-14 11:39:06,494 INFO L175 Difference]: Start difference. First operand has 349 places, 393 transitions, 4241 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:39:06,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 414 transitions, 5127 flow [2024-06-14 11:39:09,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 414 transitions, 4930 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:09,369 INFO L231 Difference]: Finished difference. Result has 351 places, 395 transitions, 4143 flow [2024-06-14 11:39:09,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4143, PETRI_PLACES=351, PETRI_TRANSITIONS=395} [2024-06-14 11:39:09,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-14 11:39:09,370 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 395 transitions, 4143 flow [2024-06-14 11:39:09,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:09,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:09,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:39:09,371 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:09,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash -578087562, now seen corresponding path program 12 times [2024-06-14 11:39:09,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707019176] [2024-06-14 11:39:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:09,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:09,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707019176] [2024-06-14 11:39:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707019176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:09,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:09,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822865512] [2024-06-14 11:39:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:09,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:09,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:09,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:09,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 395 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:09,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:09,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:09,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:10,273 INFO L124 PetriNetUnfolderBase]: 2320/4091 cut-off events. [2024-06-14 11:39:10,273 INFO L125 PetriNetUnfolderBase]: For 532035/532035 co-relation queries the response was YES. [2024-06-14 11:39:10,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29624 conditions, 4091 events. 2320/4091 cut-off events. For 532035/532035 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27378 event pairs, 450 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 29470. Up to 3540 conditions per place. [2024-06-14 11:39:10,336 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 375 selfloop transitions, 34 changer transitions 0/418 dead transitions. [2024-06-14 11:39:10,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 418 transitions, 5039 flow [2024-06-14 11:39:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:39:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:39:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 11:39:10,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-06-14 11:39:10,338 INFO L175 Difference]: Start difference. First operand has 351 places, 395 transitions, 4143 flow. Second operand 9 states and 214 transitions. [2024-06-14 11:39:10,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 418 transitions, 5039 flow [2024-06-14 11:39:13,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 418 transitions, 4964 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:13,161 INFO L231 Difference]: Finished difference. Result has 354 places, 397 transitions, 4173 flow [2024-06-14 11:39:13,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4173, PETRI_PLACES=354, PETRI_TRANSITIONS=397} [2024-06-14 11:39:13,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-14 11:39:13,162 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 397 transitions, 4173 flow [2024-06-14 11:39:13,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:13,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:13,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:13,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:39:13,162 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:13,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1540225164, now seen corresponding path program 4 times [2024-06-14 11:39:13,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:13,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690015895] [2024-06-14 11:39:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:13,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:13,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:13,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690015895] [2024-06-14 11:39:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690015895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:13,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:13,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:13,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106258125] [2024-06-14 11:39:13,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:13,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:13,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:13,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:13,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 397 transitions, 4173 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:13,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:13,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:13,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:14,064 INFO L124 PetriNetUnfolderBase]: 2336/4118 cut-off events. [2024-06-14 11:39:14,064 INFO L125 PetriNetUnfolderBase]: For 534925/534925 co-relation queries the response was YES. [2024-06-14 11:39:14,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29871 conditions, 4118 events. 2336/4118 cut-off events. For 534925/534925 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27660 event pairs, 461 based on Foata normal form. 1/4113 useless extension candidates. Maximal degree in co-relation 29716. Up to 3461 conditions per place. [2024-06-14 11:39:14,122 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 373 selfloop transitions, 48 changer transitions 0/430 dead transitions. [2024-06-14 11:39:14,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 430 transitions, 5173 flow [2024-06-14 11:39:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:39:14,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:39:14,123 INFO L175 Difference]: Start difference. First operand has 354 places, 397 transitions, 4173 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:39:14,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 430 transitions, 5173 flow [2024-06-14 11:39:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 430 transitions, 5094 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:17,013 INFO L231 Difference]: Finished difference. Result has 355 places, 403 transitions, 4292 flow [2024-06-14 11:39:17,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4292, PETRI_PLACES=355, PETRI_TRANSITIONS=403} [2024-06-14 11:39:17,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-14 11:39:17,014 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 403 transitions, 4292 flow [2024-06-14 11:39:17,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:17,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:39:17,016 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -691892936, now seen corresponding path program 5 times [2024-06-14 11:39:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932421131] [2024-06-14 11:39:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932421131] [2024-06-14 11:39:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932421131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700306744] [2024-06-14 11:39:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:17,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:17,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 403 transitions, 4292 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:17,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:17,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:17,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:17,901 INFO L124 PetriNetUnfolderBase]: 2357/4150 cut-off events. [2024-06-14 11:39:17,902 INFO L125 PetriNetUnfolderBase]: For 559978/559978 co-relation queries the response was YES. [2024-06-14 11:39:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30911 conditions, 4150 events. 2357/4150 cut-off events. For 559978/559978 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 27928 event pairs, 467 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 30755. Up to 3299 conditions per place. [2024-06-14 11:39:17,960 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 288 selfloop transitions, 146 changer transitions 0/443 dead transitions. [2024-06-14 11:39:17,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 443 transitions, 6412 flow [2024-06-14 11:39:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 11:39:17,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 11:39:17,961 INFO L175 Difference]: Start difference. First operand has 355 places, 403 transitions, 4292 flow. Second operand 8 states and 212 transitions. [2024-06-14 11:39:17,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 443 transitions, 6412 flow [2024-06-14 11:39:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 443 transitions, 6264 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:20,905 INFO L231 Difference]: Finished difference. Result has 358 places, 415 transitions, 4728 flow [2024-06-14 11:39:20,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4728, PETRI_PLACES=358, PETRI_TRANSITIONS=415} [2024-06-14 11:39:20,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-14 11:39:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 415 transitions, 4728 flow [2024-06-14 11:39:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:20,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:20,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:39:20,906 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:20,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1633153096, now seen corresponding path program 6 times [2024-06-14 11:39:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:20,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037472185] [2024-06-14 11:39:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037472185] [2024-06-14 11:39:21,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037472185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:21,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:21,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:21,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254420287] [2024-06-14 11:39:21,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:21,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:21,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:21,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:21,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 415 transitions, 4728 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:21,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:21,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:21,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:21,910 INFO L124 PetriNetUnfolderBase]: 2362/4162 cut-off events. [2024-06-14 11:39:21,910 INFO L125 PetriNetUnfolderBase]: For 573122/573122 co-relation queries the response was YES. [2024-06-14 11:39:21,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31589 conditions, 4162 events. 2362/4162 cut-off events. For 573122/573122 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28021 event pairs, 461 based on Foata normal form. 1/4157 useless extension candidates. Maximal degree in co-relation 31432. Up to 3484 conditions per place. [2024-06-14 11:39:21,964 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 378 selfloop transitions, 61 changer transitions 0/448 dead transitions. [2024-06-14 11:39:21,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 448 transitions, 5984 flow [2024-06-14 11:39:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:39:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:39:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-14 11:39:21,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-14 11:39:21,965 INFO L175 Difference]: Start difference. First operand has 358 places, 415 transitions, 4728 flow. Second operand 10 states and 247 transitions. [2024-06-14 11:39:21,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 448 transitions, 5984 flow [2024-06-14 11:39:25,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 448 transitions, 5739 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-06-14 11:39:25,305 INFO L231 Difference]: Finished difference. Result has 367 places, 418 transitions, 4697 flow [2024-06-14 11:39:25,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4697, PETRI_PLACES=367, PETRI_TRANSITIONS=418} [2024-06-14 11:39:25,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 11:39:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 418 transitions, 4697 flow [2024-06-14 11:39:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:25,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:39:25,306 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:25,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash 582492020, now seen corresponding path program 7 times [2024-06-14 11:39:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:25,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652123564] [2024-06-14 11:39:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:25,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:25,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652123564] [2024-06-14 11:39:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652123564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:25,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294175290] [2024-06-14 11:39:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:25,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:25,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:25,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:25,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 418 transitions, 4697 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:25,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:25,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:25,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:26,255 INFO L124 PetriNetUnfolderBase]: 2359/4158 cut-off events. [2024-06-14 11:39:26,255 INFO L125 PetriNetUnfolderBase]: For 574867/574867 co-relation queries the response was YES. [2024-06-14 11:39:26,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31535 conditions, 4158 events. 2359/4158 cut-off events. For 574867/574867 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28030 event pairs, 461 based on Foata normal form. 1/4153 useless extension candidates. Maximal degree in co-relation 31375. Up to 3481 conditions per place. [2024-06-14 11:39:26,317 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 373 selfloop transitions, 60 changer transitions 0/442 dead transitions. [2024-06-14 11:39:26,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 442 transitions, 5623 flow [2024-06-14 11:39:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:39:26,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-14 11:39:26,318 INFO L175 Difference]: Start difference. First operand has 367 places, 418 transitions, 4697 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:39:26,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 442 transitions, 5623 flow [2024-06-14 11:39:29,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 442 transitions, 5439 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 11:39:29,396 INFO L231 Difference]: Finished difference. Result has 367 places, 418 transitions, 4639 flow [2024-06-14 11:39:29,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=367, PETRI_TRANSITIONS=418} [2024-06-14 11:39:29,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 11:39:29,397 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 418 transitions, 4639 flow [2024-06-14 11:39:29,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:29,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:29,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:29,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:39:29,398 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:29,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:29,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1700326712, now seen corresponding path program 8 times [2024-06-14 11:39:29,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:29,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237489464] [2024-06-14 11:39:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:29,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:29,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237489464] [2024-06-14 11:39:29,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237489464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:29,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:29,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:29,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728810317] [2024-06-14 11:39:29,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:29,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:29,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:29,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:29,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 418 transitions, 4639 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:29,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:29,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:29,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:30,298 INFO L124 PetriNetUnfolderBase]: 2372/4177 cut-off events. [2024-06-14 11:39:30,298 INFO L125 PetriNetUnfolderBase]: For 591141/591141 co-relation queries the response was YES. [2024-06-14 11:39:30,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31831 conditions, 4177 events. 2372/4177 cut-off events. For 591141/591141 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28123 event pairs, 467 based on Foata normal form. 1/4169 useless extension candidates. Maximal degree in co-relation 31670. Up to 3317 conditions per place. [2024-06-14 11:39:30,360 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 153 changer transitions 0/448 dead transitions. [2024-06-14 11:39:30,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 448 transitions, 6379 flow [2024-06-14 11:39:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 11:39:30,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:39:30,362 INFO L175 Difference]: Start difference. First operand has 367 places, 418 transitions, 4639 flow. Second operand 8 states and 208 transitions. [2024-06-14 11:39:30,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 448 transitions, 6379 flow [2024-06-14 11:39:33,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 448 transitions, 6259 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:33,043 INFO L231 Difference]: Finished difference. Result has 368 places, 424 transitions, 4939 flow [2024-06-14 11:39:33,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4939, PETRI_PLACES=368, PETRI_TRANSITIONS=424} [2024-06-14 11:39:33,044 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-14 11:39:33,044 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 424 transitions, 4939 flow [2024-06-14 11:39:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:33,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:33,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:39:33,044 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:33,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1706992952, now seen corresponding path program 9 times [2024-06-14 11:39:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:33,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409774032] [2024-06-14 11:39:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:33,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409774032] [2024-06-14 11:39:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409774032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:33,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:33,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034645244] [2024-06-14 11:39:33,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:33,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:33,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:33,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 424 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:33,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:33,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:33,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:33,959 INFO L124 PetriNetUnfolderBase]: 2369/4173 cut-off events. [2024-06-14 11:39:33,960 INFO L125 PetriNetUnfolderBase]: For 594656/594656 co-relation queries the response was YES. [2024-06-14 11:39:34,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31957 conditions, 4173 events. 2369/4173 cut-off events. For 594656/594656 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28147 event pairs, 467 based on Foata normal form. 1/4165 useless extension candidates. Maximal degree in co-relation 31795. Up to 3314 conditions per place. [2024-06-14 11:39:34,017 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 154 changer transitions 0/447 dead transitions. [2024-06-14 11:39:34,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 447 transitions, 6339 flow [2024-06-14 11:39:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:39:34,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:39:34,018 INFO L175 Difference]: Start difference. First operand has 368 places, 424 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:39:34,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 447 transitions, 6339 flow [2024-06-14 11:39:37,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 447 transitions, 6019 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:37,413 INFO L231 Difference]: Finished difference. Result has 372 places, 424 transitions, 4933 flow [2024-06-14 11:39:37,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4933, PETRI_PLACES=372, PETRI_TRANSITIONS=424} [2024-06-14 11:39:37,414 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-14 11:39:37,414 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 424 transitions, 4933 flow [2024-06-14 11:39:37,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:37,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:37,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:39:37,415 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:37,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -691885992, now seen corresponding path program 4 times [2024-06-14 11:39:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:37,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142690188] [2024-06-14 11:39:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:37,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142690188] [2024-06-14 11:39:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142690188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:37,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939199997] [2024-06-14 11:39:37,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:37,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:37,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 424 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:37,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:37,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:37,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:38,278 INFO L124 PetriNetUnfolderBase]: 2382/4197 cut-off events. [2024-06-14 11:39:38,279 INFO L125 PetriNetUnfolderBase]: For 611686/611686 co-relation queries the response was YES. [2024-06-14 11:39:38,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32304 conditions, 4197 events. 2382/4197 cut-off events. For 611686/611686 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28354 event pairs, 464 based on Foata normal form. 1/4190 useless extension candidates. Maximal degree in co-relation 32141. Up to 3397 conditions per place. [2024-06-14 11:39:38,341 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 144 changer transitions 0/460 dead transitions. [2024-06-14 11:39:38,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 460 transitions, 6807 flow [2024-06-14 11:39:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 11:39:38,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965909090909091 [2024-06-14 11:39:38,343 INFO L175 Difference]: Start difference. First operand has 372 places, 424 transitions, 4933 flow. Second operand 8 states and 210 transitions. [2024-06-14 11:39:38,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 460 transitions, 6807 flow [2024-06-14 11:39:41,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 460 transitions, 6475 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:39:41,792 INFO L231 Difference]: Finished difference. Result has 372 places, 433 transitions, 5099 flow [2024-06-14 11:39:41,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5099, PETRI_PLACES=372, PETRI_TRANSITIONS=433} [2024-06-14 11:39:41,792 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-14 11:39:41,792 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 433 transitions, 5099 flow [2024-06-14 11:39:41,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:41,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:41,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:39:41,793 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:41,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash -814859146, now seen corresponding path program 5 times [2024-06-14 11:39:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175264496] [2024-06-14 11:39:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:41,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:41,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175264496] [2024-06-14 11:39:41,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175264496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:41,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:41,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267455113] [2024-06-14 11:39:41,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:41,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:41,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:41,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 433 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:41,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:41,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:41,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:42,725 INFO L124 PetriNetUnfolderBase]: 2395/4219 cut-off events. [2024-06-14 11:39:42,726 INFO L125 PetriNetUnfolderBase]: For 631218/631218 co-relation queries the response was YES. [2024-06-14 11:39:42,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32935 conditions, 4219 events. 2395/4219 cut-off events. For 631218/631218 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28542 event pairs, 464 based on Foata normal form. 1/4212 useless extension candidates. Maximal degree in co-relation 32772. Up to 3412 conditions per place. [2024-06-14 11:39:42,790 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 310 selfloop transitions, 144 changer transitions 0/463 dead transitions. [2024-06-14 11:39:42,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 463 transitions, 6923 flow [2024-06-14 11:39:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 11:39:42,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 11:39:42,791 INFO L175 Difference]: Start difference. First operand has 372 places, 433 transitions, 5099 flow. Second operand 8 states and 208 transitions. [2024-06-14 11:39:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 463 transitions, 6923 flow [2024-06-14 11:39:46,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 463 transitions, 6681 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 11:39:46,324 INFO L231 Difference]: Finished difference. Result has 377 places, 439 transitions, 5295 flow [2024-06-14 11:39:46,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5295, PETRI_PLACES=377, PETRI_TRANSITIONS=439} [2024-06-14 11:39:46,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 11:39:46,325 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 439 transitions, 5295 flow [2024-06-14 11:39:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:46,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:46,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:39:46,325 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:46,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2038358692, now seen corresponding path program 6 times [2024-06-14 11:39:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:46,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127701260] [2024-06-14 11:39:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127701260] [2024-06-14 11:39:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127701260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:46,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:46,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:46,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614483430] [2024-06-14 11:39:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:46,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:46,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:46,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:46,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:46,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 439 transitions, 5295 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:46,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:46,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:47,267 INFO L124 PetriNetUnfolderBase]: 2392/4215 cut-off events. [2024-06-14 11:39:47,268 INFO L125 PetriNetUnfolderBase]: For 633624/633624 co-relation queries the response was YES. [2024-06-14 11:39:47,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32998 conditions, 4215 events. 2392/4215 cut-off events. For 633624/633624 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28483 event pairs, 464 based on Foata normal form. 1/4208 useless extension candidates. Maximal degree in co-relation 32833. Up to 3409 conditions per place. [2024-06-14 11:39:47,325 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 146 changer transitions 0/462 dead transitions. [2024-06-14 11:39:47,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 462 transitions, 6737 flow [2024-06-14 11:39:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:39:47,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:39:47,326 INFO L175 Difference]: Start difference. First operand has 377 places, 439 transitions, 5295 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:39:47,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 462 transitions, 6737 flow [2024-06-14 11:39:51,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 462 transitions, 6465 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:39:51,594 INFO L231 Difference]: Finished difference. Result has 381 places, 439 transitions, 5321 flow [2024-06-14 11:39:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5321, PETRI_PLACES=381, PETRI_TRANSITIONS=439} [2024-06-14 11:39:51,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 11:39:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 439 transitions, 5321 flow [2024-06-14 11:39:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:51,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:39:51,595 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -870144712, now seen corresponding path program 10 times [2024-06-14 11:39:51,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273672532] [2024-06-14 11:39:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:51,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:51,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273672532] [2024-06-14 11:39:51,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273672532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:51,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584940180] [2024-06-14 11:39:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:51,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:51,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:51,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 439 transitions, 5321 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:52,469 INFO L124 PetriNetUnfolderBase]: 2421/4261 cut-off events. [2024-06-14 11:39:52,469 INFO L125 PetriNetUnfolderBase]: For 666614/666614 co-relation queries the response was YES. [2024-06-14 11:39:52,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33798 conditions, 4261 events. 2421/4261 cut-off events. For 666614/666614 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28893 event pairs, 467 based on Foata normal form. 1/4253 useless extension candidates. Maximal degree in co-relation 33632. Up to 3379 conditions per place. [2024-06-14 11:39:52,529 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 168 changer transitions 0/473 dead transitions. [2024-06-14 11:39:52,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 473 transitions, 7493 flow [2024-06-14 11:39:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:39:52,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:39:52,530 INFO L175 Difference]: Start difference. First operand has 381 places, 439 transitions, 5321 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:39:52,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 473 transitions, 7493 flow [2024-06-14 11:39:55,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 473 transitions, 7189 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:55,829 INFO L231 Difference]: Finished difference. Result has 382 places, 451 transitions, 5583 flow [2024-06-14 11:39:55,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5017, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=382, PETRI_TRANSITIONS=451} [2024-06-14 11:39:55,829 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-14 11:39:55,829 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 451 transitions, 5583 flow [2024-06-14 11:39:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:55,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:55,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:39:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:39:55,830 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:55,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:55,830 INFO L85 PathProgramCache]: Analyzing trace with hash -863478472, now seen corresponding path program 11 times [2024-06-14 11:39:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:55,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391096791] [2024-06-14 11:39:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:55,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:55,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:55,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391096791] [2024-06-14 11:39:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391096791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:55,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:55,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522469755] [2024-06-14 11:39:55,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:55,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:55,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:39:55,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 451 transitions, 5583 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:39:55,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:55,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:39:55,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:56,749 INFO L124 PetriNetUnfolderBase]: 2418/4257 cut-off events. [2024-06-14 11:39:56,749 INFO L125 PetriNetUnfolderBase]: For 669966/669966 co-relation queries the response was YES. [2024-06-14 11:39:56,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33800 conditions, 4257 events. 2418/4257 cut-off events. For 669966/669966 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28899 event pairs, 467 based on Foata normal form. 1/4249 useless extension candidates. Maximal degree in co-relation 33633. Up to 3376 conditions per place. [2024-06-14 11:39:56,814 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 170 changer transitions 0/472 dead transitions. [2024-06-14 11:39:56,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 472 transitions, 7291 flow [2024-06-14 11:39:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:39:56,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:39:56,815 INFO L175 Difference]: Start difference. First operand has 382 places, 451 transitions, 5583 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:39:56,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 472 transitions, 7291 flow [2024-06-14 11:40:00,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 472 transitions, 7057 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 11:40:00,384 INFO L231 Difference]: Finished difference. Result has 388 places, 451 transitions, 5695 flow [2024-06-14 11:40:00,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5695, PETRI_PLACES=388, PETRI_TRANSITIONS=451} [2024-06-14 11:40:00,385 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-14 11:40:00,385 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 451 transitions, 5695 flow [2024-06-14 11:40:00,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:00,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:00,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:40:00,386 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:00,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash -165528230, now seen corresponding path program 12 times [2024-06-14 11:40:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865517279] [2024-06-14 11:40:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:00,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865517279] [2024-06-14 11:40:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865517279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:00,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:00,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:00,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647743930] [2024-06-14 11:40:00,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:00,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:00,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:00,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:00,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:00,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:00,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 451 transitions, 5695 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:00,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:00,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:00,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:01,331 INFO L124 PetriNetUnfolderBase]: 2415/4261 cut-off events. [2024-06-14 11:40:01,331 INFO L125 PetriNetUnfolderBase]: For 673781/673781 co-relation queries the response was YES. [2024-06-14 11:40:01,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33741 conditions, 4261 events. 2415/4261 cut-off events. For 673781/673781 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28858 event pairs, 454 based on Foata normal form. 1/4259 useless extension candidates. Maximal degree in co-relation 33573. Up to 3690 conditions per place. [2024-06-14 11:40:01,394 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 429 selfloop transitions, 31 changer transitions 0/469 dead transitions. [2024-06-14 11:40:01,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 469 transitions, 6659 flow [2024-06-14 11:40:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 11:40:01,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-14 11:40:01,395 INFO L175 Difference]: Start difference. First operand has 388 places, 451 transitions, 5695 flow. Second operand 8 states and 193 transitions. [2024-06-14 11:40:01,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 469 transitions, 6659 flow [2024-06-14 11:40:04,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 469 transitions, 6299 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:04,863 INFO L231 Difference]: Finished difference. Result has 390 places, 451 transitions, 5403 flow [2024-06-14 11:40:04,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=390, PETRI_TRANSITIONS=451} [2024-06-14 11:40:04,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 11:40:04,863 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 451 transitions, 5403 flow [2024-06-14 11:40:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:04,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:04,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:40:04,864 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:04,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 962266768, now seen corresponding path program 7 times [2024-06-14 11:40:04,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:04,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611273644] [2024-06-14 11:40:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:04,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:04,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611273644] [2024-06-14 11:40:04,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611273644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:04,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:04,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:04,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450301049] [2024-06-14 11:40:04,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:04,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:04,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:05,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:05,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 451 transitions, 5403 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:05,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:05,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:05,828 INFO L124 PetriNetUnfolderBase]: 2441/4304 cut-off events. [2024-06-14 11:40:05,828 INFO L125 PetriNetUnfolderBase]: For 698051/698051 co-relation queries the response was YES. [2024-06-14 11:40:05,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33986 conditions, 4304 events. 2441/4304 cut-off events. For 698051/698051 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29272 event pairs, 455 based on Foata normal form. 1/4301 useless extension candidates. Maximal degree in co-relation 33817. Up to 3689 conditions per place. [2024-06-14 11:40:05,996 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 419 selfloop transitions, 57 changer transitions 0/485 dead transitions. [2024-06-14 11:40:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 485 transitions, 7076 flow [2024-06-14 11:40:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:40:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:40:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-14 11:40:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 11:40:05,997 INFO L175 Difference]: Start difference. First operand has 390 places, 451 transitions, 5403 flow. Second operand 10 states and 240 transitions. [2024-06-14 11:40:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 485 transitions, 7076 flow [2024-06-14 11:40:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 485 transitions, 6984 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:40:09,756 INFO L231 Difference]: Finished difference. Result has 392 places, 463 transitions, 5610 flow [2024-06-14 11:40:09,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5610, PETRI_PLACES=392, PETRI_TRANSITIONS=463} [2024-06-14 11:40:09,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-14 11:40:09,757 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 463 transitions, 5610 flow [2024-06-14 11:40:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:09,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:09,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:09,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:40:09,757 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:09,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1643279140, now seen corresponding path program 8 times [2024-06-14 11:40:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:09,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200869155] [2024-06-14 11:40:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200869155] [2024-06-14 11:40:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200869155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:09,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73593007] [2024-06-14 11:40:09,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:09,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:09,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 463 transitions, 5610 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:09,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:09,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:09,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:10,708 INFO L124 PetriNetUnfolderBase]: 2438/4300 cut-off events. [2024-06-14 11:40:10,709 INFO L125 PetriNetUnfolderBase]: For 701015/701015 co-relation queries the response was YES. [2024-06-14 11:40:10,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33977 conditions, 4300 events. 2438/4300 cut-off events. For 701015/701015 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29291 event pairs, 455 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 33807. Up to 3686 conditions per place. [2024-06-14 11:40:10,773 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 56 changer transitions 0/482 dead transitions. [2024-06-14 11:40:10,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 482 transitions, 6852 flow [2024-06-14 11:40:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:40:10,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:40:10,774 INFO L175 Difference]: Start difference. First operand has 392 places, 463 transitions, 5610 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:40:10,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 482 transitions, 6852 flow [2024-06-14 11:40:14,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 482 transitions, 6765 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 11:40:14,547 INFO L231 Difference]: Finished difference. Result has 398 places, 463 transitions, 5641 flow [2024-06-14 11:40:14,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5641, PETRI_PLACES=398, PETRI_TRANSITIONS=463} [2024-06-14 11:40:14,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 11:40:14,548 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 463 transitions, 5641 flow [2024-06-14 11:40:14,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:14,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:14,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:14,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:40:14,548 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:14,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -856805288, now seen corresponding path program 9 times [2024-06-14 11:40:14,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:14,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506136912] [2024-06-14 11:40:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:14,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:14,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506136912] [2024-06-14 11:40:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506136912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:14,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:14,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:14,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78043183] [2024-06-14 11:40:14,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:14,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:14,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:14,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:14,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:14,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 463 transitions, 5641 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:14,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:14,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:14,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:15,447 INFO L124 PetriNetUnfolderBase]: 2467/4343 cut-off events. [2024-06-14 11:40:15,447 INFO L125 PetriNetUnfolderBase]: For 736163/736163 co-relation queries the response was YES. [2024-06-14 11:40:15,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34827 conditions, 4343 events. 2467/4343 cut-off events. For 736163/736163 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29592 event pairs, 464 based on Foata normal form. 1/4336 useless extension candidates. Maximal degree in co-relation 34655. Up to 3499 conditions per place. [2024-06-14 11:40:15,512 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 322 selfloop transitions, 166 changer transitions 0/497 dead transitions. [2024-06-14 11:40:15,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 497 transitions, 7878 flow [2024-06-14 11:40:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:40:15,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:40:15,514 INFO L175 Difference]: Start difference. First operand has 398 places, 463 transitions, 5641 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:40:15,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 497 transitions, 7878 flow [2024-06-14 11:40:18,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 497 transitions, 7766 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:40:18,563 INFO L231 Difference]: Finished difference. Result has 399 places, 475 transitions, 6068 flow [2024-06-14 11:40:18,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=399, PETRI_TRANSITIONS=475} [2024-06-14 11:40:18,564 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-14 11:40:18,564 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 475 transitions, 6068 flow [2024-06-14 11:40:18,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:18,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:18,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:18,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:40:18,565 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:18,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1955727128, now seen corresponding path program 10 times [2024-06-14 11:40:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:18,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900495835] [2024-06-14 11:40:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:18,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:18,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900495835] [2024-06-14 11:40:18,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900495835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:18,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:18,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:18,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042801708] [2024-06-14 11:40:18,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:18,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:18,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:18,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:18,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:18,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:18,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 475 transitions, 6068 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:18,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:18,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:18,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:19,491 INFO L124 PetriNetUnfolderBase]: 2464/4339 cut-off events. [2024-06-14 11:40:19,492 INFO L125 PetriNetUnfolderBase]: For 740215/740215 co-relation queries the response was YES. [2024-06-14 11:40:19,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35024 conditions, 4339 events. 2464/4339 cut-off events. For 740215/740215 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29559 event pairs, 464 based on Foata normal form. 1/4332 useless extension candidates. Maximal degree in co-relation 34851. Up to 3496 conditions per place. [2024-06-14 11:40:19,553 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 323 selfloop transitions, 165 changer transitions 0/497 dead transitions. [2024-06-14 11:40:19,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 497 transitions, 8112 flow [2024-06-14 11:40:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:40:19,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:40:19,555 INFO L175 Difference]: Start difference. First operand has 399 places, 475 transitions, 6068 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:40:19,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 497 transitions, 8112 flow [2024-06-14 11:40:22,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 497 transitions, 7888 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-14 11:40:22,647 INFO L231 Difference]: Finished difference. Result has 405 places, 475 transitions, 6180 flow [2024-06-14 11:40:22,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6180, PETRI_PLACES=405, PETRI_TRANSITIONS=475} [2024-06-14 11:40:22,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-14 11:40:22,648 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 475 transitions, 6180 flow [2024-06-14 11:40:22,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:22,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:22,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:40:22,649 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2053694828, now seen corresponding path program 11 times [2024-06-14 11:40:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:22,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836988981] [2024-06-14 11:40:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836988981] [2024-06-14 11:40:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836988981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220343885] [2024-06-14 11:40:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 475 transitions, 6180 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:22,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:22,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:23,559 INFO L124 PetriNetUnfolderBase]: 2461/4335 cut-off events. [2024-06-14 11:40:23,559 INFO L125 PetriNetUnfolderBase]: For 744240/744240 co-relation queries the response was YES. [2024-06-14 11:40:23,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34955 conditions, 4335 events. 2461/4335 cut-off events. For 744240/744240 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29542 event pairs, 464 based on Foata normal form. 1/4328 useless extension candidates. Maximal degree in co-relation 34781. Up to 3493 conditions per place. [2024-06-14 11:40:23,725 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 314 selfloop transitions, 173 changer transitions 0/496 dead transitions. [2024-06-14 11:40:23,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 496 transitions, 7972 flow [2024-06-14 11:40:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:40:23,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:40:23,726 INFO L175 Difference]: Start difference. First operand has 405 places, 475 transitions, 6180 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:40:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 496 transitions, 7972 flow [2024-06-14 11:40:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 496 transitions, 7676 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:27,255 INFO L231 Difference]: Finished difference. Result has 408 places, 475 transitions, 6236 flow [2024-06-14 11:40:27,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6236, PETRI_PLACES=408, PETRI_TRANSITIONS=475} [2024-06-14 11:40:27,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-14 11:40:27,256 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 475 transitions, 6236 flow [2024-06-14 11:40:27,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:27,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:27,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:40:27,257 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:27,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2058456428, now seen corresponding path program 12 times [2024-06-14 11:40:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568799653] [2024-06-14 11:40:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:27,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:27,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568799653] [2024-06-14 11:40:27,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568799653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:27,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:27,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274781044] [2024-06-14 11:40:27,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:27,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:27,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:27,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:27,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 475 transitions, 6236 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:27,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:27,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:27,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:28,206 INFO L124 PetriNetUnfolderBase]: 2458/4336 cut-off events. [2024-06-14 11:40:28,206 INFO L125 PetriNetUnfolderBase]: For 747071/747071 co-relation queries the response was YES. [2024-06-14 11:40:28,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34900 conditions, 4336 events. 2458/4336 cut-off events. For 747071/747071 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29576 event pairs, 455 based on Foata normal form. 1/4333 useless extension candidates. Maximal degree in co-relation 34725. Up to 3724 conditions per place. [2024-06-14 11:40:28,270 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 435 selfloop transitions, 49 changer transitions 0/493 dead transitions. [2024-06-14 11:40:28,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 493 transitions, 7248 flow [2024-06-14 11:40:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:40:28,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 11:40:28,272 INFO L175 Difference]: Start difference. First operand has 408 places, 475 transitions, 6236 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:40:28,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 493 transitions, 7248 flow [2024-06-14 11:40:31,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 493 transitions, 6886 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:31,800 INFO L231 Difference]: Finished difference. Result has 410 places, 475 transitions, 5978 flow [2024-06-14 11:40:31,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5978, PETRI_PLACES=410, PETRI_TRANSITIONS=475} [2024-06-14 11:40:31,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-14 11:40:31,800 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 475 transitions, 5978 flow [2024-06-14 11:40:31,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:31,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:31,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:31,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:40:31,801 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:31,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1997498636, now seen corresponding path program 3 times [2024-06-14 11:40:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814541966] [2024-06-14 11:40:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814541966] [2024-06-14 11:40:31,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814541966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:31,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:31,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:31,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510775193] [2024-06-14 11:40:31,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:31,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:31,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 475 transitions, 5978 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:31,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:31,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:31,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:32,732 INFO L124 PetriNetUnfolderBase]: 2478/4370 cut-off events. [2024-06-14 11:40:32,733 INFO L125 PetriNetUnfolderBase]: For 799778/799778 co-relation queries the response was YES. [2024-06-14 11:40:32,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34936 conditions, 4370 events. 2478/4370 cut-off events. For 799778/799778 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 29828 event pairs, 453 based on Foata normal form. 6/4372 useless extension candidates. Maximal degree in co-relation 34760. Up to 3693 conditions per place. [2024-06-14 11:40:32,800 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 444 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-14 11:40:32,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 501 transitions, 7106 flow [2024-06-14 11:40:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:40:32,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 11:40:32,801 INFO L175 Difference]: Start difference. First operand has 410 places, 475 transitions, 5978 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:40:32,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 501 transitions, 7106 flow [2024-06-14 11:40:37,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 501 transitions, 6928 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 11:40:37,139 INFO L231 Difference]: Finished difference. Result has 409 places, 476 transitions, 5932 flow [2024-06-14 11:40:37,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5932, PETRI_PLACES=409, PETRI_TRANSITIONS=476} [2024-06-14 11:40:37,140 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-14 11:40:37,140 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 476 transitions, 5932 flow [2024-06-14 11:40:37,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:37,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:37,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:40:37,141 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:37,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash 579643988, now seen corresponding path program 1 times [2024-06-14 11:40:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:37,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006410407] [2024-06-14 11:40:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:37,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:37,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006410407] [2024-06-14 11:40:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006410407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:37,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617066489] [2024-06-14 11:40:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:37,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:37,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 476 transitions, 5932 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:37,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:37,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:37,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:38,112 INFO L124 PetriNetUnfolderBase]: 2499/4392 cut-off events. [2024-06-14 11:40:38,112 INFO L125 PetriNetUnfolderBase]: For 796237/796237 co-relation queries the response was YES. [2024-06-14 11:40:38,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35576 conditions, 4392 events. 2499/4392 cut-off events. For 796237/796237 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29945 event pairs, 457 based on Foata normal form. 2/4386 useless extension candidates. Maximal degree in co-relation 35399. Up to 3751 conditions per place. [2024-06-14 11:40:38,178 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 468 selfloop transitions, 34 changer transitions 0/511 dead transitions. [2024-06-14 11:40:38,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 511 transitions, 7366 flow [2024-06-14 11:40:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:40:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:40:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 11:40:38,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-14 11:40:38,180 INFO L175 Difference]: Start difference. First operand has 409 places, 476 transitions, 5932 flow. Second operand 9 states and 224 transitions. [2024-06-14 11:40:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 511 transitions, 7366 flow [2024-06-14 11:40:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 511 transitions, 7250 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:41,355 INFO L231 Difference]: Finished difference. Result has 412 places, 480 transitions, 5985 flow [2024-06-14 11:40:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5985, PETRI_PLACES=412, PETRI_TRANSITIONS=480} [2024-06-14 11:40:41,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 11:40:41,355 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 480 transitions, 5985 flow [2024-06-14 11:40:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:41,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:40:41,356 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:41,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 582500948, now seen corresponding path program 2 times [2024-06-14 11:40:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611664468] [2024-06-14 11:40:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:41,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:41,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611664468] [2024-06-14 11:40:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611664468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:41,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:41,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902209866] [2024-06-14 11:40:41,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:41,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:41,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:41,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:41,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 480 transitions, 5985 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:41,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:41,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:41,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:42,396 INFO L124 PetriNetUnfolderBase]: 2494/4392 cut-off events. [2024-06-14 11:40:42,396 INFO L125 PetriNetUnfolderBase]: For 789072/789072 co-relation queries the response was YES. [2024-06-14 11:40:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35298 conditions, 4392 events. 2494/4392 cut-off events. For 789072/789072 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 30031 event pairs, 465 based on Foata normal form. 2/4388 useless extension candidates. Maximal degree in co-relation 35121. Up to 3773 conditions per place. [2024-06-14 11:40:42,457 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 466 selfloop transitions, 30 changer transitions 0/505 dead transitions. [2024-06-14 11:40:42,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 505 transitions, 7039 flow [2024-06-14 11:40:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:40:42,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:40:42,459 INFO L175 Difference]: Start difference. First operand has 412 places, 480 transitions, 5985 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:40:42,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 505 transitions, 7039 flow [2024-06-14 11:40:46,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 505 transitions, 6923 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 11:40:46,819 INFO L231 Difference]: Finished difference. Result has 415 places, 480 transitions, 5934 flow [2024-06-14 11:40:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5934, PETRI_PLACES=415, PETRI_TRANSITIONS=480} [2024-06-14 11:40:46,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-14 11:40:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 480 transitions, 5934 flow [2024-06-14 11:40:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:40:46,821 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1707001880, now seen corresponding path program 3 times [2024-06-14 11:40:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:46,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866970231] [2024-06-14 11:40:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866970231] [2024-06-14 11:40:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866970231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:46,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:46,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690745442] [2024-06-14 11:40:46,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:46,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:46,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 480 transitions, 5934 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:46,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:46,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:46,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:47,806 INFO L124 PetriNetUnfolderBase]: 2502/4401 cut-off events. [2024-06-14 11:40:47,807 INFO L125 PetriNetUnfolderBase]: For 800936/800936 co-relation queries the response was YES. [2024-06-14 11:40:47,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 4401 events. 2502/4401 cut-off events. For 800936/800936 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30066 event pairs, 471 based on Foata normal form. 2/4394 useless extension candidates. Maximal degree in co-relation 35245. Up to 3710 conditions per place. [2024-06-14 11:40:47,875 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 406 selfloop transitions, 89 changer transitions 0/504 dead transitions. [2024-06-14 11:40:47,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 504 transitions, 7028 flow [2024-06-14 11:40:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:40:47,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 11:40:47,876 INFO L175 Difference]: Start difference. First operand has 415 places, 480 transitions, 5934 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:40:47,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 504 transitions, 7028 flow [2024-06-14 11:40:51,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 504 transitions, 6963 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:40:51,756 INFO L231 Difference]: Finished difference. Result has 416 places, 482 transitions, 6106 flow [2024-06-14 11:40:51,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6106, PETRI_PLACES=416, PETRI_TRANSITIONS=482} [2024-06-14 11:40:51,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-14 11:40:51,757 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 482 transitions, 6106 flow [2024-06-14 11:40:51,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:51,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:51,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:51,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:40:51,758 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 582505908, now seen corresponding path program 1 times [2024-06-14 11:40:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:51,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901440079] [2024-06-14 11:40:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:51,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901440079] [2024-06-14 11:40:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901440079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:51,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264230746] [2024-06-14 11:40:51,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:51,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:51,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:51,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:51,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 482 transitions, 6106 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:51,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:51,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:51,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:52,840 INFO L124 PetriNetUnfolderBase]: 2507/4413 cut-off events. [2024-06-14 11:40:52,841 INFO L125 PetriNetUnfolderBase]: For 804591/804591 co-relation queries the response was YES. [2024-06-14 11:40:52,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35811 conditions, 4413 events. 2507/4413 cut-off events. For 804591/804591 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30181 event pairs, 464 based on Foata normal form. 1/4408 useless extension candidates. Maximal degree in co-relation 35631. Up to 3795 conditions per place. [2024-06-14 11:40:52,912 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 469 selfloop transitions, 31 changer transitions 0/509 dead transitions. [2024-06-14 11:40:52,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 509 transitions, 7234 flow [2024-06-14 11:40:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:40:52,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:40:52,913 INFO L175 Difference]: Start difference. First operand has 416 places, 482 transitions, 6106 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:40:52,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 509 transitions, 7234 flow [2024-06-14 11:40:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 509 transitions, 7013 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:57,125 INFO L231 Difference]: Finished difference. Result has 418 places, 485 transitions, 6027 flow [2024-06-14 11:40:57,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6027, PETRI_PLACES=418, PETRI_TRANSITIONS=485} [2024-06-14 11:40:57,126 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-14 11:40:57,126 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 485 transitions, 6027 flow [2024-06-14 11:40:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:57,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:57,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:40:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:40:57,127 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:57,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash 863436212, now seen corresponding path program 2 times [2024-06-14 11:40:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082418119] [2024-06-14 11:40:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:57,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082418119] [2024-06-14 11:40:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082418119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123146960] [2024-06-14 11:40:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:57,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:40:57,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 485 transitions, 6027 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:40:57,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:57,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:40:57,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:58,099 INFO L124 PetriNetUnfolderBase]: 2528/4442 cut-off events. [2024-06-14 11:40:58,099 INFO L125 PetriNetUnfolderBase]: For 834777/834777 co-relation queries the response was YES. [2024-06-14 11:40:58,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 4442 events. 2528/4442 cut-off events. For 834777/834777 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30421 event pairs, 477 based on Foata normal form. 1/4431 useless extension candidates. Maximal degree in co-relation 36401. Up to 3618 conditions per place. [2024-06-14 11:40:58,170 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 384 selfloop transitions, 128 changer transitions 0/521 dead transitions. [2024-06-14 11:40:58,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 521 transitions, 8215 flow [2024-06-14 11:40:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:40:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:40:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 11:40:58,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 11:40:58,171 INFO L175 Difference]: Start difference. First operand has 418 places, 485 transitions, 6027 flow. Second operand 8 states and 209 transitions. [2024-06-14 11:40:58,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 521 transitions, 8215 flow [2024-06-14 11:41:02,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 521 transitions, 8095 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:02,473 INFO L231 Difference]: Finished difference. Result has 420 places, 497 transitions, 6471 flow [2024-06-14 11:41:02,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6471, PETRI_PLACES=420, PETRI_TRANSITIONS=497} [2024-06-14 11:41:02,474 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-14 11:41:02,474 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 497 transitions, 6471 flow [2024-06-14 11:41:02,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:02,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:02,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:41:02,475 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:02,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash 870102452, now seen corresponding path program 3 times [2024-06-14 11:41:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153927146] [2024-06-14 11:41:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:02,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:02,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153927146] [2024-06-14 11:41:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153927146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:02,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:02,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:02,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68909951] [2024-06-14 11:41:02,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:02,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:02,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:02,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:02,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:02,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 497 transitions, 6471 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:02,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:02,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:02,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:03,452 INFO L124 PetriNetUnfolderBase]: 2525/4438 cut-off events. [2024-06-14 11:41:03,452 INFO L125 PetriNetUnfolderBase]: For 840860/840860 co-relation queries the response was YES. [2024-06-14 11:41:03,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36912 conditions, 4438 events. 2525/4438 cut-off events. For 840860/840860 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30399 event pairs, 477 based on Foata normal form. 1/4427 useless extension candidates. Maximal degree in co-relation 36730. Up to 3615 conditions per place. [2024-06-14 11:41:03,527 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 382 selfloop transitions, 129 changer transitions 0/520 dead transitions. [2024-06-14 11:41:03,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 520 transitions, 8093 flow [2024-06-14 11:41:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:41:03,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:41:03,529 INFO L175 Difference]: Start difference. First operand has 420 places, 497 transitions, 6471 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:41:03,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 520 transitions, 8093 flow [2024-06-14 11:41:07,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 520 transitions, 7902 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-14 11:41:07,841 INFO L231 Difference]: Finished difference. Result has 426 places, 497 transitions, 6544 flow [2024-06-14 11:41:07,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6544, PETRI_PLACES=426, PETRI_TRANSITIONS=497} [2024-06-14 11:41:07,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 11:41:07,842 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 497 transitions, 6544 flow [2024-06-14 11:41:07,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:07,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:07,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:07,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:41:07,843 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:07,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:07,843 INFO L85 PathProgramCache]: Analyzing trace with hash 870111380, now seen corresponding path program 1 times [2024-06-14 11:41:07,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:07,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945226489] [2024-06-14 11:41:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945226489] [2024-06-14 11:41:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945226489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748714658] [2024-06-14 11:41:07,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:08,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:08,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 497 transitions, 6544 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:08,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:08,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:08,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:08,942 INFO L124 PetriNetUnfolderBase]: 2533/4455 cut-off events. [2024-06-14 11:41:08,943 INFO L125 PetriNetUnfolderBase]: For 862419/862419 co-relation queries the response was YES. [2024-06-14 11:41:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37287 conditions, 4455 events. 2533/4455 cut-off events. For 862419/862419 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30545 event pairs, 467 based on Foata normal form. 2/4449 useless extension candidates. Maximal degree in co-relation 37103. Up to 3778 conditions per place. [2024-06-14 11:41:09,014 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 421 selfloop transitions, 91 changer transitions 0/521 dead transitions. [2024-06-14 11:41:09,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 521 transitions, 7678 flow [2024-06-14 11:41:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:41:09,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:41:09,015 INFO L175 Difference]: Start difference. First operand has 426 places, 497 transitions, 6544 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:41:09,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 521 transitions, 7678 flow [2024-06-14 11:41:14,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 521 transitions, 7480 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:14,014 INFO L231 Difference]: Finished difference. Result has 428 places, 499 transitions, 6593 flow [2024-06-14 11:41:14,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6346, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6593, PETRI_PLACES=428, PETRI_TRANSITIONS=499} [2024-06-14 11:41:14,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-14 11:41:14,014 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 499 transitions, 6593 flow [2024-06-14 11:41:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:41:14,015 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:14,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:14,015 INFO L85 PathProgramCache]: Analyzing trace with hash -877509002, now seen corresponding path program 4 times [2024-06-14 11:41:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778965320] [2024-06-14 11:41:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778965320] [2024-06-14 11:41:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778965320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:14,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:14,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726113971] [2024-06-14 11:41:14,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:14,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:14,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:14,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:14,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 499 transitions, 6593 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:14,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:14,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:14,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:15,116 INFO L124 PetriNetUnfolderBase]: 2541/4469 cut-off events. [2024-06-14 11:41:15,116 INFO L125 PetriNetUnfolderBase]: For 875568/875568 co-relation queries the response was YES. [2024-06-14 11:41:15,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37560 conditions, 4469 events. 2541/4469 cut-off events. For 875568/875568 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30660 event pairs, 472 based on Foata normal form. 2/4462 useless extension candidates. Maximal degree in co-relation 37375. Up to 3766 conditions per place. [2024-06-14 11:41:15,180 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 420 selfloop transitions, 91 changer transitions 0/520 dead transitions. [2024-06-14 11:41:15,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 520 transitions, 7721 flow [2024-06-14 11:41:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:41:15,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:41:15,182 INFO L175 Difference]: Start difference. First operand has 428 places, 499 transitions, 6593 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:41:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 520 transitions, 7721 flow [2024-06-14 11:41:20,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 520 transitions, 7490 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:20,556 INFO L231 Difference]: Finished difference. Result has 430 places, 501 transitions, 6613 flow [2024-06-14 11:41:20,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6613, PETRI_PLACES=430, PETRI_TRANSITIONS=501} [2024-06-14 11:41:20,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-14 11:41:20,557 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 501 transitions, 6613 flow [2024-06-14 11:41:20,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:20,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:20,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:20,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:41:20,558 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:20,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:20,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1700368972, now seen corresponding path program 4 times [2024-06-14 11:41:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:20,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213054923] [2024-06-14 11:41:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:20,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213054923] [2024-06-14 11:41:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213054923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:20,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:20,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899916437] [2024-06-14 11:41:20,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:20,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:20,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:20,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 501 transitions, 6613 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:20,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:20,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:21,594 INFO L124 PetriNetUnfolderBase]: 2570/4514 cut-off events. [2024-06-14 11:41:21,594 INFO L125 PetriNetUnfolderBase]: For 908533/908533 co-relation queries the response was YES. [2024-06-14 11:41:21,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38520 conditions, 4514 events. 2570/4514 cut-off events. For 908533/908533 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 31023 event pairs, 479 based on Foata normal form. 1/4503 useless extension candidates. Maximal degree in co-relation 38334. Up to 3672 conditions per place. [2024-06-14 11:41:21,669 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 140 changer transitions 0/535 dead transitions. [2024-06-14 11:41:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 535 transitions, 9110 flow [2024-06-14 11:41:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:41:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:41:21,671 INFO L175 Difference]: Start difference. First operand has 430 places, 501 transitions, 6613 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:41:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 535 transitions, 9110 flow [2024-06-14 11:41:27,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 535 transitions, 8875 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:41:27,547 INFO L231 Difference]: Finished difference. Result has 432 places, 513 transitions, 6945 flow [2024-06-14 11:41:27,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6945, PETRI_PLACES=432, PETRI_TRANSITIONS=513} [2024-06-14 11:41:27,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-14 11:41:27,547 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 513 transitions, 6945 flow [2024-06-14 11:41:27,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:27,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:27,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:41:27,548 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:27,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1707035212, now seen corresponding path program 5 times [2024-06-14 11:41:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:27,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633939076] [2024-06-14 11:41:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:27,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633939076] [2024-06-14 11:41:27,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633939076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:27,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:27,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828707529] [2024-06-14 11:41:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:27,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:27,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:27,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 513 transitions, 6945 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:27,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:27,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:27,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:28,589 INFO L124 PetriNetUnfolderBase]: 2567/4510 cut-off events. [2024-06-14 11:41:28,589 INFO L125 PetriNetUnfolderBase]: For 910880/910880 co-relation queries the response was YES. [2024-06-14 11:41:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38432 conditions, 4510 events. 2567/4510 cut-off events. For 910880/910880 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30976 event pairs, 479 based on Foata normal form. 1/4499 useless extension candidates. Maximal degree in co-relation 38245. Up to 3669 conditions per place. [2024-06-14 11:41:28,665 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 384 selfloop transitions, 141 changer transitions 0/534 dead transitions. [2024-06-14 11:41:28,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 534 transitions, 8885 flow [2024-06-14 11:41:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:41:28,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-14 11:41:28,667 INFO L175 Difference]: Start difference. First operand has 432 places, 513 transitions, 6945 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:41:28,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 534 transitions, 8885 flow [2024-06-14 11:41:34,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 534 transitions, 8621 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-14 11:41:34,283 INFO L231 Difference]: Finished difference. Result has 438 places, 513 transitions, 6969 flow [2024-06-14 11:41:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=438, PETRI_TRANSITIONS=513} [2024-06-14 11:41:34,283 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-14 11:41:34,283 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 513 transitions, 6969 flow [2024-06-14 11:41:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:41:34,284 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:34,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2053687884, now seen corresponding path program 6 times [2024-06-14 11:41:34,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:34,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782337336] [2024-06-14 11:41:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:34,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:34,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782337336] [2024-06-14 11:41:34,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782337336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:34,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:34,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:34,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923502354] [2024-06-14 11:41:34,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:34,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:34,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:34,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:34,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 513 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:34,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:34,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:34,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:35,293 INFO L124 PetriNetUnfolderBase]: 2564/4506 cut-off events. [2024-06-14 11:41:35,293 INFO L125 PetriNetUnfolderBase]: For 913670/913670 co-relation queries the response was YES. [2024-06-14 11:41:35,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38288 conditions, 4506 events. 2564/4506 cut-off events. For 913670/913670 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30955 event pairs, 479 based on Foata normal form. 1/4495 useless extension candidates. Maximal degree in co-relation 38100. Up to 3666 conditions per place. [2024-06-14 11:41:35,370 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 147 changer transitions 0/533 dead transitions. [2024-06-14 11:41:35,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 533 transitions, 8629 flow [2024-06-14 11:41:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:41:35,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-14 11:41:35,372 INFO L175 Difference]: Start difference. First operand has 438 places, 513 transitions, 6969 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:41:35,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 533 transitions, 8629 flow [2024-06-14 11:41:40,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 533 transitions, 8234 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 11:41:40,349 INFO L231 Difference]: Finished difference. Result has 439 places, 513 transitions, 6874 flow [2024-06-14 11:41:40,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6874, PETRI_PLACES=439, PETRI_TRANSITIONS=513} [2024-06-14 11:41:40,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-14 11:41:40,349 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 513 transitions, 6874 flow [2024-06-14 11:41:40,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:40,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:40,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:40,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:41:40,350 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:40,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1700360044, now seen corresponding path program 2 times [2024-06-14 11:41:40,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:40,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837926496] [2024-06-14 11:41:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:40,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:40,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837926496] [2024-06-14 11:41:40,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837926496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:40,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:40,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104435671] [2024-06-14 11:41:40,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:40,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:40,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:40,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 513 transitions, 6874 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:40,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:40,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:40,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:41,408 INFO L124 PetriNetUnfolderBase]: 2572/4523 cut-off events. [2024-06-14 11:41:41,408 INFO L125 PetriNetUnfolderBase]: For 935590/935590 co-relation queries the response was YES. [2024-06-14 11:41:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38450 conditions, 4523 events. 2572/4523 cut-off events. For 935590/935590 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31082 event pairs, 469 based on Foata normal form. 2/4517 useless extension candidates. Maximal degree in co-relation 38261. Up to 3834 conditions per place. [2024-06-14 11:41:41,483 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 89 changer transitions 0/534 dead transitions. [2024-06-14 11:41:41,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 534 transitions, 8032 flow [2024-06-14 11:41:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:41:41,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:41:41,484 INFO L175 Difference]: Start difference. First operand has 439 places, 513 transitions, 6874 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:41:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 534 transitions, 8032 flow [2024-06-14 11:41:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 534 transitions, 7737 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:41:47,604 INFO L231 Difference]: Finished difference. Result has 440 places, 515 transitions, 6828 flow [2024-06-14 11:41:47,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6828, PETRI_PLACES=440, PETRI_TRANSITIONS=515} [2024-06-14 11:41:47,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-14 11:41:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 515 transitions, 6828 flow [2024-06-14 11:41:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:47,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:47,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:47,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:41:47,605 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:47,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2053678956, now seen corresponding path program 3 times [2024-06-14 11:41:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699657021] [2024-06-14 11:41:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699657021] [2024-06-14 11:41:47,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699657021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801304501] [2024-06-14 11:41:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:47,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:47,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 515 transitions, 6828 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:47,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:47,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:48,768 INFO L124 PetriNetUnfolderBase]: 2580/4539 cut-off events. [2024-06-14 11:41:48,768 INFO L125 PetriNetUnfolderBase]: For 948142/948142 co-relation queries the response was YES. [2024-06-14 11:41:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38647 conditions, 4539 events. 2580/4539 cut-off events. For 948142/948142 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 31242 event pairs, 471 based on Foata normal form. 2/4533 useless extension candidates. Maximal degree in co-relation 38457. Up to 3846 conditions per place. [2024-06-14 11:41:48,835 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 436 selfloop transitions, 91 changer transitions 0/536 dead transitions. [2024-06-14 11:41:48,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 536 transitions, 7994 flow [2024-06-14 11:41:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:41:48,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:41:48,837 INFO L175 Difference]: Start difference. First operand has 440 places, 515 transitions, 6828 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:41:48,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 536 transitions, 7994 flow [2024-06-14 11:41:55,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 536 transitions, 7779 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:41:55,422 INFO L231 Difference]: Finished difference. Result has 443 places, 517 transitions, 6870 flow [2024-06-14 11:41:55,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6870, PETRI_PLACES=443, PETRI_TRANSITIONS=517} [2024-06-14 11:41:55,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-14 11:41:55,423 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 517 transitions, 6870 flow [2024-06-14 11:41:55,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:55,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:41:55,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:41:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:41:55,424 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:41:55,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:41:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2043203436, now seen corresponding path program 4 times [2024-06-14 11:41:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:41:55,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169815071] [2024-06-14 11:41:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:41:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:41:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:41:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:41:55,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:41:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169815071] [2024-06-14 11:41:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169815071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:41:55,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:41:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:41:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438140485] [2024-06-14 11:41:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:41:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:41:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:41:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:41:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:41:55,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:41:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 517 transitions, 6870 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:41:55,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:41:55,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:41:55,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:41:56,756 INFO L124 PetriNetUnfolderBase]: 2601/4568 cut-off events. [2024-06-14 11:41:56,756 INFO L125 PetriNetUnfolderBase]: For 983546/983546 co-relation queries the response was YES. [2024-06-14 11:41:56,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39414 conditions, 4568 events. 2601/4568 cut-off events. For 983546/983546 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31444 event pairs, 468 based on Foata normal form. 2/4562 useless extension candidates. Maximal degree in co-relation 39223. Up to 3842 conditions per place. [2024-06-14 11:41:56,830 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 435 selfloop transitions, 99 changer transitions 0/543 dead transitions. [2024-06-14 11:41:56,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 543 transitions, 8430 flow [2024-06-14 11:41:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:41:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:41:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:41:56,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:41:56,831 INFO L175 Difference]: Start difference. First operand has 443 places, 517 transitions, 6870 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:41:56,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 543 transitions, 8430 flow [2024-06-14 11:42:02,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 543 transitions, 8189 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:02,234 INFO L231 Difference]: Finished difference. Result has 446 places, 522 transitions, 7006 flow [2024-06-14 11:42:02,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7006, PETRI_PLACES=446, PETRI_TRANSITIONS=522} [2024-06-14 11:42:02,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-14 11:42:02,235 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 522 transitions, 7006 flow [2024-06-14 11:42:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:02,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:02,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:02,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:42:02,235 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:02,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash -473431596, now seen corresponding path program 13 times [2024-06-14 11:42:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:02,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112921503] [2024-06-14 11:42:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112921503] [2024-06-14 11:42:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112921503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:02,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:02,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885567926] [2024-06-14 11:42:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:02,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:02,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 522 transitions, 7006 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:02,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:02,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:03,467 INFO L124 PetriNetUnfolderBase]: 2609/4575 cut-off events. [2024-06-14 11:42:03,467 INFO L125 PetriNetUnfolderBase]: For 999993/999993 co-relation queries the response was YES. [2024-06-14 11:42:03,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39729 conditions, 4575 events. 2609/4575 cut-off events. For 999993/999993 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 31458 event pairs, 474 based on Foata normal form. 2/4561 useless extension candidates. Maximal degree in co-relation 39536. Up to 3824 conditions per place. [2024-06-14 11:42:03,533 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 452 selfloop transitions, 93 changer transitions 0/554 dead transitions. [2024-06-14 11:42:03,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 554 transitions, 8606 flow [2024-06-14 11:42:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 11:42:03,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-14 11:42:03,534 INFO L175 Difference]: Start difference. First operand has 446 places, 522 transitions, 7006 flow. Second operand 8 states and 205 transitions. [2024-06-14 11:42:03,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 554 transitions, 8606 flow [2024-06-14 11:42:09,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 554 transitions, 8400 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:09,827 INFO L231 Difference]: Finished difference. Result has 451 places, 527 transitions, 7159 flow [2024-06-14 11:42:09,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7159, PETRI_PLACES=451, PETRI_TRANSITIONS=527} [2024-06-14 11:42:09,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-14 11:42:09,828 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 527 transitions, 7159 flow [2024-06-14 11:42:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:09,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:09,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 11:42:09,829 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:09,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2142655508, now seen corresponding path program 14 times [2024-06-14 11:42:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:09,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330327665] [2024-06-14 11:42:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330327665] [2024-06-14 11:42:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330327665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:09,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:09,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897427947] [2024-06-14 11:42:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:09,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:10,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:10,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 527 transitions, 7159 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:10,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:10,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:10,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:11,215 INFO L124 PetriNetUnfolderBase]: 2617/4592 cut-off events. [2024-06-14 11:42:11,215 INFO L125 PetriNetUnfolderBase]: For 1014267/1014267 co-relation queries the response was YES. [2024-06-14 11:42:11,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40072 conditions, 4592 events. 2617/4592 cut-off events. For 1014267/1014267 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31608 event pairs, 481 based on Foata normal form. 2/4583 useless extension candidates. Maximal degree in co-relation 39876. Up to 3871 conditions per place. [2024-06-14 11:42:11,287 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 451 selfloop transitions, 91 changer transitions 0/551 dead transitions. [2024-06-14 11:42:11,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 551 transitions, 8371 flow [2024-06-14 11:42:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:42:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:42:11,288 INFO L175 Difference]: Start difference. First operand has 451 places, 527 transitions, 7159 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:42:11,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 551 transitions, 8371 flow [2024-06-14 11:42:17,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 551 transitions, 8115 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 11:42:17,315 INFO L231 Difference]: Finished difference. Result has 455 places, 529 transitions, 7168 flow [2024-06-14 11:42:17,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7168, PETRI_PLACES=455, PETRI_TRANSITIONS=529} [2024-06-14 11:42:17,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 11:42:17,316 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 529 transitions, 7168 flow [2024-06-14 11:42:17,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:17,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:17,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 11:42:17,317 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:17,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash 239907860, now seen corresponding path program 15 times [2024-06-14 11:42:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:17,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184980882] [2024-06-14 11:42:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184980882] [2024-06-14 11:42:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184980882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:17,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609031037] [2024-06-14 11:42:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:17,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:17,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:17,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 529 transitions, 7168 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:17,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:17,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:17,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:18,650 INFO L124 PetriNetUnfolderBase]: 2625/4604 cut-off events. [2024-06-14 11:42:18,650 INFO L125 PetriNetUnfolderBase]: For 1023707/1023707 co-relation queries the response was YES. [2024-06-14 11:42:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40029 conditions, 4604 events. 2625/4604 cut-off events. For 1023707/1023707 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31680 event pairs, 481 based on Foata normal form. 2/4595 useless extension candidates. Maximal degree in co-relation 39831. Up to 3883 conditions per place. [2024-06-14 11:42:18,731 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 452 selfloop transitions, 89 changer transitions 0/550 dead transitions. [2024-06-14 11:42:18,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 550 transitions, 8334 flow [2024-06-14 11:42:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:42:18,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:42:18,733 INFO L175 Difference]: Start difference. First operand has 455 places, 529 transitions, 7168 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:42:18,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 550 transitions, 8334 flow [2024-06-14 11:42:23,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 550 transitions, 8131 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:23,658 INFO L231 Difference]: Finished difference. Result has 457 places, 531 transitions, 7190 flow [2024-06-14 11:42:23,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7190, PETRI_PLACES=457, PETRI_TRANSITIONS=531} [2024-06-14 11:42:23,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 412 predicate places. [2024-06-14 11:42:23,659 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 531 transitions, 7190 flow [2024-06-14 11:42:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:23,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:23,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 11:42:23,659 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:23,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2026482646, now seen corresponding path program 16 times [2024-06-14 11:42:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549521797] [2024-06-14 11:42:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:23,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:23,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549521797] [2024-06-14 11:42:23,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549521797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:23,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:23,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:23,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869649235] [2024-06-14 11:42:23,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:23,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:23,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 531 transitions, 7190 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:25,071 INFO L124 PetriNetUnfolderBase]: 2633/4616 cut-off events. [2024-06-14 11:42:25,072 INFO L125 PetriNetUnfolderBase]: For 1037194/1037194 co-relation queries the response was YES. [2024-06-14 11:42:25,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40199 conditions, 4616 events. 2633/4616 cut-off events. For 1037194/1037194 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31796 event pairs, 481 based on Foata normal form. 2/4607 useless extension candidates. Maximal degree in co-relation 40000. Up to 3895 conditions per place. [2024-06-14 11:42:25,147 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 449 selfloop transitions, 91 changer transitions 0/549 dead transitions. [2024-06-14 11:42:25,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 549 transitions, 8350 flow [2024-06-14 11:42:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:42:25,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 11:42:25,148 INFO L175 Difference]: Start difference. First operand has 457 places, 531 transitions, 7190 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:42:25,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 549 transitions, 8350 flow [2024-06-14 11:42:30,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 549 transitions, 8147 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:30,829 INFO L231 Difference]: Finished difference. Result has 459 places, 533 transitions, 7220 flow [2024-06-14 11:42:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7220, PETRI_PLACES=459, PETRI_TRANSITIONS=533} [2024-06-14 11:42:30,829 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 414 predicate places. [2024-06-14 11:42:30,829 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 533 transitions, 7220 flow [2024-06-14 11:42:30,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:30,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:30,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 11:42:30,830 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:30,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 308180662, now seen corresponding path program 17 times [2024-06-14 11:42:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:30,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520599529] [2024-06-14 11:42:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:30,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520599529] [2024-06-14 11:42:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520599529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:30,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431012872] [2024-06-14 11:42:30,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:30,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:30,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:31,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:31,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 533 transitions, 7220 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:31,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:31,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:31,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:32,253 INFO L124 PetriNetUnfolderBase]: 2628/4601 cut-off events. [2024-06-14 11:42:32,253 INFO L125 PetriNetUnfolderBase]: For 1028731/1028731 co-relation queries the response was YES. [2024-06-14 11:42:32,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39901 conditions, 4601 events. 2628/4601 cut-off events. For 1028731/1028731 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31682 event pairs, 498 based on Foata normal form. 2/4589 useless extension candidates. Maximal degree in co-relation 39701. Up to 3888 conditions per place. [2024-06-14 11:42:32,326 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 447 selfloop transitions, 91 changer transitions 0/547 dead transitions. [2024-06-14 11:42:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 547 transitions, 8351 flow [2024-06-14 11:42:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:42:32,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-14 11:42:32,327 INFO L175 Difference]: Start difference. First operand has 459 places, 533 transitions, 7220 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:42:32,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 547 transitions, 8351 flow [2024-06-14 11:42:39,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 547 transitions, 8096 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:39,529 INFO L231 Difference]: Finished difference. Result has 461 places, 534 transitions, 7179 flow [2024-06-14 11:42:39,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6979, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7179, PETRI_PLACES=461, PETRI_TRANSITIONS=534} [2024-06-14 11:42:39,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-14 11:42:39,530 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 534 transitions, 7179 flow [2024-06-14 11:42:39,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:39,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 11:42:39,531 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:39,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1347560468, now seen corresponding path program 18 times [2024-06-14 11:42:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097330380] [2024-06-14 11:42:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:39,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097330380] [2024-06-14 11:42:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097330380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:39,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:39,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:39,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254724310] [2024-06-14 11:42:39,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:39,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 534 transitions, 7179 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:39,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:39,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:40,889 INFO L124 PetriNetUnfolderBase]: 2623/4594 cut-off events. [2024-06-14 11:42:40,890 INFO L125 PetriNetUnfolderBase]: For 1017953/1017953 co-relation queries the response was YES. [2024-06-14 11:42:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39459 conditions, 4594 events. 2623/4594 cut-off events. For 1017953/1017953 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31613 event pairs, 497 based on Foata normal form. 2/4582 useless extension candidates. Maximal degree in co-relation 39258. Up to 3881 conditions per place. [2024-06-14 11:42:40,966 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 450 selfloop transitions, 89 changer transitions 0/548 dead transitions. [2024-06-14 11:42:40,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 548 transitions, 8306 flow [2024-06-14 11:42:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:42:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 11:42:40,968 INFO L175 Difference]: Start difference. First operand has 461 places, 534 transitions, 7179 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:42:40,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 548 transitions, 8306 flow [2024-06-14 11:42:47,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 548 transitions, 8089 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:47,871 INFO L231 Difference]: Finished difference. Result has 463 places, 535 transitions, 7166 flow [2024-06-14 11:42:47,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6970, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7166, PETRI_PLACES=463, PETRI_TRANSITIONS=535} [2024-06-14 11:42:47,871 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-14 11:42:47,871 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 535 transitions, 7166 flow [2024-06-14 11:42:47,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:47,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:47,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:47,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 11:42:47,872 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:47,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1066630164, now seen corresponding path program 19 times [2024-06-14 11:42:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:47,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455767192] [2024-06-14 11:42:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:47,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:48,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:48,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455767192] [2024-06-14 11:42:48,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455767192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:48,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:48,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:48,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507107787] [2024-06-14 11:42:48,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:48,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:48,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:48,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 535 transitions, 7166 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:48,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:49,240 INFO L124 PetriNetUnfolderBase]: 2618/4598 cut-off events. [2024-06-14 11:42:49,240 INFO L125 PetriNetUnfolderBase]: For 1006857/1006857 co-relation queries the response was YES. [2024-06-14 11:42:49,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39125 conditions, 4598 events. 2618/4598 cut-off events. For 1006857/1006857 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31645 event pairs, 472 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 38923. Up to 3985 conditions per place. [2024-06-14 11:42:49,311 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 510 selfloop transitions, 30 changer transitions 0/549 dead transitions. [2024-06-14 11:42:49,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 549 transitions, 8296 flow [2024-06-14 11:42:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:42:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:42:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:42:49,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 11:42:49,312 INFO L175 Difference]: Start difference. First operand has 463 places, 535 transitions, 7166 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:42:49,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 549 transitions, 8296 flow [2024-06-14 11:42:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 549 transitions, 8085 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 11:42:54,966 INFO L231 Difference]: Finished difference. Result has 465 places, 536 transitions, 7042 flow [2024-06-14 11:42:54,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7042, PETRI_PLACES=465, PETRI_TRANSITIONS=536} [2024-06-14 11:42:54,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-14 11:42:54,967 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 536 transitions, 7042 flow [2024-06-14 11:42:54,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:54,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:42:54,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:42:54,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 11:42:54,968 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:42:54,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:42:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash -173314894, now seen corresponding path program 20 times [2024-06-14 11:42:54,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:42:54,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010560619] [2024-06-14 11:42:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:42:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:42:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:42:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:42:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:42:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010560619] [2024-06-14 11:42:55,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010560619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:42:55,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:42:55,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:42:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457191283] [2024-06-14 11:42:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:42:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:42:55,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:42:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:42:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:42:55,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:42:55,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 536 transitions, 7042 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:42:55,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:42:55,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:42:55,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:42:56,408 INFO L124 PetriNetUnfolderBase]: 2613/4589 cut-off events. [2024-06-14 11:42:56,408 INFO L125 PetriNetUnfolderBase]: For 996005/996005 co-relation queries the response was YES. [2024-06-14 11:42:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38646 conditions, 4589 events. 2613/4589 cut-off events. For 996005/996005 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31643 event pairs, 467 based on Foata normal form. 2/4581 useless extension candidates. Maximal degree in co-relation 38443. Up to 3964 conditions per place. [2024-06-14 11:42:56,510 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 509 selfloop transitions, 34 changer transitions 0/552 dead transitions. [2024-06-14 11:42:56,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 552 transitions, 8181 flow [2024-06-14 11:42:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:42:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:42:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 11:42:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-14 11:42:56,511 INFO L175 Difference]: Start difference. First operand has 465 places, 536 transitions, 7042 flow. Second operand 9 states and 208 transitions. [2024-06-14 11:42:56,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 552 transitions, 8181 flow [2024-06-14 11:43:03,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 552 transitions, 8090 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:43:03,159 INFO L231 Difference]: Finished difference. Result has 468 places, 537 transitions, 7045 flow [2024-06-14 11:43:03,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7045, PETRI_PLACES=468, PETRI_TRANSITIONS=537} [2024-06-14 11:43:03,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 423 predicate places. [2024-06-14 11:43:03,160 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 537 transitions, 7045 flow [2024-06-14 11:43:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:03,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:03,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 11:43:03,161 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:03,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -45779084, now seen corresponding path program 13 times [2024-06-14 11:43:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943121652] [2024-06-14 11:43:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:03,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943121652] [2024-06-14 11:43:03,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943121652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:03,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:03,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:03,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406477457] [2024-06-14 11:43:03,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:03,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:03,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:03,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:03,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 537 transitions, 7045 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:03,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:03,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:03,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:04,519 INFO L124 PetriNetUnfolderBase]: 2645/4647 cut-off events. [2024-06-14 11:43:04,519 INFO L125 PetriNetUnfolderBase]: For 1020439/1020439 co-relation queries the response was YES. [2024-06-14 11:43:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39386 conditions, 4647 events. 2645/4647 cut-off events. For 1020439/1020439 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32151 event pairs, 471 based on Foata normal form. 1/4640 useless extension candidates. Maximal degree in co-relation 39182. Up to 3892 conditions per place. [2024-06-14 11:43:04,595 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 508 selfloop transitions, 60 changer transitions 0/577 dead transitions. [2024-06-14 11:43:04,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 577 transitions, 9108 flow [2024-06-14 11:43:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:43:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:43:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 11:43:04,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-14 11:43:04,596 INFO L175 Difference]: Start difference. First operand has 468 places, 537 transitions, 7045 flow. Second operand 10 states and 246 transitions. [2024-06-14 11:43:04,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 577 transitions, 9108 flow [2024-06-14 11:43:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 577 transitions, 9035 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:43:12,083 INFO L231 Difference]: Finished difference. Result has 471 places, 549 transitions, 7351 flow [2024-06-14 11:43:12,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7351, PETRI_PLACES=471, PETRI_TRANSITIONS=549} [2024-06-14 11:43:12,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-14 11:43:12,084 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 549 transitions, 7351 flow [2024-06-14 11:43:12,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:12,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:12,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:12,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 11:43:12,085 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:12,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:12,085 INFO L85 PathProgramCache]: Analyzing trace with hash 75876630, now seen corresponding path program 14 times [2024-06-14 11:43:12,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:12,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687481220] [2024-06-14 11:43:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:12,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:12,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:12,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687481220] [2024-06-14 11:43:12,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687481220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:12,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:12,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428408715] [2024-06-14 11:43:12,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:12,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:12,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:12,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:12,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 549 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:12,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:12,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:12,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:13,477 INFO L124 PetriNetUnfolderBase]: 2642/4643 cut-off events. [2024-06-14 11:43:13,477 INFO L125 PetriNetUnfolderBase]: For 1021914/1021914 co-relation queries the response was YES. [2024-06-14 11:43:13,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39394 conditions, 4643 events. 2642/4643 cut-off events. For 1021914/1021914 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32102 event pairs, 471 based on Foata normal form. 1/4636 useless extension candidates. Maximal degree in co-relation 39189. Up to 3889 conditions per place. [2024-06-14 11:43:13,553 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 503 selfloop transitions, 59 changer transitions 0/571 dead transitions. [2024-06-14 11:43:13,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 571 transitions, 8837 flow [2024-06-14 11:43:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:43:13,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-14 11:43:13,555 INFO L175 Difference]: Start difference. First operand has 471 places, 549 transitions, 7351 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:43:13,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 571 transitions, 8837 flow [2024-06-14 11:43:20,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 571 transitions, 8657 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 11:43:20,559 INFO L231 Difference]: Finished difference. Result has 476 places, 549 transitions, 7295 flow [2024-06-14 11:43:20,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7295, PETRI_PLACES=476, PETRI_TRANSITIONS=549} [2024-06-14 11:43:20,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 431 predicate places. [2024-06-14 11:43:20,560 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 549 transitions, 7295 flow [2024-06-14 11:43:20,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:20,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:20,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 11:43:20,561 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:20,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 722067884, now seen corresponding path program 15 times [2024-06-14 11:43:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140666418] [2024-06-14 11:43:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:20,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140666418] [2024-06-14 11:43:20,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140666418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:20,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:20,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:20,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069138249] [2024-06-14 11:43:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:20,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:20,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:20,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 549 transitions, 7295 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:20,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:20,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:20,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:22,272 INFO L124 PetriNetUnfolderBase]: 2639/4639 cut-off events. [2024-06-14 11:43:22,272 INFO L125 PetriNetUnfolderBase]: For 1021658/1021658 co-relation queries the response was YES. [2024-06-14 11:43:22,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39323 conditions, 4639 events. 2639/4639 cut-off events. For 1021658/1021658 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32083 event pairs, 471 based on Foata normal form. 1/4632 useless extension candidates. Maximal degree in co-relation 39116. Up to 3895 conditions per place. [2024-06-14 11:43:22,346 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 512 selfloop transitions, 52 changer transitions 0/573 dead transitions. [2024-06-14 11:43:22,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 573 transitions, 8483 flow [2024-06-14 11:43:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:43:22,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-14 11:43:22,348 INFO L175 Difference]: Start difference. First operand has 476 places, 549 transitions, 7295 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:43:22,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 573 transitions, 8483 flow [2024-06-14 11:43:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 573 transitions, 8339 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:43:28,195 INFO L231 Difference]: Finished difference. Result has 477 places, 549 transitions, 7261 flow [2024-06-14 11:43:28,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7261, PETRI_PLACES=477, PETRI_TRANSITIONS=549} [2024-06-14 11:43:28,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 432 predicate places. [2024-06-14 11:43:28,196 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 549 transitions, 7261 flow [2024-06-14 11:43:28,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:28,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:28,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:28,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 11:43:28,197 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:28,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash 722245514, now seen corresponding path program 16 times [2024-06-14 11:43:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:28,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949801514] [2024-06-14 11:43:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949801514] [2024-06-14 11:43:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949801514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:28,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:28,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:28,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416646189] [2024-06-14 11:43:28,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:28,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:28,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 549 transitions, 7261 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:28,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:28,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:28,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:29,494 INFO L124 PetriNetUnfolderBase]: 2652/4658 cut-off events. [2024-06-14 11:43:29,494 INFO L125 PetriNetUnfolderBase]: For 1047257/1047257 co-relation queries the response was YES. [2024-06-14 11:43:29,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39739 conditions, 4658 events. 2652/4658 cut-off events. For 1047257/1047257 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 32201 event pairs, 477 based on Foata normal form. 1/4648 useless extension candidates. Maximal degree in co-relation 39531. Up to 3707 conditions per place. [2024-06-14 11:43:29,576 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 190 changer transitions 0/579 dead transitions. [2024-06-14 11:43:29,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 579 transitions, 9549 flow [2024-06-14 11:43:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:43:29,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 11:43:29,578 INFO L175 Difference]: Start difference. First operand has 477 places, 549 transitions, 7261 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:43:29,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 579 transitions, 9549 flow [2024-06-14 11:43:35,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 579 transitions, 9431 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:43:35,714 INFO L231 Difference]: Finished difference. Result has 478 places, 555 transitions, 7683 flow [2024-06-14 11:43:35,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7143, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7683, PETRI_PLACES=478, PETRI_TRANSITIONS=555} [2024-06-14 11:43:35,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 433 predicate places. [2024-06-14 11:43:35,715 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 555 transitions, 7683 flow [2024-06-14 11:43:35,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:35,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:35,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 11:43:35,715 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:35,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1173835894, now seen corresponding path program 17 times [2024-06-14 11:43:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:35,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714622323] [2024-06-14 11:43:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:35,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714622323] [2024-06-14 11:43:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714622323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:35,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:35,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577869988] [2024-06-14 11:43:35,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:35,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 555 transitions, 7683 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:35,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:35,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:36,993 INFO L124 PetriNetUnfolderBase]: 2665/4680 cut-off events. [2024-06-14 11:43:36,994 INFO L125 PetriNetUnfolderBase]: For 1074476/1074476 co-relation queries the response was YES. [2024-06-14 11:43:37,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40486 conditions, 4680 events. 2665/4680 cut-off events. For 1074476/1074476 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32429 event pairs, 477 based on Foata normal form. 1/4670 useless extension candidates. Maximal degree in co-relation 40277. Up to 3722 conditions per place. [2024-06-14 11:43:37,239 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 188 changer transitions 0/583 dead transitions. [2024-06-14 11:43:37,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 583 transitions, 10305 flow [2024-06-14 11:43:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:43:37,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:43:37,240 INFO L175 Difference]: Start difference. First operand has 478 places, 555 transitions, 7683 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:43:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 583 transitions, 10305 flow [2024-06-14 11:43:43,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 583 transitions, 9707 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-14 11:43:43,377 INFO L231 Difference]: Finished difference. Result has 481 places, 561 transitions, 7633 flow [2024-06-14 11:43:43,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7633, PETRI_PLACES=481, PETRI_TRANSITIONS=561} [2024-06-14 11:43:43,378 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 436 predicate places. [2024-06-14 11:43:43,378 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 561 transitions, 7633 flow [2024-06-14 11:43:43,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:43,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:43,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:43,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 11:43:43,379 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:43,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1174073044, now seen corresponding path program 18 times [2024-06-14 11:43:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:43,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918169514] [2024-06-14 11:43:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:43,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918169514] [2024-06-14 11:43:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918169514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565695648] [2024-06-14 11:43:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:43,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:43,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 561 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:43,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:43,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:43,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:44,677 INFO L124 PetriNetUnfolderBase]: 2662/4676 cut-off events. [2024-06-14 11:43:44,677 INFO L125 PetriNetUnfolderBase]: For 1072230/1072230 co-relation queries the response was YES. [2024-06-14 11:43:44,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40143 conditions, 4676 events. 2662/4676 cut-off events. For 1072230/1072230 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 32350 event pairs, 477 based on Foata normal form. 1/4666 useless extension candidates. Maximal degree in co-relation 39933. Up to 3719 conditions per place. [2024-06-14 11:43:44,748 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 385 selfloop transitions, 189 changer transitions 0/583 dead transitions. [2024-06-14 11:43:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 583 transitions, 10097 flow [2024-06-14 11:43:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:43:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:43:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:43:44,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:43:44,750 INFO L175 Difference]: Start difference. First operand has 481 places, 561 transitions, 7633 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:43:44,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 583 transitions, 10097 flow [2024-06-14 11:43:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 583 transitions, 9633 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 11:43:50,420 INFO L231 Difference]: Finished difference. Result has 485 places, 561 transitions, 7553 flow [2024-06-14 11:43:50,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7553, PETRI_PLACES=485, PETRI_TRANSITIONS=561} [2024-06-14 11:43:50,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 440 predicate places. [2024-06-14 11:43:50,420 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 561 transitions, 7553 flow [2024-06-14 11:43:50,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:50,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:50,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 11:43:50,421 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:50,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 800750972, now seen corresponding path program 19 times [2024-06-14 11:43:50,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:50,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783583277] [2024-06-14 11:43:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783583277] [2024-06-14 11:43:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783583277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:50,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:50,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:50,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347617865] [2024-06-14 11:43:50,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:50,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:50,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:50,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:50,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:50,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:50,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 561 transitions, 7553 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:50,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:51,776 INFO L124 PetriNetUnfolderBase]: 2667/4688 cut-off events. [2024-06-14 11:43:51,776 INFO L125 PetriNetUnfolderBase]: For 1082452/1082452 co-relation queries the response was YES. [2024-06-14 11:43:51,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39957 conditions, 4688 events. 2667/4688 cut-off events. For 1082452/1082452 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32510 event pairs, 471 based on Foata normal form. 1/4681 useless extension candidates. Maximal degree in co-relation 39746. Up to 3890 conditions per place. [2024-06-14 11:43:51,854 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 489 selfloop transitions, 94 changer transitions 0/592 dead transitions. [2024-06-14 11:43:51,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 592 transitions, 9165 flow [2024-06-14 11:43:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:43:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:43:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 11:43:51,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 11:43:51,855 INFO L175 Difference]: Start difference. First operand has 485 places, 561 transitions, 7553 flow. Second operand 11 states and 264 transitions. [2024-06-14 11:43:51,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 592 transitions, 9165 flow [2024-06-14 11:43:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 592 transitions, 8763 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:43:57,397 INFO L231 Difference]: Finished difference. Result has 491 places, 564 transitions, 7419 flow [2024-06-14 11:43:57,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7419, PETRI_PLACES=491, PETRI_TRANSITIONS=564} [2024-06-14 11:43:57,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-14 11:43:57,398 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 564 transitions, 7419 flow [2024-06-14 11:43:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:57,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:43:57,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:43:57,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 11:43:57,398 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:43:57,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:43:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 232655916, now seen corresponding path program 20 times [2024-06-14 11:43:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:43:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765738695] [2024-06-14 11:43:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:43:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:43:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:43:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:43:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:43:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765738695] [2024-06-14 11:43:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765738695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:43:57,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:43:57,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:43:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88364862] [2024-06-14 11:43:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:43:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:43:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:43:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:43:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:43:57,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:43:57,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 564 transitions, 7419 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:43:57,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:43:57,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:43:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:43:58,707 INFO L124 PetriNetUnfolderBase]: 2664/4684 cut-off events. [2024-06-14 11:43:58,708 INFO L125 PetriNetUnfolderBase]: For 1081745/1081745 co-relation queries the response was YES. [2024-06-14 11:43:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39668 conditions, 4684 events. 2664/4684 cut-off events. For 1081745/1081745 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32465 event pairs, 471 based on Foata normal form. 1/4677 useless extension candidates. Maximal degree in co-relation 39455. Up to 3887 conditions per place. [2024-06-14 11:43:58,971 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 487 selfloop transitions, 92 changer transitions 0/588 dead transitions. [2024-06-14 11:43:58,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 588 transitions, 8955 flow [2024-06-14 11:43:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:43:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:43:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 11:43:58,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-14 11:43:58,972 INFO L175 Difference]: Start difference. First operand has 491 places, 564 transitions, 7419 flow. Second operand 10 states and 244 transitions. [2024-06-14 11:43:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 588 transitions, 8955 flow [2024-06-14 11:44:05,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 588 transitions, 8653 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-14 11:44:05,451 INFO L231 Difference]: Finished difference. Result has 491 places, 564 transitions, 7307 flow [2024-06-14 11:44:05,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7307, PETRI_PLACES=491, PETRI_TRANSITIONS=564} [2024-06-14 11:44:05,452 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 446 predicate places. [2024-06-14 11:44:05,452 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 564 transitions, 7307 flow [2024-06-14 11:44:05,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:05,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:05,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:05,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 11:44:05,452 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:05,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:05,453 INFO L85 PathProgramCache]: Analyzing trace with hash -343797900, now seen corresponding path program 21 times [2024-06-14 11:44:05,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:05,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592695342] [2024-06-14 11:44:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:05,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592695342] [2024-06-14 11:44:05,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592695342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:05,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:05,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181979503] [2024-06-14 11:44:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:05,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:05,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:05,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 564 transitions, 7307 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:05,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:05,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:05,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:06,810 INFO L124 PetriNetUnfolderBase]: 2661/4680 cut-off events. [2024-06-14 11:44:06,811 INFO L125 PetriNetUnfolderBase]: For 1081371/1081371 co-relation queries the response was YES. [2024-06-14 11:44:06,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39332 conditions, 4680 events. 2661/4680 cut-off events. For 1081371/1081371 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32456 event pairs, 471 based on Foata normal form. 1/4673 useless extension candidates. Maximal degree in co-relation 39119. Up to 3884 conditions per place. [2024-06-14 11:44:06,887 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 482 selfloop transitions, 91 changer transitions 0/582 dead transitions. [2024-06-14 11:44:06,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 582 transitions, 8497 flow [2024-06-14 11:44:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:44:06,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:44:06,889 INFO L175 Difference]: Start difference. First operand has 491 places, 564 transitions, 7307 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:44:06,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 582 transitions, 8497 flow [2024-06-14 11:44:12,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 582 transitions, 8247 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 11:44:12,841 INFO L231 Difference]: Finished difference. Result has 490 places, 564 transitions, 7245 flow [2024-06-14 11:44:12,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7245, PETRI_PLACES=490, PETRI_TRANSITIONS=564} [2024-06-14 11:44:12,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-14 11:44:12,841 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 564 transitions, 7245 flow [2024-06-14 11:44:12,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:12,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:12,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:12,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 11:44:12,842 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:12,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -605883242, now seen corresponding path program 22 times [2024-06-14 11:44:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416841030] [2024-06-14 11:44:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:12,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:12,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416841030] [2024-06-14 11:44:12,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416841030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:12,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687786317] [2024-06-14 11:44:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:12,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:12,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:12,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 564 transitions, 7245 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:12,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:12,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:12,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:14,078 INFO L124 PetriNetUnfolderBase]: 2682/4712 cut-off events. [2024-06-14 11:44:14,079 INFO L125 PetriNetUnfolderBase]: For 1121182/1121182 co-relation queries the response was YES. [2024-06-14 11:44:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39946 conditions, 4712 events. 2682/4712 cut-off events. For 1121182/1121182 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32704 event pairs, 477 based on Foata normal form. 1/4702 useless extension candidates. Maximal degree in co-relation 39732. Up to 3743 conditions per place. [2024-06-14 11:44:14,164 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 378 selfloop transitions, 204 changer transitions 0/591 dead transitions. [2024-06-14 11:44:14,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 591 transitions, 9603 flow [2024-06-14 11:44:14,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:44:14,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-14 11:44:14,166 INFO L175 Difference]: Start difference. First operand has 490 places, 564 transitions, 7245 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:44:14,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 591 transitions, 9603 flow [2024-06-14 11:44:20,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 591 transitions, 9411 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:44:20,861 INFO L231 Difference]: Finished difference. Result has 490 places, 573 transitions, 7647 flow [2024-06-14 11:44:20,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7647, PETRI_PLACES=490, PETRI_TRANSITIONS=573} [2024-06-14 11:44:20,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-14 11:44:20,862 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 573 transitions, 7647 flow [2024-06-14 11:44:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:20,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:20,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:20,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 11:44:20,862 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:20,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -606062732, now seen corresponding path program 23 times [2024-06-14 11:44:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872093277] [2024-06-14 11:44:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:20,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:20,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872093277] [2024-06-14 11:44:20,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872093277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:20,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:20,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:20,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329742308] [2024-06-14 11:44:20,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:20,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:20,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:21,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:21,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 573 transitions, 7647 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:21,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:21,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:21,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:22,415 INFO L124 PetriNetUnfolderBase]: 2679/4708 cut-off events. [2024-06-14 11:44:22,415 INFO L125 PetriNetUnfolderBase]: For 1122122/1122122 co-relation queries the response was YES. [2024-06-14 11:44:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40055 conditions, 4708 events. 2679/4708 cut-off events. For 1122122/1122122 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32676 event pairs, 477 based on Foata normal form. 1/4698 useless extension candidates. Maximal degree in co-relation 39840. Up to 3740 conditions per place. [2024-06-14 11:44:22,492 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 375 selfloop transitions, 206 changer transitions 0/590 dead transitions. [2024-06-14 11:44:22,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 590 transitions, 9501 flow [2024-06-14 11:44:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:44:22,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:44:22,493 INFO L175 Difference]: Start difference. First operand has 490 places, 573 transitions, 7647 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:44:22,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 590 transitions, 9501 flow [2024-06-14 11:44:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 590 transitions, 9120 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 11:44:28,332 INFO L231 Difference]: Finished difference. Result has 495 places, 573 transitions, 7684 flow [2024-06-14 11:44:28,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7684, PETRI_PLACES=495, PETRI_TRANSITIONS=573} [2024-06-14 11:44:28,340 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 450 predicate places. [2024-06-14 11:44:28,340 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 573 transitions, 7684 flow [2024-06-14 11:44:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:28,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:28,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:28,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 11:44:28,341 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:28,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash -952715404, now seen corresponding path program 24 times [2024-06-14 11:44:28,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:28,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33782721] [2024-06-14 11:44:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33782721] [2024-06-14 11:44:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33782721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:28,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:28,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:28,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987607146] [2024-06-14 11:44:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:28,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 573 transitions, 7684 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:29,967 INFO L124 PetriNetUnfolderBase]: 2676/4704 cut-off events. [2024-06-14 11:44:29,967 INFO L125 PetriNetUnfolderBase]: For 1122773/1122773 co-relation queries the response was YES. [2024-06-14 11:44:30,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39889 conditions, 4704 events. 2676/4704 cut-off events. For 1122773/1122773 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 32641 event pairs, 477 based on Foata normal form. 1/4694 useless extension candidates. Maximal degree in co-relation 39673. Up to 3737 conditions per place. [2024-06-14 11:44:30,042 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 210 changer transitions 0/589 dead transitions. [2024-06-14 11:44:30,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 589 transitions, 9210 flow [2024-06-14 11:44:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:44:30,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:44:30,043 INFO L175 Difference]: Start difference. First operand has 495 places, 573 transitions, 7684 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:44:30,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 589 transitions, 9210 flow [2024-06-14 11:44:37,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 589 transitions, 8784 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:44:37,206 INFO L231 Difference]: Finished difference. Result has 497 places, 573 transitions, 7684 flow [2024-06-14 11:44:37,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7258, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7684, PETRI_PLACES=497, PETRI_TRANSITIONS=573} [2024-06-14 11:44:37,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-14 11:44:37,206 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 573 transitions, 7684 flow [2024-06-14 11:44:37,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:37,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:37,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 11:44:37,207 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:37,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 722252458, now seen corresponding path program 13 times [2024-06-14 11:44:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:37,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506210399] [2024-06-14 11:44:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:37,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:37,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506210399] [2024-06-14 11:44:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506210399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:37,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:37,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930944684] [2024-06-14 11:44:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:37,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:37,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:37,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:37,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 573 transitions, 7684 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:37,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:38,565 INFO L124 PetriNetUnfolderBase]: 2681/4710 cut-off events. [2024-06-14 11:44:38,565 INFO L125 PetriNetUnfolderBase]: For 1135977/1135977 co-relation queries the response was YES. [2024-06-14 11:44:38,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40016 conditions, 4710 events. 2681/4710 cut-off events. For 1135977/1135977 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 32689 event pairs, 486 based on Foata normal form. 1/4697 useless extension candidates. Maximal degree in co-relation 39799. Up to 3816 conditions per place. [2024-06-14 11:44:38,641 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 177 changer transitions 0/599 dead transitions. [2024-06-14 11:44:38,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 599 transitions, 9632 flow [2024-06-14 11:44:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:44:38,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:44:38,642 INFO L175 Difference]: Start difference. First operand has 497 places, 573 transitions, 7684 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:44:38,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 599 transitions, 9632 flow [2024-06-14 11:44:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 599 transitions, 9162 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 11:44:45,174 INFO L231 Difference]: Finished difference. Result has 496 places, 576 transitions, 7626 flow [2024-06-14 11:44:45,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7214, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7626, PETRI_PLACES=496, PETRI_TRANSITIONS=576} [2024-06-14 11:44:45,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-14 11:44:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 576 transitions, 7626 flow [2024-06-14 11:44:45,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 11:44:45,175 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1180495190, now seen corresponding path program 14 times [2024-06-14 11:44:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102778051] [2024-06-14 11:44:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102778051] [2024-06-14 11:44:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102778051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:45,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:45,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:45,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816466096] [2024-06-14 11:44:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:45,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:45,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:45,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:45,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 576 transitions, 7626 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:45,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:45,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:46,602 INFO L124 PetriNetUnfolderBase]: 2686/4719 cut-off events. [2024-06-14 11:44:46,603 INFO L125 PetriNetUnfolderBase]: For 1148798/1148798 co-relation queries the response was YES. [2024-06-14 11:44:46,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40040 conditions, 4719 events. 2686/4719 cut-off events. For 1148798/1148798 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 32735 event pairs, 486 based on Foata normal form. 1/4706 useless extension candidates. Maximal degree in co-relation 39823. Up to 3822 conditions per place. [2024-06-14 11:44:46,684 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 418 selfloop transitions, 173 changer transitions 0/600 dead transitions. [2024-06-14 11:44:46,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 600 transitions, 9912 flow [2024-06-14 11:44:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:44:46,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:44:46,686 INFO L175 Difference]: Start difference. First operand has 496 places, 576 transitions, 7626 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:44:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 600 transitions, 9912 flow [2024-06-14 11:44:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 600 transitions, 9362 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 11:44:53,748 INFO L231 Difference]: Finished difference. Result has 497 places, 579 transitions, 7486 flow [2024-06-14 11:44:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7486, PETRI_PLACES=497, PETRI_TRANSITIONS=579} [2024-06-14 11:44:53,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-14 11:44:53,749 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 579 transitions, 7486 flow [2024-06-14 11:44:53,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:53,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:44:53,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:44:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 11:44:53,749 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:44:53,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:44:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 253252244, now seen corresponding path program 15 times [2024-06-14 11:44:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:44:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626301582] [2024-06-14 11:44:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:44:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:44:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:44:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:44:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:44:53,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626301582] [2024-06-14 11:44:53,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626301582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:44:53,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:44:53,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:44:53,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382422552] [2024-06-14 11:44:53,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:44:53,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:44:53,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:44:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:44:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:44:53,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:44:53,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 579 transitions, 7486 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:44:53,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:44:53,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:44:53,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:44:55,063 INFO L124 PetriNetUnfolderBase]: 2683/4715 cut-off events. [2024-06-14 11:44:55,063 INFO L125 PetriNetUnfolderBase]: For 1146622/1146622 co-relation queries the response was YES. [2024-06-14 11:44:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39676 conditions, 4715 events. 2683/4715 cut-off events. For 1146622/1146622 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 32720 event pairs, 486 based on Foata normal form. 1/4702 useless extension candidates. Maximal degree in co-relation 39459. Up to 3819 conditions per place. [2024-06-14 11:44:55,142 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 416 selfloop transitions, 174 changer transitions 0/599 dead transitions. [2024-06-14 11:44:55,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 599 transitions, 9382 flow [2024-06-14 11:44:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:44:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:44:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:44:55,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:44:55,144 INFO L175 Difference]: Start difference. First operand has 497 places, 579 transitions, 7486 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:44:55,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 599 transitions, 9382 flow [2024-06-14 11:45:02,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 599 transitions, 8978 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:45:02,208 INFO L231 Difference]: Finished difference. Result has 500 places, 579 transitions, 7436 flow [2024-06-14 11:45:02,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7436, PETRI_PLACES=500, PETRI_TRANSITIONS=579} [2024-06-14 11:45:02,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-14 11:45:02,209 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 579 transitions, 7436 flow [2024-06-14 11:45:02,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:02,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:02,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 11:45:02,210 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:02,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash -592723308, now seen corresponding path program 16 times [2024-06-14 11:45:02,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:02,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494789894] [2024-06-14 11:45:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:02,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:02,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:02,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494789894] [2024-06-14 11:45:02,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494789894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:02,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:02,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305975539] [2024-06-14 11:45:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:02,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 579 transitions, 7436 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:03,464 INFO L124 PetriNetUnfolderBase]: 2704/4750 cut-off events. [2024-06-14 11:45:03,465 INFO L125 PetriNetUnfolderBase]: For 1188431/1188431 co-relation queries the response was YES. [2024-06-14 11:45:03,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40306 conditions, 4750 events. 2704/4750 cut-off events. For 1188431/1188431 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33067 event pairs, 486 based on Foata normal form. 1/4737 useless extension candidates. Maximal degree in co-relation 40088. Up to 3843 conditions per place. [2024-06-14 11:45:03,703 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 415 selfloop transitions, 182 changer transitions 0/606 dead transitions. [2024-06-14 11:45:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 606 transitions, 9848 flow [2024-06-14 11:45:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:45:03,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-14 11:45:03,711 INFO L175 Difference]: Start difference. First operand has 500 places, 579 transitions, 7436 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:45:03,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 606 transitions, 9848 flow [2024-06-14 11:45:10,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 606 transitions, 9414 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:45:10,759 INFO L231 Difference]: Finished difference. Result has 500 places, 588 transitions, 7540 flow [2024-06-14 11:45:10,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7020, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7540, PETRI_PLACES=500, PETRI_TRANSITIONS=588} [2024-06-14 11:45:10,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-14 11:45:10,760 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 588 transitions, 7540 flow [2024-06-14 11:45:10,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:10,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:10,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:10,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 11:45:10,761 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:10,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1525724946, now seen corresponding path program 17 times [2024-06-14 11:45:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:10,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972222072] [2024-06-14 11:45:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:10,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:10,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972222072] [2024-06-14 11:45:10,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972222072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:10,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:10,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:10,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648170854] [2024-06-14 11:45:10,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:10,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:10,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:10,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:10,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:10,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:10,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 588 transitions, 7540 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:10,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:10,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:10,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:12,141 INFO L124 PetriNetUnfolderBase]: 2701/4746 cut-off events. [2024-06-14 11:45:12,141 INFO L125 PetriNetUnfolderBase]: For 1187365/1187365 co-relation queries the response was YES. [2024-06-14 11:45:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40159 conditions, 4746 events. 2701/4746 cut-off events. For 1187365/1187365 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33006 event pairs, 486 based on Foata normal form. 1/4733 useless extension candidates. Maximal degree in co-relation 39940. Up to 3840 conditions per place. [2024-06-14 11:45:12,219 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 413 selfloop transitions, 183 changer transitions 0/605 dead transitions. [2024-06-14 11:45:12,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 605 transitions, 9448 flow [2024-06-14 11:45:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:45:12,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 11:45:12,220 INFO L175 Difference]: Start difference. First operand has 500 places, 588 transitions, 7540 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:45:12,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 605 transitions, 9448 flow [2024-06-14 11:45:19,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 605 transitions, 9142 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 11:45:19,898 INFO L231 Difference]: Finished difference. Result has 505 places, 588 transitions, 7606 flow [2024-06-14 11:45:19,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7606, PETRI_PLACES=505, PETRI_TRANSITIONS=588} [2024-06-14 11:45:19,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-14 11:45:19,899 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 588 transitions, 7606 flow [2024-06-14 11:45:19,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:19,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:19,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:19,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 11:45:19,900 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:19,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1165247124, now seen corresponding path program 18 times [2024-06-14 11:45:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:19,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130216280] [2024-06-14 11:45:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:20,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130216280] [2024-06-14 11:45:20,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130216280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:20,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:20,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:20,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149166963] [2024-06-14 11:45:20,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:20,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:20,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 588 transitions, 7606 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:20,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:20,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:21,337 INFO L124 PetriNetUnfolderBase]: 2698/4756 cut-off events. [2024-06-14 11:45:21,337 INFO L125 PetriNetUnfolderBase]: For 1186817/1186817 co-relation queries the response was YES. [2024-06-14 11:45:21,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40048 conditions, 4756 events. 2698/4756 cut-off events. For 1186817/1186817 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 33068 event pairs, 459 based on Foata normal form. 1/4753 useless extension candidates. Maximal degree in co-relation 39828. Up to 4119 conditions per place. [2024-06-14 11:45:21,414 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 563 selfloop transitions, 31 changer transitions 0/603 dead transitions. [2024-06-14 11:45:21,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 603 transitions, 8830 flow [2024-06-14 11:45:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:45:21,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-14 11:45:21,415 INFO L175 Difference]: Start difference. First operand has 505 places, 588 transitions, 7606 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:45:21,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 603 transitions, 8830 flow [2024-06-14 11:45:28,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 603 transitions, 8452 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:45:28,210 INFO L231 Difference]: Finished difference. Result has 507 places, 588 transitions, 7296 flow [2024-06-14 11:45:28,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7296, PETRI_PLACES=507, PETRI_TRANSITIONS=588} [2024-06-14 11:45:28,211 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-14 11:45:28,211 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 588 transitions, 7296 flow [2024-06-14 11:45:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:28,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:28,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 11:45:28,212 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:28,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1416310250, now seen corresponding path program 25 times [2024-06-14 11:45:28,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:28,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950848844] [2024-06-14 11:45:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950848844] [2024-06-14 11:45:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950848844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:28,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:28,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:28,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126834000] [2024-06-14 11:45:28,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:28,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:28,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 588 transitions, 7296 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:28,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:28,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:28,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:29,492 INFO L124 PetriNetUnfolderBase]: 2703/4737 cut-off events. [2024-06-14 11:45:29,492 INFO L125 PetriNetUnfolderBase]: For 1200025/1200025 co-relation queries the response was YES. [2024-06-14 11:45:29,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39807 conditions, 4737 events. 2703/4737 cut-off events. For 1200025/1200025 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32999 event pairs, 535 based on Foata normal form. 1/4718 useless extension candidates. Maximal degree in co-relation 39586. Up to 3774 conditions per place. [2024-06-14 11:45:29,575 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 206 changer transitions 0/606 dead transitions. [2024-06-14 11:45:29,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 606 transitions, 9607 flow [2024-06-14 11:45:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:45:29,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:45:29,576 INFO L175 Difference]: Start difference. First operand has 507 places, 588 transitions, 7296 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:45:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 606 transitions, 9607 flow [2024-06-14 11:45:39,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 606 transitions, 9517 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:45:39,025 INFO L231 Difference]: Finished difference. Result has 507 places, 591 transitions, 7681 flow [2024-06-14 11:45:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7681, PETRI_PLACES=507, PETRI_TRANSITIONS=591} [2024-06-14 11:45:39,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-14 11:45:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 591 transitions, 7681 flow [2024-06-14 11:45:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 11:45:39,026 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:39,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1354231668, now seen corresponding path program 26 times [2024-06-14 11:45:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649053657] [2024-06-14 11:45:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:39,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:39,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649053657] [2024-06-14 11:45:39,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649053657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:39,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:39,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:39,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006098811] [2024-06-14 11:45:39,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:39,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:39,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:39,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:39,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 591 transitions, 7681 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:39,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:39,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:39,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:40,371 INFO L124 PetriNetUnfolderBase]: 2700/4733 cut-off events. [2024-06-14 11:45:40,372 INFO L125 PetriNetUnfolderBase]: For 1200660/1200660 co-relation queries the response was YES. [2024-06-14 11:45:40,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40079 conditions, 4733 events. 2700/4733 cut-off events. For 1200660/1200660 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 32975 event pairs, 535 based on Foata normal form. 1/4714 useless extension candidates. Maximal degree in co-relation 39857. Up to 3771 conditions per place. [2024-06-14 11:45:40,454 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 207 changer transitions 0/605 dead transitions. [2024-06-14 11:45:40,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 605 transitions, 9593 flow [2024-06-14 11:45:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:45:40,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:45:40,455 INFO L175 Difference]: Start difference. First operand has 507 places, 591 transitions, 7681 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:45:40,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 605 transitions, 9593 flow [2024-06-14 11:45:48,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 605 transitions, 8975 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:45:48,365 INFO L231 Difference]: Finished difference. Result has 509 places, 591 transitions, 7483 flow [2024-06-14 11:45:48,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7063, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7483, PETRI_PLACES=509, PETRI_TRANSITIONS=591} [2024-06-14 11:45:48,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 464 predicate places. [2024-06-14 11:45:48,366 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 591 transitions, 7483 flow [2024-06-14 11:45:48,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:48,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:48,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 11:45:48,367 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:48,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1216239756, now seen corresponding path program 27 times [2024-06-14 11:45:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:48,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204469746] [2024-06-14 11:45:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204469746] [2024-06-14 11:45:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204469746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:48,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:48,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:48,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594449941] [2024-06-14 11:45:48,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 591 transitions, 7483 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:45:49,736 INFO L124 PetriNetUnfolderBase]: 2713/4755 cut-off events. [2024-06-14 11:45:49,737 INFO L125 PetriNetUnfolderBase]: For 1226740/1226740 co-relation queries the response was YES. [2024-06-14 11:45:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40358 conditions, 4755 events. 2713/4755 cut-off events. For 1226740/1226740 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33115 event pairs, 535 based on Foata normal form. 1/4736 useless extension candidates. Maximal degree in co-relation 40135. Up to 3786 conditions per place. [2024-06-14 11:45:49,819 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 212 changer transitions 0/612 dead transitions. [2024-06-14 11:45:49,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 612 transitions, 9879 flow [2024-06-14 11:45:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:45:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:45:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 11:45:49,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 11:45:49,821 INFO L175 Difference]: Start difference. First operand has 509 places, 591 transitions, 7483 flow. Second operand 8 states and 200 transitions. [2024-06-14 11:45:49,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 612 transitions, 9879 flow [2024-06-14 11:45:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 612 transitions, 9449 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:45:58,837 INFO L231 Difference]: Finished difference. Result has 511 places, 597 transitions, 7601 flow [2024-06-14 11:45:58,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7065, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7601, PETRI_PLACES=511, PETRI_TRANSITIONS=597} [2024-06-14 11:45:58,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 466 predicate places. [2024-06-14 11:45:58,837 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 597 transitions, 7601 flow [2024-06-14 11:45:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:58,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:45:58,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:45:58,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 11:45:58,838 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:45:58,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:45:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1222905996, now seen corresponding path program 28 times [2024-06-14 11:45:58,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:45:58,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160731267] [2024-06-14 11:45:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:45:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:45:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:45:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:45:58,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:45:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160731267] [2024-06-14 11:45:58,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160731267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:45:58,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:45:58,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:45:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119717641] [2024-06-14 11:45:58,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:45:58,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:45:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:45:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:45:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:45:59,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:45:59,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 597 transitions, 7601 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:45:59,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:45:59,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:45:59,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:00,094 INFO L124 PetriNetUnfolderBase]: 2710/4751 cut-off events. [2024-06-14 11:46:00,094 INFO L125 PetriNetUnfolderBase]: For 1225148/1225148 co-relation queries the response was YES. [2024-06-14 11:46:00,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40226 conditions, 4751 events. 2710/4751 cut-off events. For 1225148/1225148 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33112 event pairs, 535 based on Foata normal form. 1/4732 useless extension candidates. Maximal degree in co-relation 40002. Up to 3783 conditions per place. [2024-06-14 11:46:00,178 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 213 changer transitions 0/611 dead transitions. [2024-06-14 11:46:00,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 611 transitions, 9533 flow [2024-06-14 11:46:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:46:00,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 11:46:00,181 INFO L175 Difference]: Start difference. First operand has 511 places, 597 transitions, 7601 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:46:00,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 611 transitions, 9533 flow [2024-06-14 11:46:07,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 611 transitions, 8861 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 11:46:07,595 INFO L231 Difference]: Finished difference. Result has 512 places, 597 transitions, 7361 flow [2024-06-14 11:46:07,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7361, PETRI_PLACES=512, PETRI_TRANSITIONS=597} [2024-06-14 11:46:07,607 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-14 11:46:07,607 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 597 transitions, 7361 flow [2024-06-14 11:46:07,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:07,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:07,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:07,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 11:46:07,608 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:07,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1569558668, now seen corresponding path program 29 times [2024-06-14 11:46:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984694480] [2024-06-14 11:46:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:07,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984694480] [2024-06-14 11:46:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984694480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:07,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:07,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151600961] [2024-06-14 11:46:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:07,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:07,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 597 transitions, 7361 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:07,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:07,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:07,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:08,936 INFO L124 PetriNetUnfolderBase]: 2707/4747 cut-off events. [2024-06-14 11:46:08,937 INFO L125 PetriNetUnfolderBase]: For 1220790/1220790 co-relation queries the response was YES. [2024-06-14 11:46:08,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39994 conditions, 4747 events. 2707/4747 cut-off events. For 1220790/1220790 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33104 event pairs, 535 based on Foata normal form. 1/4728 useless extension candidates. Maximal degree in co-relation 39769. Up to 3780 conditions per place. [2024-06-14 11:46:09,016 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 382 selfloop transitions, 219 changer transitions 0/610 dead transitions. [2024-06-14 11:46:09,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 610 transitions, 8943 flow [2024-06-14 11:46:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:46:09,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 11:46:09,017 INFO L175 Difference]: Start difference. First operand has 512 places, 597 transitions, 7361 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:46:09,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 610 transitions, 8943 flow [2024-06-14 11:46:17,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 610 transitions, 8435 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:46:17,109 INFO L231 Difference]: Finished difference. Result has 513 places, 597 transitions, 7297 flow [2024-06-14 11:46:17,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6853, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7297, PETRI_PLACES=513, PETRI_TRANSITIONS=597} [2024-06-14 11:46:17,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 468 predicate places. [2024-06-14 11:46:17,110 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 597 transitions, 7297 flow [2024-06-14 11:46:17,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:17,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:17,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:17,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 11:46:17,111 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:17,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:17,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1066635124, now seen corresponding path program 30 times [2024-06-14 11:46:17,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171283880] [2024-06-14 11:46:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:17,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:17,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:17,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171283880] [2024-06-14 11:46:17,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171283880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:17,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:17,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974951568] [2024-06-14 11:46:17,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:17,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:17,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 597 transitions, 7297 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:17,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:17,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:17,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:18,455 INFO L124 PetriNetUnfolderBase]: 2704/4763 cut-off events. [2024-06-14 11:46:18,456 INFO L125 PetriNetUnfolderBase]: For 1217485/1217485 co-relation queries the response was YES. [2024-06-14 11:46:18,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39847 conditions, 4763 events. 2704/4763 cut-off events. For 1217485/1217485 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 33210 event pairs, 471 based on Foata normal form. 1/4756 useless extension candidates. Maximal degree in co-relation 39621. Up to 4110 conditions per place. [2024-06-14 11:46:18,539 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 569 selfloop transitions, 31 changer transitions 0/609 dead transitions. [2024-06-14 11:46:18,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 609 transitions, 8525 flow [2024-06-14 11:46:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:46:18,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 11:46:18,540 INFO L175 Difference]: Start difference. First operand has 513 places, 597 transitions, 7297 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:46:18,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 609 transitions, 8525 flow [2024-06-14 11:46:27,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 609 transitions, 8041 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 11:46:27,488 INFO L231 Difference]: Finished difference. Result has 513 places, 597 transitions, 6881 flow [2024-06-14 11:46:27,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6881, PETRI_PLACES=513, PETRI_TRANSITIONS=597} [2024-06-14 11:46:27,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 468 predicate places. [2024-06-14 11:46:27,489 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 597 transitions, 6881 flow [2024-06-14 11:46:27,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:27,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:27,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 11:46:27,489 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:27,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash -779682442, now seen corresponding path program 19 times [2024-06-14 11:46:27,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:27,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89295290] [2024-06-14 11:46:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:27,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89295290] [2024-06-14 11:46:27,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89295290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372651492] [2024-06-14 11:46:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:27,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:27,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:27,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 597 transitions, 6881 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:27,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:27,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:28,906 INFO L124 PetriNetUnfolderBase]: 2709/4779 cut-off events. [2024-06-14 11:46:28,907 INFO L125 PetriNetUnfolderBase]: For 1229540/1229540 co-relation queries the response was YES. [2024-06-14 11:46:28,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39532 conditions, 4779 events. 2709/4779 cut-off events. For 1229540/1229540 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 33334 event pairs, 461 based on Foata normal form. 1/4776 useless extension candidates. Maximal degree in co-relation 39305. Up to 4135 conditions per place. [2024-06-14 11:46:28,990 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 572 selfloop transitions, 31 changer transitions 0/612 dead transitions. [2024-06-14 11:46:28,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 612 transitions, 8168 flow [2024-06-14 11:46:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:46:28,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 11:46:28,992 INFO L175 Difference]: Start difference. First operand has 513 places, 597 transitions, 6881 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:46:28,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 612 transitions, 8168 flow [2024-06-14 11:46:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 612 transitions, 8068 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 11:46:36,864 INFO L231 Difference]: Finished difference. Result has 512 places, 600 transitions, 6908 flow [2024-06-14 11:46:36,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6908, PETRI_PLACES=512, PETRI_TRANSITIONS=600} [2024-06-14 11:46:36,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-14 11:46:36,865 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 600 transitions, 6908 flow [2024-06-14 11:46:36,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:36,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:36,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:36,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 11:46:36,865 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:36,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1007585940, now seen corresponding path program 20 times [2024-06-14 11:46:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:36,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26535905] [2024-06-14 11:46:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:36,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:36,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:36,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26535905] [2024-06-14 11:46:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26535905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:36,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:36,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970624835] [2024-06-14 11:46:36,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:36,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:37,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:37,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 600 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:37,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:37,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:37,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:38,204 INFO L124 PetriNetUnfolderBase]: 2746/4822 cut-off events. [2024-06-14 11:46:38,205 INFO L125 PetriNetUnfolderBase]: For 1308126/1308126 co-relation queries the response was YES. [2024-06-14 11:46:38,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40685 conditions, 4822 events. 2746/4822 cut-off events. For 1308126/1308126 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 33671 event pairs, 495 based on Foata normal form. 1/4809 useless extension candidates. Maximal degree in co-relation 40457. Up to 3894 conditions per place. [2024-06-14 11:46:38,289 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 422 selfloop transitions, 199 changer transitions 0/630 dead transitions. [2024-06-14 11:46:38,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 630 transitions, 9523 flow [2024-06-14 11:46:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:46:38,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:46:38,290 INFO L175 Difference]: Start difference. First operand has 512 places, 600 transitions, 6908 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:46:38,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 630 transitions, 9523 flow [2024-06-14 11:46:47,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 630 transitions, 9433 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:46:47,718 INFO L231 Difference]: Finished difference. Result has 514 places, 615 transitions, 7493 flow [2024-06-14 11:46:47,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6818, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7493, PETRI_PLACES=514, PETRI_TRANSITIONS=615} [2024-06-14 11:46:47,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 469 predicate places. [2024-06-14 11:46:47,719 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 615 transitions, 7493 flow [2024-06-14 11:46:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:47,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:47,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 11:46:47,719 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:47,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 240361010, now seen corresponding path program 21 times [2024-06-14 11:46:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178187963] [2024-06-14 11:46:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178187963] [2024-06-14 11:46:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178187963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:47,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537095104] [2024-06-14 11:46:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:47,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:47,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 615 transitions, 7493 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:47,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:47,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:47,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:49,051 INFO L124 PetriNetUnfolderBase]: 2756/4851 cut-off events. [2024-06-14 11:46:49,051 INFO L125 PetriNetUnfolderBase]: For 1323424/1323424 co-relation queries the response was YES. [2024-06-14 11:46:49,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41250 conditions, 4851 events. 2756/4851 cut-off events. For 1323424/1323424 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 33932 event pairs, 471 based on Foata normal form. 1/4844 useless extension candidates. Maximal degree in co-relation 41021. Up to 4155 conditions per place. [2024-06-14 11:46:49,133 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 573 selfloop transitions, 51 changer transitions 0/633 dead transitions. [2024-06-14 11:46:49,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 633 transitions, 8872 flow [2024-06-14 11:46:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:46:49,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-14 11:46:49,134 INFO L175 Difference]: Start difference. First operand has 514 places, 615 transitions, 7493 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:46:49,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 633 transitions, 8872 flow [2024-06-14 11:46:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 633 transitions, 8368 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:58,214 INFO L231 Difference]: Finished difference. Result has 518 places, 621 transitions, 7206 flow [2024-06-14 11:46:58,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7206, PETRI_PLACES=518, PETRI_TRANSITIONS=621} [2024-06-14 11:46:58,215 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 473 predicate places. [2024-06-14 11:46:58,215 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 621 transitions, 7206 flow [2024-06-14 11:46:58,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:58,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:58,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 11:46:58,216 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:58,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1209566572, now seen corresponding path program 22 times [2024-06-14 11:46:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383251073] [2024-06-14 11:46:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:58,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:58,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383251073] [2024-06-14 11:46:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383251073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242963449] [2024-06-14 11:46:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:58,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:58,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:46:58,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 621 transitions, 7206 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:58,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:58,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:46:58,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:59,647 INFO L124 PetriNetUnfolderBase]: 2761/4849 cut-off events. [2024-06-14 11:46:59,647 INFO L125 PetriNetUnfolderBase]: For 1335580/1335580 co-relation queries the response was YES. [2024-06-14 11:46:59,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40918 conditions, 4849 events. 2761/4849 cut-off events. For 1335580/1335580 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33974 event pairs, 495 based on Foata normal form. 1/4836 useless extension candidates. Maximal degree in co-relation 40688. Up to 3910 conditions per place. [2024-06-14 11:46:59,728 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 420 selfloop transitions, 210 changer transitions 0/639 dead transitions. [2024-06-14 11:46:59,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 639 transitions, 9627 flow [2024-06-14 11:46:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:46:59,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:46:59,730 INFO L175 Difference]: Start difference. First operand has 518 places, 621 transitions, 7206 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:46:59,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 639 transitions, 9627 flow [2024-06-14 11:47:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 639 transitions, 9513 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:09,721 INFO L231 Difference]: Finished difference. Result has 521 places, 624 transitions, 7565 flow [2024-06-14 11:47:09,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7565, PETRI_PLACES=521, PETRI_TRANSITIONS=624} [2024-06-14 11:47:09,722 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 476 predicate places. [2024-06-14 11:47:09,722 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 624 transitions, 7565 flow [2024-06-14 11:47:09,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:09,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:09,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:09,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 11:47:09,722 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:09,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1222899052, now seen corresponding path program 23 times [2024-06-14 11:47:09,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:09,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662989131] [2024-06-14 11:47:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:09,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:09,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662989131] [2024-06-14 11:47:09,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662989131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:09,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:09,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113503778] [2024-06-14 11:47:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:09,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:09,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:09,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:09,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:47:09,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 624 transitions, 7565 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:09,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:09,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:47:09,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:11,156 INFO L124 PetriNetUnfolderBase]: 2758/4845 cut-off events. [2024-06-14 11:47:11,156 INFO L125 PetriNetUnfolderBase]: For 1335117/1335117 co-relation queries the response was YES. [2024-06-14 11:47:11,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41139 conditions, 4845 events. 2758/4845 cut-off events. For 1335117/1335117 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 33918 event pairs, 495 based on Foata normal form. 1/4832 useless extension candidates. Maximal degree in co-relation 40908. Up to 3907 conditions per place. [2024-06-14 11:47:11,247 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 212 changer transitions 0/638 dead transitions. [2024-06-14 11:47:11,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 638 transitions, 9579 flow [2024-06-14 11:47:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:47:11,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:47:11,248 INFO L175 Difference]: Start difference. First operand has 521 places, 624 transitions, 7565 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:47:11,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 638 transitions, 9579 flow [2024-06-14 11:47:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 638 transitions, 9053 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:19,873 INFO L231 Difference]: Finished difference. Result has 524 places, 624 transitions, 7469 flow [2024-06-14 11:47:19,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7469, PETRI_PLACES=524, PETRI_TRANSITIONS=624} [2024-06-14 11:47:19,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-14 11:47:19,874 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 624 transitions, 7469 flow [2024-06-14 11:47:19,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:19,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:19,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:19,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 11:47:19,875 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1192572106, now seen corresponding path program 24 times [2024-06-14 11:47:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:19,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703784533] [2024-06-14 11:47:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:19,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:19,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703784533] [2024-06-14 11:47:19,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703784533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:19,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:19,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204671659] [2024-06-14 11:47:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:20,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:47:20,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 624 transitions, 7469 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:20,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:47:20,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:21,249 INFO L124 PetriNetUnfolderBase]: 2763/4854 cut-off events. [2024-06-14 11:47:21,249 INFO L125 PetriNetUnfolderBase]: For 1348319/1348319 co-relation queries the response was YES. [2024-06-14 11:47:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41206 conditions, 4854 events. 2763/4854 cut-off events. For 1348319/1348319 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33996 event pairs, 495 based on Foata normal form. 1/4841 useless extension candidates. Maximal degree in co-relation 40974. Up to 3913 conditions per place. [2024-06-14 11:47:21,331 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 423 selfloop transitions, 210 changer transitions 0/642 dead transitions. [2024-06-14 11:47:21,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 642 transitions, 9908 flow [2024-06-14 11:47:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:47:21,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:47:21,333 INFO L175 Difference]: Start difference. First operand has 524 places, 624 transitions, 7469 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:47:21,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 642 transitions, 9908 flow [2024-06-14 11:47:30,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 642 transitions, 9432 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:30,733 INFO L231 Difference]: Finished difference. Result has 524 places, 627 transitions, 7466 flow [2024-06-14 11:47:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6999, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7466, PETRI_PLACES=524, PETRI_TRANSITIONS=627} [2024-06-14 11:47:30,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-14 11:47:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 627 transitions, 7466 flow [2024-06-14 11:47:30,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:30,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:30,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 11:47:30,749 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1360904852, now seen corresponding path program 25 times [2024-06-14 11:47:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26909353] [2024-06-14 11:47:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:30,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26909353] [2024-06-14 11:47:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26909353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:30,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905951608] [2024-06-14 11:47:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:30,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:30,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:30,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:47:30,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 627 transitions, 7466 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:30,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:30,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:47:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:32,202 INFO L124 PetriNetUnfolderBase]: 2760/4850 cut-off events. [2024-06-14 11:47:32,202 INFO L125 PetriNetUnfolderBase]: For 1345489/1345489 co-relation queries the response was YES. [2024-06-14 11:47:32,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41047 conditions, 4850 events. 2760/4850 cut-off events. For 1345489/1345489 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33984 event pairs, 495 based on Foata normal form. 1/4837 useless extension candidates. Maximal degree in co-relation 40814. Up to 3910 conditions per place. [2024-06-14 11:47:32,284 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 424 selfloop transitions, 209 changer transitions 0/642 dead transitions. [2024-06-14 11:47:32,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 642 transitions, 9864 flow [2024-06-14 11:47:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:47:32,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 11:47:32,286 INFO L175 Difference]: Start difference. First operand has 524 places, 627 transitions, 7466 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:47:32,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 642 transitions, 9864 flow [2024-06-14 11:47:41,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 642 transitions, 9182 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:41,380 INFO L231 Difference]: Finished difference. Result has 524 places, 627 transitions, 7208 flow [2024-06-14 11:47:41,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6784, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7208, PETRI_PLACES=524, PETRI_TRANSITIONS=627} [2024-06-14 11:47:41,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 479 predicate places. [2024-06-14 11:47:41,381 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 627 transitions, 7208 flow [2024-06-14 11:47:41,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:41,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:41,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:41,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 11:47:41,381 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:41,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:41,382 INFO L85 PathProgramCache]: Analyzing trace with hash 716534070, now seen corresponding path program 26 times [2024-06-14 11:47:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:41,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378343883] [2024-06-14 11:47:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:41,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378343883] [2024-06-14 11:47:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378343883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:41,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:41,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:41,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404420007] [2024-06-14 11:47:41,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:41,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:41,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:41,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:41,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:47:41,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 627 transitions, 7208 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:41,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:41,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:47:41,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:42,804 INFO L124 PetriNetUnfolderBase]: 2757/4857 cut-off events. [2024-06-14 11:47:42,804 INFO L125 PetriNetUnfolderBase]: For 1340900/1340900 co-relation queries the response was YES. [2024-06-14 11:47:42,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40716 conditions, 4857 events. 2757/4857 cut-off events. For 1340900/1340900 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34067 event pairs, 471 based on Foata normal form. 1/4850 useless extension candidates. Maximal degree in co-relation 40483. Up to 4143 conditions per place. [2024-06-14 11:47:42,894 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 568 selfloop transitions, 63 changer transitions 0/640 dead transitions. [2024-06-14 11:47:42,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 640 transitions, 8868 flow [2024-06-14 11:47:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:47:42,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 11:47:42,895 INFO L175 Difference]: Start difference. First operand has 524 places, 627 transitions, 7208 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:47:42,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 640 transitions, 8868 flow [2024-06-14 11:47:53,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 640 transitions, 8418 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:53,447 INFO L231 Difference]: Finished difference. Result has 527 places, 627 transitions, 6890 flow [2024-06-14 11:47:53,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6890, PETRI_PLACES=527, PETRI_TRANSITIONS=627} [2024-06-14 11:47:53,448 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 482 predicate places. [2024-06-14 11:47:53,448 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 627 transitions, 6890 flow [2024-06-14 11:47:53,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:53,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:53,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 11:47:53,449 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:53,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1576606262, now seen corresponding path program 27 times [2024-06-14 11:47:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:53,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730115410] [2024-06-14 11:47:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:53,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730115410] [2024-06-14 11:47:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730115410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:53,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:53,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92087181] [2024-06-14 11:47:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:53,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:53,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:47:53,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 627 transitions, 6890 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:53,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:53,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:47:53,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:54,797 INFO L124 PetriNetUnfolderBase]: 2754/4853 cut-off events. [2024-06-14 11:47:54,797 INFO L125 PetriNetUnfolderBase]: For 1336997/1336997 co-relation queries the response was YES. [2024-06-14 11:47:54,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40238 conditions, 4853 events. 2754/4853 cut-off events. For 1336997/1336997 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33997 event pairs, 471 based on Foata normal form. 1/4846 useless extension candidates. Maximal degree in co-relation 40004. Up to 4140 conditions per place. [2024-06-14 11:47:54,887 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 569 selfloop transitions, 64 changer transitions 0/642 dead transitions. [2024-06-14 11:47:54,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 642 transitions, 8560 flow [2024-06-14 11:47:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:47:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:47:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-14 11:47:54,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 11:47:54,888 INFO L175 Difference]: Start difference. First operand has 527 places, 627 transitions, 6890 flow. Second operand 10 states and 232 transitions. [2024-06-14 11:47:54,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 642 transitions, 8560 flow [2024-06-14 11:48:06,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 642 transitions, 8276 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:48:06,377 INFO L231 Difference]: Finished difference. Result has 528 places, 627 transitions, 6740 flow [2024-06-14 11:48:06,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6740, PETRI_PLACES=528, PETRI_TRANSITIONS=627} [2024-06-14 11:48:06,378 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-14 11:48:06,378 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 627 transitions, 6740 flow [2024-06-14 11:48:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:06,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:06,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:06,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 11:48:06,379 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:06,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1799943532, now seen corresponding path program 28 times [2024-06-14 11:48:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:06,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498141349] [2024-06-14 11:48:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:06,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:06,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498141349] [2024-06-14 11:48:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498141349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:06,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003160633] [2024-06-14 11:48:06,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:06,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:06,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:48:06,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 627 transitions, 6740 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:06,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:06,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:48:06,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:07,867 INFO L124 PetriNetUnfolderBase]: 2751/4856 cut-off events. [2024-06-14 11:48:07,867 INFO L125 PetriNetUnfolderBase]: For 1332839/1332839 co-relation queries the response was YES. [2024-06-14 11:48:07,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40039 conditions, 4856 events. 2751/4856 cut-off events. For 1332839/1332839 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34045 event pairs, 461 based on Foata normal form. 1/4853 useless extension candidates. Maximal degree in co-relation 39804. Up to 4165 conditions per place. [2024-06-14 11:48:07,958 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 578 selfloop transitions, 54 changer transitions 0/641 dead transitions. [2024-06-14 11:48:07,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 641 transitions, 8780 flow [2024-06-14 11:48:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:48:07,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-14 11:48:07,959 INFO L175 Difference]: Start difference. First operand has 528 places, 627 transitions, 6740 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:48:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 641 transitions, 8780 flow [2024-06-14 11:48:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 641 transitions, 8616 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:17,459 INFO L231 Difference]: Finished difference. Result has 528 places, 627 transitions, 6690 flow [2024-06-14 11:48:17,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6690, PETRI_PLACES=528, PETRI_TRANSITIONS=627} [2024-06-14 11:48:17,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-14 11:48:17,460 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 627 transitions, 6690 flow [2024-06-14 11:48:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:17,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:17,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 11:48:17,461 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:17,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 311345812, now seen corresponding path program 29 times [2024-06-14 11:48:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132415249] [2024-06-14 11:48:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:17,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132415249] [2024-06-14 11:48:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132415249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:17,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209693809] [2024-06-14 11:48:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:17,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:48:17,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 627 transitions, 6690 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:17,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:17,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:48:17,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:18,755 INFO L124 PetriNetUnfolderBase]: 2748/4852 cut-off events. [2024-06-14 11:48:18,756 INFO L125 PetriNetUnfolderBase]: For 1329080/1329080 co-relation queries the response was YES. [2024-06-14 11:48:18,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39852 conditions, 4852 events. 2748/4852 cut-off events. For 1329080/1329080 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34010 event pairs, 461 based on Foata normal form. 1/4849 useless extension candidates. Maximal degree in co-relation 39616. Up to 4162 conditions per place. [2024-06-14 11:48:19,002 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 578 selfloop transitions, 55 changer transitions 0/642 dead transitions. [2024-06-14 11:48:19,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 642 transitions, 8364 flow [2024-06-14 11:48:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 11:48:19,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 11:48:19,003 INFO L175 Difference]: Start difference. First operand has 528 places, 627 transitions, 6690 flow. Second operand 10 states and 230 transitions. [2024-06-14 11:48:19,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 642 transitions, 8364 flow [2024-06-14 11:48:28,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 642 transitions, 8144 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:28,301 INFO L231 Difference]: Finished difference. Result has 531 places, 627 transitions, 6586 flow [2024-06-14 11:48:28,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6586, PETRI_PLACES=531, PETRI_TRANSITIONS=627} [2024-06-14 11:48:28,301 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 486 predicate places. [2024-06-14 11:48:28,301 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 627 transitions, 6586 flow [2024-06-14 11:48:28,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:28,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:28,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 11:48:28,302 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:28,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1804705132, now seen corresponding path program 30 times [2024-06-14 11:48:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:28,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064932726] [2024-06-14 11:48:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:28,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064932726] [2024-06-14 11:48:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064932726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:28,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061321772] [2024-06-14 11:48:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:28,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:48:28,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 627 transitions, 6586 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:28,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:28,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:48:28,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:29,695 INFO L124 PetriNetUnfolderBase]: 2745/4851 cut-off events. [2024-06-14 11:48:29,696 INFO L125 PetriNetUnfolderBase]: For 1324565/1324565 co-relation queries the response was YES. [2024-06-14 11:48:29,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39656 conditions, 4851 events. 2745/4851 cut-off events. For 1324565/1324565 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 34016 event pairs, 457 based on Foata normal form. 1/4850 useless extension candidates. Maximal degree in co-relation 39419. Up to 4207 conditions per place. [2024-06-14 11:48:29,779 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 611 selfloop transitions, 19 changer transitions 0/639 dead transitions. [2024-06-14 11:48:29,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 639 transitions, 7874 flow [2024-06-14 11:48:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:48:29,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198863636363636 [2024-06-14 11:48:29,780 INFO L175 Difference]: Start difference. First operand has 531 places, 627 transitions, 6586 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:48:29,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 639 transitions, 7874 flow [2024-06-14 11:48:38,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 639 transitions, 7636 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-14 11:48:39,001 INFO L231 Difference]: Finished difference. Result has 527 places, 627 transitions, 6392 flow [2024-06-14 11:48:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=527, PETRI_TRANSITIONS=627} [2024-06-14 11:48:39,002 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 482 predicate places. [2024-06-14 11:48:39,002 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 627 transitions, 6392 flow [2024-06-14 11:48:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:39,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:39,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 11:48:39,002 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1192088816, now seen corresponding path program 4 times [2024-06-14 11:48:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417176112] [2024-06-14 11:48:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:39,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417176112] [2024-06-14 11:48:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417176112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:39,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098980275] [2024-06-14 11:48:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:39,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:39,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:48:39,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 627 transitions, 6392 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:39,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:39,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:48:39,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:40,472 INFO L124 PetriNetUnfolderBase]: 2732/4820 cut-off events. [2024-06-14 11:48:40,472 INFO L125 PetriNetUnfolderBase]: For 1316453/1316453 co-relation queries the response was YES. [2024-06-14 11:48:40,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37883 conditions, 4820 events. 2732/4820 cut-off events. For 1316453/1316453 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 33814 event pairs, 456 based on Foata normal form. 6/4818 useless extension candidates. Maximal degree in co-relation 37646. Up to 4027 conditions per place. [2024-06-14 11:48:40,558 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 584 selfloop transitions, 53 changer transitions 0/646 dead transitions. [2024-06-14 11:48:40,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 646 transitions, 7764 flow [2024-06-14 11:48:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 11:48:40,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 11:48:40,559 INFO L175 Difference]: Start difference. First operand has 527 places, 627 transitions, 6392 flow. Second operand 8 states and 194 transitions. [2024-06-14 11:48:40,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 646 transitions, 7764 flow [2024-06-14 11:48:49,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 646 transitions, 7682 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 11:48:49,138 INFO L231 Difference]: Finished difference. Result has 526 places, 627 transitions, 6420 flow [2024-06-14 11:48:49,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=526, PETRI_TRANSITIONS=627} [2024-06-14 11:48:49,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 481 predicate places. [2024-06-14 11:48:49,139 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 627 transitions, 6420 flow [2024-06-14 11:48:49,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:49,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:49,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:49,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 11:48:49,139 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:49,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash -37199276, now seen corresponding path program 5 times [2024-06-14 11:48:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53679781] [2024-06-14 11:48:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:49,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:49,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53679781] [2024-06-14 11:48:49,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53679781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:49,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:49,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662429329] [2024-06-14 11:48:49,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:49,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:48:49,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 627 transitions, 6420 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:49,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:49,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:48:49,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:50,597 INFO L124 PetriNetUnfolderBase]: 2753/4853 cut-off events. [2024-06-14 11:48:50,597 INFO L125 PetriNetUnfolderBase]: For 1296994/1296994 co-relation queries the response was YES. [2024-06-14 11:48:50,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38798 conditions, 4853 events. 2753/4853 cut-off events. For 1296994/1296994 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 33985 event pairs, 451 based on Foata normal form. 2/4850 useless extension candidates. Maximal degree in co-relation 38560. Up to 4118 conditions per place. [2024-06-14 11:48:50,681 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 616 selfloop transitions, 34 changer transitions 0/659 dead transitions. [2024-06-14 11:48:50,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 659 transitions, 8308 flow [2024-06-14 11:48:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 11:48:50,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-14 11:48:50,683 INFO L175 Difference]: Start difference. First operand has 526 places, 627 transitions, 6420 flow. Second operand 9 states and 221 transitions. [2024-06-14 11:48:50,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 659 transitions, 8308 flow [2024-06-14 11:49:01,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 659 transitions, 8169 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:01,593 INFO L231 Difference]: Finished difference. Result has 529 places, 631 transitions, 6498 flow [2024-06-14 11:49:01,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6498, PETRI_PLACES=529, PETRI_TRANSITIONS=631} [2024-06-14 11:49:01,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 484 predicate places. [2024-06-14 11:49:01,594 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 631 transitions, 6498 flow [2024-06-14 11:49:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 11:49:01,594 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:01,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1391548678, now seen corresponding path program 6 times [2024-06-14 11:49:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:01,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427130779] [2024-06-14 11:49:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:01,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427130779] [2024-06-14 11:49:01,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427130779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:01,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:01,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740672594] [2024-06-14 11:49:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:01,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:01,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:49:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 631 transitions, 6498 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:01,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:49:01,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:03,094 INFO L124 PetriNetUnfolderBase]: 2748/4851 cut-off events. [2024-06-14 11:49:03,108 INFO L125 PetriNetUnfolderBase]: For 1274034/1274034 co-relation queries the response was YES. [2024-06-14 11:49:03,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38355 conditions, 4851 events. 2748/4851 cut-off events. For 1274034/1274034 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 34058 event pairs, 457 based on Foata normal form. 2/4848 useless extension candidates. Maximal degree in co-relation 38116. Up to 4140 conditions per place. [2024-06-14 11:49:03,256 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 614 selfloop transitions, 30 changer transitions 0/653 dead transitions. [2024-06-14 11:49:03,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 653 transitions, 7840 flow [2024-06-14 11:49:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:49:03,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 11:49:03,257 INFO L175 Difference]: Start difference. First operand has 529 places, 631 transitions, 6498 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:49:03,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 653 transitions, 7840 flow [2024-06-14 11:49:14,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 653 transitions, 7649 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:14,843 INFO L231 Difference]: Finished difference. Result has 531 places, 631 transitions, 6372 flow [2024-06-14 11:49:14,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6372, PETRI_PLACES=531, PETRI_TRANSITIONS=631} [2024-06-14 11:49:14,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 486 predicate places. [2024-06-14 11:49:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 631 transitions, 6372 flow [2024-06-14 11:49:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:14,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:14,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 11:49:14,845 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:14,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -34337356, now seen corresponding path program 7 times [2024-06-14 11:49:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31934967] [2024-06-14 11:49:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:14,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:14,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31934967] [2024-06-14 11:49:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31934967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:14,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:14,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599383624] [2024-06-14 11:49:14,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:14,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:49:15,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 631 transitions, 6372 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:15,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:49:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:16,166 INFO L124 PetriNetUnfolderBase]: 2753/4860 cut-off events. [2024-06-14 11:49:16,166 INFO L125 PetriNetUnfolderBase]: For 1265813/1265813 co-relation queries the response was YES. [2024-06-14 11:49:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38190 conditions, 4860 events. 2753/4860 cut-off events. For 1265813/1265813 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 34106 event pairs, 457 based on Foata normal form. 1/4856 useless extension candidates. Maximal degree in co-relation 37950. Up to 4150 conditions per place. [2024-06-14 11:49:16,258 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 615 selfloop transitions, 31 changer transitions 0/655 dead transitions. [2024-06-14 11:49:16,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 655 transitions, 7776 flow [2024-06-14 11:49:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:49:16,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 11:49:16,259 INFO L175 Difference]: Start difference. First operand has 531 places, 631 transitions, 6372 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:49:16,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 655 transitions, 7776 flow [2024-06-14 11:49:27,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 655 transitions, 7711 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:49:27,597 INFO L231 Difference]: Finished difference. Result has 532 places, 634 transitions, 6441 flow [2024-06-14 11:49:27,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6441, PETRI_PLACES=532, PETRI_TRANSITIONS=634} [2024-06-14 11:49:27,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 487 predicate places. [2024-06-14 11:49:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 634 transitions, 6441 flow [2024-06-14 11:49:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:27,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 11:49:27,599 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:27,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1437874698, now seen corresponding path program 7 times [2024-06-14 11:49:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050831271] [2024-06-14 11:49:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:27,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050831271] [2024-06-14 11:49:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050831271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:27,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:27,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405803312] [2024-06-14 11:49:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:27,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:27,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:27,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:27,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:49:27,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 634 transitions, 6441 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:27,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:27,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:49:27,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:28,983 INFO L124 PetriNetUnfolderBase]: 2761/4874 cut-off events. [2024-06-14 11:49:28,983 INFO L125 PetriNetUnfolderBase]: For 1298459/1298459 co-relation queries the response was YES. [2024-06-14 11:49:29,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 4874 events. 2761/4874 cut-off events. For 1298459/1298459 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 34240 event pairs, 462 based on Foata normal form. 2/4869 useless extension candidates. Maximal degree in co-relation 38182. Up to 4084 conditions per place. [2024-06-14 11:49:29,068 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 556 selfloop transitions, 90 changer transitions 0/655 dead transitions. [2024-06-14 11:49:29,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 655 transitions, 7851 flow [2024-06-14 11:49:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:49:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 11:49:29,070 INFO L175 Difference]: Start difference. First operand has 532 places, 634 transitions, 6441 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:49:29,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 655 transitions, 7851 flow [2024-06-14 11:49:40,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 655 transitions, 7751 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:40,558 INFO L231 Difference]: Finished difference. Result has 534 places, 636 transitions, 6602 flow [2024-06-14 11:49:40,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6602, PETRI_PLACES=534, PETRI_TRANSITIONS=636} [2024-06-14 11:49:40,558 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 489 predicate places. [2024-06-14 11:49:40,558 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 636 transitions, 6602 flow [2024-06-14 11:49:40,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:40,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:40,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 11:49:40,559 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:40,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1437869738, now seen corresponding path program 8 times [2024-06-14 11:49:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:40,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896801426] [2024-06-14 11:49:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:40,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896801426] [2024-06-14 11:49:40,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896801426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:40,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:40,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348139236] [2024-06-14 11:49:40,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:40,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:49:40,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 636 transitions, 6602 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:40,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:40,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:49:40,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:41,924 INFO L124 PetriNetUnfolderBase]: 2774/4894 cut-off events. [2024-06-14 11:49:41,925 INFO L125 PetriNetUnfolderBase]: For 1312129/1312129 co-relation queries the response was YES. [2024-06-14 11:49:41,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39038 conditions, 4894 events. 2774/4894 cut-off events. For 1312129/1312129 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 34389 event pairs, 466 based on Foata normal form. 1/4886 useless extension candidates. Maximal degree in co-relation 38796. Up to 3966 conditions per place. [2024-06-14 11:49:42,013 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 505 selfloop transitions, 150 changer transitions 0/664 dead transitions. [2024-06-14 11:49:42,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 664 transitions, 9648 flow [2024-06-14 11:49:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 11:49:42,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:49:42,014 INFO L175 Difference]: Start difference. First operand has 534 places, 636 transitions, 6602 flow. Second operand 8 states and 206 transitions. [2024-06-14 11:49:42,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 664 transitions, 9648 flow [2024-06-14 11:49:54,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 664 transitions, 9403 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:54,348 INFO L231 Difference]: Finished difference. Result has 536 places, 642 transitions, 6795 flow [2024-06-14 11:49:54,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6357, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6795, PETRI_PLACES=536, PETRI_TRANSITIONS=642} [2024-06-14 11:49:54,348 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 491 predicate places. [2024-06-14 11:49:54,348 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 642 transitions, 6795 flow [2024-06-14 11:49:54,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:54,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:54,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:54,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 11:49:54,349 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:54,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash 253259188, now seen corresponding path program 9 times [2024-06-14 11:49:54,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:54,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113543802] [2024-06-14 11:49:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113543802] [2024-06-14 11:49:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113543802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:54,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:54,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238570478] [2024-06-14 11:49:54,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:54,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:54,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:54,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:49:54,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 642 transitions, 6795 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:54,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:54,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:49:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:55,761 INFO L124 PetriNetUnfolderBase]: 2771/4890 cut-off events. [2024-06-14 11:49:55,761 INFO L125 PetriNetUnfolderBase]: For 1305756/1305756 co-relation queries the response was YES. [2024-06-14 11:49:55,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38873 conditions, 4890 events. 2771/4890 cut-off events. For 1305756/1305756 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 34376 event pairs, 466 based on Foata normal form. 1/4882 useless extension candidates. Maximal degree in co-relation 38630. Up to 3963 conditions per place. [2024-06-14 11:49:55,845 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 502 selfloop transitions, 152 changer transitions 0/663 dead transitions. [2024-06-14 11:49:55,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 663 transitions, 9323 flow [2024-06-14 11:49:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 11:49:55,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 11:49:55,846 INFO L175 Difference]: Start difference. First operand has 536 places, 642 transitions, 6795 flow. Second operand 8 states and 204 transitions. [2024-06-14 11:49:55,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 663 transitions, 9323 flow [2024-06-14 11:50:07,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 663 transitions, 8869 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 11:50:07,984 INFO L231 Difference]: Finished difference. Result has 539 places, 642 transitions, 6651 flow [2024-06-14 11:50:07,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6651, PETRI_PLACES=539, PETRI_TRANSITIONS=642} [2024-06-14 11:50:07,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 494 predicate places. [2024-06-14 11:50:07,985 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 642 transitions, 6651 flow [2024-06-14 11:50:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:07,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:07,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:07,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 11:50:07,986 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:07,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash -274257324, now seen corresponding path program 8 times [2024-06-14 11:50:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:07,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228094498] [2024-06-14 11:50:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:07,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:08,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228094498] [2024-06-14 11:50:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228094498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:08,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:08,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:08,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732981928] [2024-06-14 11:50:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:08,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:50:08,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 642 transitions, 6651 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:08,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:08,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:50:08,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:09,409 INFO L124 PetriNetUnfolderBase]: 2792/4924 cut-off events. [2024-06-14 11:50:09,409 INFO L125 PetriNetUnfolderBase]: For 1377534/1377534 co-relation queries the response was YES. [2024-06-14 11:50:09,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39653 conditions, 4924 events. 2792/4924 cut-off events. For 1377534/1377534 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 34626 event pairs, 455 based on Foata normal form. 2/4921 useless extension candidates. Maximal degree in co-relation 39409. Up to 4161 conditions per place. [2024-06-14 11:50:09,498 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 619 selfloop transitions, 47 changer transitions 0/675 dead transitions. [2024-06-14 11:50:09,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 675 transitions, 8597 flow [2024-06-14 11:50:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-14 11:50:09,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-14 11:50:09,499 INFO L175 Difference]: Start difference. First operand has 539 places, 642 transitions, 6651 flow. Second operand 10 states and 241 transitions. [2024-06-14 11:50:09,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 675 transitions, 8597 flow [2024-06-14 11:50:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 675 transitions, 8241 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:21,744 INFO L231 Difference]: Finished difference. Result has 541 places, 646 transitions, 6550 flow [2024-06-14 11:50:21,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6295, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6550, PETRI_PLACES=541, PETRI_TRANSITIONS=646} [2024-06-14 11:50:21,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 496 predicate places. [2024-06-14 11:50:21,745 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 646 transitions, 6550 flow [2024-06-14 11:50:21,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:21,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:21,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:21,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 11:50:21,746 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:21,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 860544664, now seen corresponding path program 9 times [2024-06-14 11:50:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:21,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499159995] [2024-06-14 11:50:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:21,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499159995] [2024-06-14 11:50:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499159995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:21,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813650849] [2024-06-14 11:50:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:21,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:21,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:21,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:50:21,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 646 transitions, 6550 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:21,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:21,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:50:21,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:23,137 INFO L124 PetriNetUnfolderBase]: 2800/4941 cut-off events. [2024-06-14 11:50:23,137 INFO L125 PetriNetUnfolderBase]: For 1393279/1393279 co-relation queries the response was YES. [2024-06-14 11:50:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39794 conditions, 4941 events. 2800/4941 cut-off events. For 1393279/1393279 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 34765 event pairs, 462 based on Foata normal form. 2/4938 useless extension candidates. Maximal degree in co-relation 39549. Up to 4204 conditions per place. [2024-06-14 11:50:23,237 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 620 selfloop transitions, 43 changer transitions 0/672 dead transitions. [2024-06-14 11:50:23,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 672 transitions, 8014 flow [2024-06-14 11:50:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 11:50:23,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 11:50:23,238 INFO L175 Difference]: Start difference. First operand has 541 places, 646 transitions, 6550 flow. Second operand 10 states and 236 transitions. [2024-06-14 11:50:23,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 672 transitions, 8014 flow [2024-06-14 11:50:35,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 672 transitions, 7818 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:35,573 INFO L231 Difference]: Finished difference. Result has 545 places, 648 transitions, 6529 flow [2024-06-14 11:50:35,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6529, PETRI_PLACES=545, PETRI_TRANSITIONS=648} [2024-06-14 11:50:35,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 500 predicate places. [2024-06-14 11:50:35,574 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 648 transitions, 6529 flow [2024-06-14 11:50:35,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:35,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:35,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:35,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 11:50:35,574 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:35,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 540471898, now seen corresponding path program 10 times [2024-06-14 11:50:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:35,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062954285] [2024-06-14 11:50:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:35,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062954285] [2024-06-14 11:50:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062954285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24572929] [2024-06-14 11:50:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:35,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:50:35,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 648 transitions, 6529 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:35,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:35,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:50:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:37,096 INFO L124 PetriNetUnfolderBase]: 2805/4950 cut-off events. [2024-06-14 11:50:37,096 INFO L125 PetriNetUnfolderBase]: For 1384479/1384479 co-relation queries the response was YES. [2024-06-14 11:50:37,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39742 conditions, 4950 events. 2805/4950 cut-off events. For 1384479/1384479 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 34876 event pairs, 462 based on Foata normal form. 1/4946 useless extension candidates. Maximal degree in co-relation 39495. Up to 4199 conditions per place. [2024-06-14 11:50:37,190 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 614 selfloop transitions, 52 changer transitions 0/675 dead transitions. [2024-06-14 11:50:37,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 675 transitions, 8386 flow [2024-06-14 11:50:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 11:50:37,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-14 11:50:37,192 INFO L175 Difference]: Start difference. First operand has 545 places, 648 transitions, 6529 flow. Second operand 10 states and 239 transitions. [2024-06-14 11:50:37,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 675 transitions, 8386 flow [2024-06-14 11:50:46,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 675 transitions, 8233 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:46,493 INFO L231 Difference]: Finished difference. Result has 548 places, 651 transitions, 6570 flow [2024-06-14 11:50:46,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6570, PETRI_PLACES=548, PETRI_TRANSITIONS=651} [2024-06-14 11:50:46,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 503 predicate places. [2024-06-14 11:50:46,494 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 651 transitions, 6570 flow [2024-06-14 11:50:46,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:46,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:46,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:46,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 11:50:46,495 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:46,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1202782804, now seen corresponding path program 10 times [2024-06-14 11:50:46,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:46,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924374223] [2024-06-14 11:50:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:46,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924374223] [2024-06-14 11:50:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924374223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:46,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:46,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742395516] [2024-06-14 11:50:46,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:46,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:46,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 11:50:46,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 651 transitions, 6570 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:46,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:46,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 11:50:46,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:47,971 INFO L124 PetriNetUnfolderBase]: 2826/4985 cut-off events. [2024-06-14 11:50:47,972 INFO L125 PetriNetUnfolderBase]: For 1459317/1459317 co-relation queries the response was YES. [2024-06-14 11:50:48,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40597 conditions, 4985 events. 2826/4985 cut-off events. For 1459317/1459317 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 35141 event pairs, 374 based on Foata normal form. 2/4982 useless extension candidates. Maximal degree in co-relation 40348. Up to 4065 conditions per place. [2024-06-14 11:50:48,065 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 613 selfloop transitions, 66 changer transitions 0/688 dead transitions. [2024-06-14 11:50:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 688 transitions, 9020 flow [2024-06-14 11:50:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:50:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:50:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 11:50:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-14 11:50:48,066 INFO L175 Difference]: Start difference. First operand has 548 places, 651 transitions, 6570 flow. Second operand 9 states and 224 transitions. [2024-06-14 11:50:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 688 transitions, 9020 flow Killed by 15