./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:50:06,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:50:06,706 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:50:06,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:50:06,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:50:06,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:50:06,735 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:50:06,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:50:06,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:50:06,739 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:50:06,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:50:06,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:50:06,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:50:06,741 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:50:06,742 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:50:06,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:50:06,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:50:06,742 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:50:06,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:50:06,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:50:06,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:50:06,743 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:50:06,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:50:06,743 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:50:06,744 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:50:06,744 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:50:06,744 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:50:06,744 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:50:06,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:50:06,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:50:06,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:50:06,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:50:06,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:50:06,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:50:06,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:50:06,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:50:06,747 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:50:06,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:50:06,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:50:06,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:50:06,747 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:50:06,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:50:06,748 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:50:06,748 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:50:06,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:50:06,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:50:06,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:50:06,922 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:50:06,922 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:50:06,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 12:50:07,064 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:50:07,069 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:50:07,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:50:08,043 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:50:08,264 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:50:08,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:50:08,276 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3a828d8/b5550272ac754edfa805a2dba2f2a561/FLAGa11c5d1c4 [2024-05-12 12:50:08,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3a828d8/b5550272ac754edfa805a2dba2f2a561 [2024-05-12 12:50:08,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:50:08,288 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:50:08,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:50:08,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:50:08,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:50:08,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:50:07" (1/2) ... [2024-05-12 12:50:08,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f6c95b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:50:08, skipping insertion in model container [2024-05-12 12:50:08,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:50:07" (1/2) ... [2024-05-12 12:50:08,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ad15dc6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:50:08, skipping insertion in model container [2024-05-12 12:50:08,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:50:08" (2/2) ... [2024-05-12 12:50:08,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f6c95b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08, skipping insertion in model container [2024-05-12 12:50:08,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:50:08" (2/2) ... [2024-05-12 12:50:08,298 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:50:08,348 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:50:08,349 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-05-12 12:50:08,349 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-05-12 12:50:08,349 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-05-12 12:50:08,350 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 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))) [2024-05-12 12:50:08,350 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:50:08,350 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-05-12 12:50:08,388 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:50:08,530 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 12:50:08,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:50:08,679 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:50:08,708 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:50:08,763 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:50:08,793 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:50:08,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08 WrapperNode [2024-05-12 12:50:08,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:50:08,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:50:08,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:50:08,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:50:08,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,835 INFO L138 Inliner]: procedures = 177, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2024-05-12 12:50:08,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:50:08,835 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:50:08,835 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:50:08,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:50:08,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,847 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,863 INFO L175 MemorySlicer]: Split 6 memory accesses to 5 slices as follows [2, 1, 1, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-05-12 12:50:08,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,879 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,882 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:50:08,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:50:08,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:50:08,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:50:08,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (1/1) ... [2024-05-12 12:50:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:50:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:50:08,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 12:50:08,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 12:50:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:50:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:50:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:50:08,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:50:08,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:50:08,945 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:50:08,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:50:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:50:08,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:50:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-05-12 12:50:08,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-05-12 12:50:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:50:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:50:08,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:50:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:50:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 12:50:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:50:08,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:50:08,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:50:08,948 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:50:09,043 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:50:09,044 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:50:09,260 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:50:09,261 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:50:09,345 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:50:09,346 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:50:09,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:50:09 BoogieIcfgContainer [2024-05-12 12:50:09,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:50:09,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:50:09,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:50:09,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:50:09,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:50:07" (1/4) ... [2024-05-12 12:50:09,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd73817 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:50:09, skipping insertion in model container [2024-05-12 12:50:09,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:50:08" (2/4) ... [2024-05-12 12:50:09,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd73817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:50:09, skipping insertion in model container [2024-05-12 12:50:09,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:50:08" (3/4) ... [2024-05-12 12:50:09,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd73817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:50:09, skipping insertion in model container [2024-05-12 12:50:09,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:50:09" (4/4) ... [2024-05-12 12:50:09,360 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:50:09,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:50:09,373 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 12:50:09,373 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:50:09,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:50:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 57 transitions, 130 flow [2024-05-12 12:50:09,477 INFO L124 PetriNetUnfolderBase]: 1/53 cut-off events. [2024-05-12 12:50:09,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:50:09,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 53 events. 1/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-05-12 12:50:09,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 57 transitions, 130 flow [2024-05-12 12:50:09,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 50 transitions, 112 flow [2024-05-12 12:50:09,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:50:09,502 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;@78493929, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:50:09,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 12:50:09,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:50:09,505 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:50:09,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:50:09,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:09,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:50:09,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:09,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1293459917, now seen corresponding path program 1 times [2024-05-12 12:50:09,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852767514] [2024-05-12 12:50:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852767514] [2024-05-12 12:50:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852767514] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:10,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:10,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:50:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601120535] [2024-05-12 12:50:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:50:10,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:50:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:50:10,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 57 [2024-05-12 12:50:10,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:10,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:10,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 57 [2024-05-12 12:50:10,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:10,748 INFO L124 PetriNetUnfolderBase]: 4259/6302 cut-off events. [2024-05-12 12:50:10,748 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-05-12 12:50:10,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12352 conditions, 6302 events. 4259/6302 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37205 event pairs, 2762 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 12336. Up to 5859 conditions per place. [2024-05-12 12:50:10,791 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 43 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2024-05-12 12:50:10,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 249 flow [2024-05-12 12:50:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:50:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:50:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2024-05-12 12:50:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7076023391812866 [2024-05-12 12:50:10,803 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 112 flow. Second operand 3 states and 121 transitions. [2024-05-12 12:50:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 249 flow [2024-05-12 12:50:10,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 242 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:10,811 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 147 flow [2024-05-12 12:50:10,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-05-12 12:50:10,816 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2024-05-12 12:50:10,817 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 147 flow [2024-05-12 12:50:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:10,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:10,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:10,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:50:10,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:10,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 982618392, now seen corresponding path program 1 times [2024-05-12 12:50:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247844198] [2024-05-12 12:50:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247844198] [2024-05-12 12:50:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247844198] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:11,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:11,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:50:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695526416] [2024-05-12 12:50:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:50:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:50:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:50:11,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:11,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:11,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:11,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:11,849 INFO L124 PetriNetUnfolderBase]: 6869/10034 cut-off events. [2024-05-12 12:50:11,849 INFO L125 PetriNetUnfolderBase]: For 1539/1561 co-relation queries the response was YES. [2024-05-12 12:50:11,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22350 conditions, 10034 events. 6869/10034 cut-off events. For 1539/1561 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 60754 event pairs, 3338 based on Foata normal form. 10/10034 useless extension candidates. Maximal degree in co-relation 22335. Up to 9309 conditions per place. [2024-05-12 12:50:11,945 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 62 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-05-12 12:50:11,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 380 flow [2024-05-12 12:50:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-05-12 12:50:11,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2024-05-12 12:50:11,956 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 147 flow. Second operand 4 states and 155 transitions. [2024-05-12 12:50:11,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 380 flow [2024-05-12 12:50:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:11,959 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 218 flow [2024-05-12 12:50:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-05-12 12:50:11,960 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2024-05-12 12:50:11,960 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 218 flow [2024-05-12 12:50:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:11,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:50:11,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:11,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1652300875, now seen corresponding path program 1 times [2024-05-12 12:50:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252011130] [2024-05-12 12:50:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:11,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:12,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252011130] [2024-05-12 12:50:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252011130] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:12,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250769145] [2024-05-12 12:50:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:12,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 12:50:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:13,039 INFO L124 PetriNetUnfolderBase]: 6853/10624 cut-off events. [2024-05-12 12:50:13,039 INFO L125 PetriNetUnfolderBase]: For 4710/4793 co-relation queries the response was YES. [2024-05-12 12:50:13,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25498 conditions, 10624 events. 6853/10624 cut-off events. For 4710/4793 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 68987 event pairs, 3391 based on Foata normal form. 32/10578 useless extension candidates. Maximal degree in co-relation 25480. Up to 9235 conditions per place. [2024-05-12 12:50:13,093 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 71 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-05-12 12:50:13,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 480 flow [2024-05-12 12:50:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-05-12 12:50:13,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596491228070176 [2024-05-12 12:50:13,094 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 218 flow. Second operand 5 states and 188 transitions. [2024-05-12 12:50:13,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 480 flow [2024-05-12 12:50:13,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 99 transitions, 476 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 12:50:13,097 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 264 flow [2024-05-12 12:50:13,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-05-12 12:50:13,098 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2024-05-12 12:50:13,098 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 264 flow [2024-05-12 12:50:13,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 12:50:13,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:13,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:13,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:50:13,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:13,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:13,100 INFO L85 PathProgramCache]: Analyzing trace with hash -601180441, now seen corresponding path program 1 times [2024-05-12 12:50:13,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:13,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849815371] [2024-05-12 12:50:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:13,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849815371] [2024-05-12 12:50:13,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849815371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:13,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:13,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:50:13,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311064098] [2024-05-12 12:50:13,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:13,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:50:13,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:50:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:50:13,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:13,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:13,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:13,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:14,210 INFO L124 PetriNetUnfolderBase]: 6790/10431 cut-off events. [2024-05-12 12:50:14,210 INFO L125 PetriNetUnfolderBase]: For 8318/8328 co-relation queries the response was YES. [2024-05-12 12:50:14,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27188 conditions, 10431 events. 6790/10431 cut-off events. For 8318/8328 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 67429 event pairs, 4062 based on Foata normal form. 6/10359 useless extension candidates. Maximal degree in co-relation 27167. Up to 9204 conditions per place. [2024-05-12 12:50:14,271 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 69 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-05-12 12:50:14,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 536 flow [2024-05-12 12:50:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-05-12 12:50:14,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-05-12 12:50:14,273 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 264 flow. Second operand 4 states and 150 transitions. [2024-05-12 12:50:14,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 536 flow [2024-05-12 12:50:14,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 500 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:14,281 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 341 flow [2024-05-12 12:50:14,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=341, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-05-12 12:50:14,282 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-05-12 12:50:14,282 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 341 flow [2024-05-12 12:50:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:14,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:14,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:50:14,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:14,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1908703180, now seen corresponding path program 1 times [2024-05-12 12:50:14,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478230609] [2024-05-12 12:50:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:14,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478230609] [2024-05-12 12:50:14,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478230609] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:14,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:14,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:14,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690623255] [2024-05-12 12:50:14,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:14,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:14,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:14,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:14,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:14,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:14,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:14,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:15,306 INFO L124 PetriNetUnfolderBase]: 8211/11971 cut-off events. [2024-05-12 12:50:15,306 INFO L125 PetriNetUnfolderBase]: For 15586/15857 co-relation queries the response was YES. [2024-05-12 12:50:15,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35247 conditions, 11971 events. 8211/11971 cut-off events. For 15586/15857 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 74021 event pairs, 3222 based on Foata normal form. 69/11966 useless extension candidates. Maximal degree in co-relation 35224. Up to 10972 conditions per place. [2024-05-12 12:50:15,400 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 76 selfloop transitions, 25 changer transitions 0/119 dead transitions. [2024-05-12 12:50:15,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 709 flow [2024-05-12 12:50:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-05-12 12:50:15,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2024-05-12 12:50:15,402 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 341 flow. Second operand 5 states and 192 transitions. [2024-05-12 12:50:15,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 709 flow [2024-05-12 12:50:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 701 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-05-12 12:50:15,415 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 454 flow [2024-05-12 12:50:15,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-05-12 12:50:15,416 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-05-12 12:50:15,417 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 454 flow [2024-05-12 12:50:15,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:15,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:15,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:50:15,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:15,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -188653108, now seen corresponding path program 2 times [2024-05-12 12:50:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:15,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708835478] [2024-05-12 12:50:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:15,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708835478] [2024-05-12 12:50:15,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708835478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:15,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:15,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185413294] [2024-05-12 12:50:15,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:15,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:15,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:15,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:15,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 454 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:15,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:15,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:15,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:16,449 INFO L124 PetriNetUnfolderBase]: 8202/11959 cut-off events. [2024-05-12 12:50:16,449 INFO L125 PetriNetUnfolderBase]: For 24241/24562 co-relation queries the response was YES. [2024-05-12 12:50:16,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38537 conditions, 11959 events. 8202/11959 cut-off events. For 24241/24562 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 74010 event pairs, 3222 based on Foata normal form. 79/11966 useless extension candidates. Maximal degree in co-relation 38511. Up to 10982 conditions per place. [2024-05-12 12:50:16,528 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 68 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-05-12 12:50:16,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 107 transitions, 694 flow [2024-05-12 12:50:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-05-12 12:50:16,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2024-05-12 12:50:16,530 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 454 flow. Second operand 4 states and 155 transitions. [2024-05-12 12:50:16,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 107 transitions, 694 flow [2024-05-12 12:50:16,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 651 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:16,552 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 471 flow [2024-05-12 12:50:16,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=471, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-05-12 12:50:16,553 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2024-05-12 12:50:16,553 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 471 flow [2024-05-12 12:50:16,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:16,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:16,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:16,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:50:16,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:16,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:16,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1905193724, now seen corresponding path program 1 times [2024-05-12 12:50:16,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:16,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097251386] [2024-05-12 12:50:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:16,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097251386] [2024-05-12 12:50:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097251386] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:16,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:16,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229810981] [2024-05-12 12:50:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:16,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:16,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:16,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:16,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:16,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:17,492 INFO L124 PetriNetUnfolderBase]: 6813/10461 cut-off events. [2024-05-12 12:50:17,493 INFO L125 PetriNetUnfolderBase]: For 22156/22199 co-relation queries the response was YES. [2024-05-12 12:50:17,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 10461 events. 6813/10461 cut-off events. For 22156/22199 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67747 event pairs, 3766 based on Foata normal form. 19/10397 useless extension candidates. Maximal degree in co-relation 32875. Up to 9195 conditions per place. [2024-05-12 12:50:17,560 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 87 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-05-12 12:50:17,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 117 transitions, 776 flow [2024-05-12 12:50:17,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-05-12 12:50:17,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6456140350877193 [2024-05-12 12:50:17,562 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 471 flow. Second operand 5 states and 184 transitions. [2024-05-12 12:50:17,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 117 transitions, 776 flow [2024-05-12 12:50:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 734 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:17,572 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 495 flow [2024-05-12 12:50:17,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=495, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-05-12 12:50:17,573 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2024-05-12 12:50:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 495 flow [2024-05-12 12:50:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:17,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:50:17,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -959742978, now seen corresponding path program 1 times [2024-05-12 12:50:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622309886] [2024-05-12 12:50:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:17,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622309886] [2024-05-12 12:50:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622309886] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:17,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:17,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:17,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139466523] [2024-05-12 12:50:17,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:17,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:17,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:17,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:17,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 495 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:17,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:17,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:17,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:18,889 INFO L124 PetriNetUnfolderBase]: 8661/13194 cut-off events. [2024-05-12 12:50:18,889 INFO L125 PetriNetUnfolderBase]: For 33889/34040 co-relation queries the response was YES. [2024-05-12 12:50:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42934 conditions, 13194 events. 8661/13194 cut-off events. For 33889/34040 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 85688 event pairs, 4322 based on Foata normal form. 40/13120 useless extension candidates. Maximal degree in co-relation 42905. Up to 11498 conditions per place. [2024-05-12 12:50:18,974 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 108 selfloop transitions, 27 changer transitions 0/150 dead transitions. [2024-05-12 12:50:18,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 150 transitions, 1051 flow [2024-05-12 12:50:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-05-12 12:50:18,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652046783625731 [2024-05-12 12:50:18,976 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 495 flow. Second operand 6 states and 223 transitions. [2024-05-12 12:50:18,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 150 transitions, 1051 flow [2024-05-12 12:50:18,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1011 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:18,997 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 683 flow [2024-05-12 12:50:18,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=683, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-05-12 12:50:18,998 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 24 predicate places. [2024-05-12 12:50:18,998 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 683 flow [2024-05-12 12:50:18,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:18,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:18,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:18,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:50:18,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:18,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:18,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1553272886, now seen corresponding path program 2 times [2024-05-12 12:50:19,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:19,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249710563] [2024-05-12 12:50:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:19,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:19,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249710563] [2024-05-12 12:50:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249710563] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:19,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703409272] [2024-05-12 12:50:19,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:19,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:19,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 683 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:19,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:19,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:19,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:20,324 INFO L124 PetriNetUnfolderBase]: 8691/13314 cut-off events. [2024-05-12 12:50:20,324 INFO L125 PetriNetUnfolderBase]: For 44600/44932 co-relation queries the response was YES. [2024-05-12 12:50:20,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46105 conditions, 13314 events. 8691/13314 cut-off events. For 44600/44932 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 87187 event pairs, 4306 based on Foata normal form. 81/13298 useless extension candidates. Maximal degree in co-relation 46073. Up to 11567 conditions per place. [2024-05-12 12:50:20,420 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 124 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-05-12 12:50:20,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 165 transitions, 1228 flow [2024-05-12 12:50:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2024-05-12 12:50:20,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-05-12 12:50:20,422 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 683 flow. Second operand 7 states and 255 transitions. [2024-05-12 12:50:20,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 165 transitions, 1228 flow [2024-05-12 12:50:20,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 165 transitions, 1174 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:20,457 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 759 flow [2024-05-12 12:50:20,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=759, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2024-05-12 12:50:20,458 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 30 predicate places. [2024-05-12 12:50:20,458 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 759 flow [2024-05-12 12:50:20,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:20,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:20,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:50:20,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:20,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1553278466, now seen corresponding path program 3 times [2024-05-12 12:50:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396771995] [2024-05-12 12:50:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:20,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:20,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396771995] [2024-05-12 12:50:20,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396771995] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:20,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:20,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:20,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136943629] [2024-05-12 12:50:20,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:20,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:20,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:20,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 759 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:20,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:20,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:20,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:21,620 INFO L124 PetriNetUnfolderBase]: 8682/13170 cut-off events. [2024-05-12 12:50:21,620 INFO L125 PetriNetUnfolderBase]: For 48021/48251 co-relation queries the response was YES. [2024-05-12 12:50:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46140 conditions, 13170 events. 8682/13170 cut-off events. For 48021/48251 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 85026 event pairs, 4334 based on Foata normal form. 65/13131 useless extension candidates. Maximal degree in co-relation 46106. Up to 11558 conditions per place. [2024-05-12 12:50:21,717 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 103 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-05-12 12:50:21,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 143 transitions, 1104 flow [2024-05-12 12:50:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-05-12 12:50:21,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656140350877193 [2024-05-12 12:50:21,718 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 759 flow. Second operand 5 states and 187 transitions. [2024-05-12 12:50:21,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 143 transitions, 1104 flow [2024-05-12 12:50:21,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 143 transitions, 1012 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:21,790 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 728 flow [2024-05-12 12:50:21,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=728, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-05-12 12:50:21,791 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-05-12 12:50:21,792 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 728 flow [2024-05-12 12:50:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:21,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:50:21,793 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:21,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:21,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1965272691, now seen corresponding path program 1 times [2024-05-12 12:50:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676121754] [2024-05-12 12:50:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:21,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:21,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676121754] [2024-05-12 12:50:21,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676121754] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:21,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:21,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:50:21,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207862344] [2024-05-12 12:50:21,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:21,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:50:21,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:50:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:50:22,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:22,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:22,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:22,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:22,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:22,846 INFO L124 PetriNetUnfolderBase]: 8070/11688 cut-off events. [2024-05-12 12:50:22,847 INFO L125 PetriNetUnfolderBase]: For 50381/50426 co-relation queries the response was YES. [2024-05-12 12:50:22,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43263 conditions, 11688 events. 8070/11688 cut-off events. For 50381/50426 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 72790 event pairs, 3645 based on Foata normal form. 49/11698 useless extension candidates. Maximal degree in co-relation 43228. Up to 10760 conditions per place. [2024-05-12 12:50:22,909 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 106 selfloop transitions, 14 changer transitions 0/140 dead transitions. [2024-05-12 12:50:22,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 1124 flow [2024-05-12 12:50:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-05-12 12:50:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6403508771929824 [2024-05-12 12:50:22,911 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 728 flow. Second operand 4 states and 146 transitions. [2024-05-12 12:50:22,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 1124 flow [2024-05-12 12:50:22,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1068 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:22,956 INFO L231 Difference]: Finished difference. Result has 95 places, 121 transitions, 851 flow [2024-05-12 12:50:22,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=851, PETRI_PLACES=95, PETRI_TRANSITIONS=121} [2024-05-12 12:50:22,957 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2024-05-12 12:50:22,957 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 121 transitions, 851 flow [2024-05-12 12:50:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:22,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:22,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:50:22,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1328717301, now seen corresponding path program 1 times [2024-05-12 12:50:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718142886] [2024-05-12 12:50:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:23,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:23,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718142886] [2024-05-12 12:50:23,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718142886] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:23,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:23,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:23,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595343800] [2024-05-12 12:50:23,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:23,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:23,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:23,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:23,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 121 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:23,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:24,170 INFO L124 PetriNetUnfolderBase]: 9764/14074 cut-off events. [2024-05-12 12:50:24,171 INFO L125 PetriNetUnfolderBase]: For 83929/84284 co-relation queries the response was YES. [2024-05-12 12:50:24,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57778 conditions, 14074 events. 9764/14074 cut-off events. For 83929/84284 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 88095 event pairs, 2532 based on Foata normal form. 102/13822 useless extension candidates. Maximal degree in co-relation 57741. Up to 12559 conditions per place. [2024-05-12 12:50:24,271 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 100 selfloop transitions, 49 changer transitions 0/175 dead transitions. [2024-05-12 12:50:24,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 175 transitions, 1397 flow [2024-05-12 12:50:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-05-12 12:50:24,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637426900584795 [2024-05-12 12:50:24,272 INFO L175 Difference]: Start difference. First operand has 95 places, 121 transitions, 851 flow. Second operand 6 states and 227 transitions. [2024-05-12 12:50:24,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 175 transitions, 1397 flow [2024-05-12 12:50:24,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 175 transitions, 1387 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-05-12 12:50:24,387 INFO L231 Difference]: Finished difference. Result has 101 places, 127 transitions, 1023 flow [2024-05-12 12:50:24,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1023, PETRI_PLACES=101, PETRI_TRANSITIONS=127} [2024-05-12 12:50:24,387 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 38 predicate places. [2024-05-12 12:50:24,387 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 127 transitions, 1023 flow [2024-05-12 12:50:24,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:24,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:24,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:24,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:50:24,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:24,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1325860341, now seen corresponding path program 2 times [2024-05-12 12:50:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:24,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334609140] [2024-05-12 12:50:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:24,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334609140] [2024-05-12 12:50:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334609140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:24,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:24,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252546995] [2024-05-12 12:50:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:24,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:24,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:24,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:24,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 127 transitions, 1023 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:24,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:24,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:24,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:25,690 INFO L124 PetriNetUnfolderBase]: 9848/14178 cut-off events. [2024-05-12 12:50:25,691 INFO L125 PetriNetUnfolderBase]: For 105668/106142 co-relation queries the response was YES. [2024-05-12 12:50:25,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61938 conditions, 14178 events. 9848/14178 cut-off events. For 105668/106142 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 88718 event pairs, 3138 based on Foata normal form. 131/13937 useless extension candidates. Maximal degree in co-relation 61898. Up to 12847 conditions per place. [2024-05-12 12:50:25,788 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 103 selfloop transitions, 45 changer transitions 0/174 dead transitions. [2024-05-12 12:50:25,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1467 flow [2024-05-12 12:50:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-05-12 12:50:25,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652046783625731 [2024-05-12 12:50:25,790 INFO L175 Difference]: Start difference. First operand has 101 places, 127 transitions, 1023 flow. Second operand 6 states and 223 transitions. [2024-05-12 12:50:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1467 flow [2024-05-12 12:50:25,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1383 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:25,905 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 1086 flow [2024-05-12 12:50:25,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1086, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2024-05-12 12:50:25,905 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2024-05-12 12:50:25,906 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 1086 flow [2024-05-12 12:50:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:25,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:25,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:25,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:50:25,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:25,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash -906996533, now seen corresponding path program 3 times [2024-05-12 12:50:25,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:25,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253013367] [2024-05-12 12:50:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:25,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:26,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253013367] [2024-05-12 12:50:26,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253013367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:26,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:26,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169245579] [2024-05-12 12:50:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 1086 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:26,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:26,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:27,293 INFO L124 PetriNetUnfolderBase]: 9816/14149 cut-off events. [2024-05-12 12:50:27,293 INFO L125 PetriNetUnfolderBase]: For 113345/113807 co-relation queries the response was YES. [2024-05-12 12:50:27,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62404 conditions, 14149 events. 9816/14149 cut-off events. For 113345/113807 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 88623 event pairs, 2522 based on Foata normal form. 182/13968 useless extension candidates. Maximal degree in co-relation 62362. Up to 12769 conditions per place. [2024-05-12 12:50:27,388 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 98 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-05-12 12:50:27,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1450 flow [2024-05-12 12:50:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-05-12 12:50:27,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 12:50:27,390 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 1086 flow. Second operand 5 states and 190 transitions. [2024-05-12 12:50:27,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1450 flow [2024-05-12 12:50:27,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1333 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:27,501 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1067 flow [2024-05-12 12:50:27,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1067, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-05-12 12:50:27,502 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 43 predicate places. [2024-05-12 12:50:27,502 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1067 flow [2024-05-12 12:50:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:27,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:27,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:50:27,503 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:27,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1759437215, now seen corresponding path program 1 times [2024-05-12 12:50:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106856633] [2024-05-12 12:50:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:27,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106856633] [2024-05-12 12:50:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106856633] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:27,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:27,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556103551] [2024-05-12 12:50:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:27,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:27,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1067 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:27,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:27,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:27,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:29,101 INFO L124 PetriNetUnfolderBase]: 10797/15487 cut-off events. [2024-05-12 12:50:29,101 INFO L125 PetriNetUnfolderBase]: For 116748/117209 co-relation queries the response was YES. [2024-05-12 12:50:29,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66877 conditions, 15487 events. 10797/15487 cut-off events. For 116748/117209 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 96736 event pairs, 2666 based on Foata normal form. 179/15585 useless extension candidates. Maximal degree in co-relation 66834. Up to 13604 conditions per place. [2024-05-12 12:50:29,191 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 147 selfloop transitions, 43 changer transitions 0/207 dead transitions. [2024-05-12 12:50:29,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 207 transitions, 1825 flow [2024-05-12 12:50:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-05-12 12:50:29,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-05-12 12:50:29,192 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1067 flow. Second operand 7 states and 261 transitions. [2024-05-12 12:50:29,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 207 transitions, 1825 flow [2024-05-12 12:50:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 1718 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:29,291 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1207 flow [2024-05-12 12:50:29,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2024-05-12 12:50:29,291 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 48 predicate places. [2024-05-12 12:50:29,291 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1207 flow [2024-05-12 12:50:29,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:29,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:29,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:50:29,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:29,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:29,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1848002975, now seen corresponding path program 2 times [2024-05-12 12:50:29,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785848670] [2024-05-12 12:50:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:29,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785848670] [2024-05-12 12:50:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785848670] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:29,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:29,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:29,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457062174] [2024-05-12 12:50:29,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:29,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:29,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:29,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:29,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:29,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:30,877 INFO L124 PetriNetUnfolderBase]: 11161/16043 cut-off events. [2024-05-12 12:50:30,878 INFO L125 PetriNetUnfolderBase]: For 138669/139198 co-relation queries the response was YES. [2024-05-12 12:50:31,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72248 conditions, 16043 events. 11161/16043 cut-off events. For 138669/139198 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 100569 event pairs, 3338 based on Foata normal form. 199/16161 useless extension candidates. Maximal degree in co-relation 72202. Up to 14418 conditions per place. [2024-05-12 12:50:31,176 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 153 selfloop transitions, 39 changer transitions 0/209 dead transitions. [2024-05-12 12:50:31,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 209 transitions, 1911 flow [2024-05-12 12:50:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-05-12 12:50:31,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-05-12 12:50:31,178 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1207 flow. Second operand 7 states and 261 transitions. [2024-05-12 12:50:31,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 209 transitions, 1911 flow [2024-05-12 12:50:31,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 209 transitions, 1852 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:31,319 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1313 flow [2024-05-12 12:50:31,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1313, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-05-12 12:50:31,319 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 54 predicate places. [2024-05-12 12:50:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1313 flow [2024-05-12 12:50:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:31,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:31,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:50:31,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:31,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 951813617, now seen corresponding path program 3 times [2024-05-12 12:50:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514442937] [2024-05-12 12:50:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:31,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514442937] [2024-05-12 12:50:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514442937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:31,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719115544] [2024-05-12 12:50:31,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:31,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:31,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:31,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:31,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1313 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:31,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:31,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:31,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:33,182 INFO L124 PetriNetUnfolderBase]: 11107/15965 cut-off events. [2024-05-12 12:50:33,182 INFO L125 PetriNetUnfolderBase]: For 148675/149212 co-relation queries the response was YES. [2024-05-12 12:50:33,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72927 conditions, 15965 events. 11107/15965 cut-off events. For 148675/149212 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 100091 event pairs, 3351 based on Foata normal form. 205/16089 useless extension candidates. Maximal degree in co-relation 72878. Up to 14576 conditions per place. [2024-05-12 12:50:33,324 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 151 selfloop transitions, 36 changer transitions 0/204 dead transitions. [2024-05-12 12:50:33,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 204 transitions, 1850 flow [2024-05-12 12:50:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 255 transitions. [2024-05-12 12:50:33,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390977443609023 [2024-05-12 12:50:33,337 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1313 flow. Second operand 7 states and 255 transitions. [2024-05-12 12:50:33,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 204 transitions, 1850 flow [2024-05-12 12:50:33,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 204 transitions, 1781 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:33,565 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 1340 flow [2024-05-12 12:50:33,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1340, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2024-05-12 12:50:33,566 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2024-05-12 12:50:33,566 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 1340 flow [2024-05-12 12:50:33,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:33,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:33,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:50:33,567 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:33,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1953389385, now seen corresponding path program 4 times [2024-05-12 12:50:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592898776] [2024-05-12 12:50:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:33,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:33,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592898776] [2024-05-12 12:50:33,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592898776] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:33,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:33,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049633536] [2024-05-12 12:50:33,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:33,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:33,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 1340 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:33,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:33,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:33,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:35,517 INFO L124 PetriNetUnfolderBase]: 11050/15908 cut-off events. [2024-05-12 12:50:35,517 INFO L125 PetriNetUnfolderBase]: For 155994/156601 co-relation queries the response was YES. [2024-05-12 12:50:35,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73047 conditions, 15908 events. 11050/15908 cut-off events. For 155994/156601 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 99842 event pairs, 3317 based on Foata normal form. 230/16075 useless extension candidates. Maximal degree in co-relation 72996. Up to 14572 conditions per place. [2024-05-12 12:50:35,625 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 168 selfloop transitions, 31 changer transitions 0/216 dead transitions. [2024-05-12 12:50:35,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 216 transitions, 1947 flow [2024-05-12 12:50:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 287 transitions. [2024-05-12 12:50:35,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6293859649122807 [2024-05-12 12:50:35,626 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 1340 flow. Second operand 8 states and 287 transitions. [2024-05-12 12:50:35,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 216 transitions, 1947 flow [2024-05-12 12:50:35,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 216 transitions, 1875 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:35,771 INFO L231 Difference]: Finished difference. Result has 124 places, 149 transitions, 1378 flow [2024-05-12 12:50:35,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=124, PETRI_TRANSITIONS=149} [2024-05-12 12:50:35,772 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2024-05-12 12:50:35,772 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 149 transitions, 1378 flow [2024-05-12 12:50:35,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:35,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:35,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:35,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:50:35,772 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:35,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1948027005, now seen corresponding path program 5 times [2024-05-12 12:50:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824518269] [2024-05-12 12:50:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:35,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:36,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824518269] [2024-05-12 12:50:36,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824518269] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:36,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:36,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106601256] [2024-05-12 12:50:36,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:36,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:36,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:36,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 149 transitions, 1378 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:36,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:36,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:36,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:37,486 INFO L124 PetriNetUnfolderBase]: 11376/16740 cut-off events. [2024-05-12 12:50:37,486 INFO L125 PetriNetUnfolderBase]: For 174951/175302 co-relation queries the response was YES. [2024-05-12 12:50:37,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76739 conditions, 16740 events. 11376/16740 cut-off events. For 174951/175302 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 108986 event pairs, 4631 based on Foata normal form. 131/16764 useless extension candidates. Maximal degree in co-relation 76687. Up to 15009 conditions per place. [2024-05-12 12:50:37,640 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 153 selfloop transitions, 29 changer transitions 0/199 dead transitions. [2024-05-12 12:50:37,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 1909 flow [2024-05-12 12:50:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-05-12 12:50:37,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-05-12 12:50:37,643 INFO L175 Difference]: Start difference. First operand has 124 places, 149 transitions, 1378 flow. Second operand 6 states and 222 transitions. [2024-05-12 12:50:37,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 1909 flow [2024-05-12 12:50:37,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 199 transitions, 1837 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:37,807 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1416 flow [2024-05-12 12:50:37,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1416, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-05-12 12:50:37,807 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2024-05-12 12:50:37,808 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1416 flow [2024-05-12 12:50:37,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:37,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:37,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:37,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:50:37,808 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:37,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1947879135, now seen corresponding path program 6 times [2024-05-12 12:50:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441280281] [2024-05-12 12:50:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441280281] [2024-05-12 12:50:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441280281] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:38,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:38,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:38,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225228470] [2024-05-12 12:50:38,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:38,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:38,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:38,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1416 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:38,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:38,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:38,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:39,566 INFO L124 PetriNetUnfolderBase]: 11337/16629 cut-off events. [2024-05-12 12:50:39,566 INFO L125 PetriNetUnfolderBase]: For 180827/181228 co-relation queries the response was YES. [2024-05-12 12:50:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76443 conditions, 16629 events. 11337/16629 cut-off events. For 180827/181228 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 107535 event pairs, 3916 based on Foata normal form. 187/16705 useless extension candidates. Maximal degree in co-relation 76390. Up to 14476 conditions per place. [2024-05-12 12:50:39,685 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 150 selfloop transitions, 37 changer transitions 0/204 dead transitions. [2024-05-12 12:50:39,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 204 transitions, 1949 flow [2024-05-12 12:50:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 225 transitions. [2024-05-12 12:50:39,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-05-12 12:50:39,687 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1416 flow. Second operand 6 states and 225 transitions. [2024-05-12 12:50:39,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 204 transitions, 1949 flow [2024-05-12 12:50:39,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 1867 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:39,907 INFO L231 Difference]: Finished difference. Result has 127 places, 153 transitions, 1454 flow [2024-05-12 12:50:39,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1454, PETRI_PLACES=127, PETRI_TRANSITIONS=153} [2024-05-12 12:50:39,908 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 64 predicate places. [2024-05-12 12:50:39,908 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 153 transitions, 1454 flow [2024-05-12 12:50:39,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:39,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:39,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:39,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:50:39,908 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:39,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1953604587, now seen corresponding path program 1 times [2024-05-12 12:50:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:39,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537540832] [2024-05-12 12:50:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:40,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:40,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537540832] [2024-05-12 12:50:40,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537540832] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:40,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:40,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:40,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68809820] [2024-05-12 12:50:40,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:40,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:40,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:40,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:40,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 153 transitions, 1454 flow. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:40,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:40,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:40,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:41,717 INFO L124 PetriNetUnfolderBase]: 11087/16323 cut-off events. [2024-05-12 12:50:41,717 INFO L125 PetriNetUnfolderBase]: For 186632/186999 co-relation queries the response was YES. [2024-05-12 12:50:41,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75170 conditions, 16323 events. 11087/16323 cut-off events. For 186632/186999 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 105896 event pairs, 4260 based on Foata normal form. 174/16402 useless extension candidates. Maximal degree in co-relation 75115. Up to 14195 conditions per place. [2024-05-12 12:50:41,855 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 170 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-05-12 12:50:41,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 225 transitions, 2047 flow [2024-05-12 12:50:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 289 transitions. [2024-05-12 12:50:41,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337719298245614 [2024-05-12 12:50:41,856 INFO L175 Difference]: Start difference. First operand has 127 places, 153 transitions, 1454 flow. Second operand 8 states and 289 transitions. [2024-05-12 12:50:41,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 225 transitions, 2047 flow [2024-05-12 12:50:42,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 225 transitions, 1912 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:42,080 INFO L231 Difference]: Finished difference. Result has 129 places, 154 transitions, 1394 flow [2024-05-12 12:50:42,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=129, PETRI_TRANSITIONS=154} [2024-05-12 12:50:42,080 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 66 predicate places. [2024-05-12 12:50:42,080 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 154 transitions, 1394 flow [2024-05-12 12:50:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 8 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:42,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:42,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:42,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:50:42,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:42,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:42,081 INFO L85 PathProgramCache]: Analyzing trace with hash 614940210, now seen corresponding path program 1 times [2024-05-12 12:50:42,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:42,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366625714] [2024-05-12 12:50:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:42,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:42,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:42,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366625714] [2024-05-12 12:50:42,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366625714] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:42,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:42,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28917200] [2024-05-12 12:50:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:42,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:42,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:42,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 154 transitions, 1394 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:42,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:42,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:42,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:43,404 INFO L124 PetriNetUnfolderBase]: 9016/13069 cut-off events. [2024-05-12 12:50:43,405 INFO L125 PetriNetUnfolderBase]: For 162118/162553 co-relation queries the response was YES. [2024-05-12 12:50:43,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63395 conditions, 13069 events. 9016/13069 cut-off events. For 162118/162553 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 81555 event pairs, 2905 based on Foata normal form. 60/13094 useless extension candidates. Maximal degree in co-relation 63340. Up to 12186 conditions per place. [2024-05-12 12:50:43,503 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 140 selfloop transitions, 33 changer transitions 0/191 dead transitions. [2024-05-12 12:50:43,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 191 transitions, 1994 flow [2024-05-12 12:50:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-05-12 12:50:43,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2024-05-12 12:50:43,504 INFO L175 Difference]: Start difference. First operand has 129 places, 154 transitions, 1394 flow. Second operand 5 states and 183 transitions. [2024-05-12 12:50:43,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 191 transitions, 1994 flow [2024-05-12 12:50:43,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 191 transitions, 1905 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:43,648 INFO L231 Difference]: Finished difference. Result has 128 places, 162 transitions, 1488 flow [2024-05-12 12:50:43,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1488, PETRI_PLACES=128, PETRI_TRANSITIONS=162} [2024-05-12 12:50:43,649 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 65 predicate places. [2024-05-12 12:50:43,649 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 162 transitions, 1488 flow [2024-05-12 12:50:43,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:43,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:43,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:43,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:50:43,649 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:43,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash 656604210, now seen corresponding path program 2 times [2024-05-12 12:50:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:43,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527720944] [2024-05-12 12:50:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:43,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:43,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527720944] [2024-05-12 12:50:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527720944] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:43,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:43,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168077221] [2024-05-12 12:50:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:43,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:43,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 162 transitions, 1488 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:43,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:43,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:43,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:44,992 INFO L124 PetriNetUnfolderBase]: 9009/13060 cut-off events. [2024-05-12 12:50:44,993 INFO L125 PetriNetUnfolderBase]: For 181307/181778 co-relation queries the response was YES. [2024-05-12 12:50:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65629 conditions, 13060 events. 9009/13060 cut-off events. For 181307/181778 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 81758 event pairs, 2905 based on Foata normal form. 64/13090 useless extension candidates. Maximal degree in co-relation 65573. Up to 12192 conditions per place. [2024-05-12 12:50:45,099 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 136 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-05-12 12:50:45,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 1870 flow [2024-05-12 12:50:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-05-12 12:50:45,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-05-12 12:50:45,100 INFO L175 Difference]: Start difference. First operand has 128 places, 162 transitions, 1488 flow. Second operand 4 states and 150 transitions. [2024-05-12 12:50:45,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 1870 flow [2024-05-12 12:50:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 183 transitions, 1777 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:45,328 INFO L231 Difference]: Finished difference. Result has 131 places, 162 transitions, 1469 flow [2024-05-12 12:50:45,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1469, PETRI_PLACES=131, PETRI_TRANSITIONS=162} [2024-05-12 12:50:45,329 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 68 predicate places. [2024-05-12 12:50:45,329 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 162 transitions, 1469 flow [2024-05-12 12:50:45,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:45,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:45,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:45,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:50:45,329 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:45,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1867239894, now seen corresponding path program 1 times [2024-05-12 12:50:45,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:45,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415874334] [2024-05-12 12:50:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:45,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:45,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415874334] [2024-05-12 12:50:45,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415874334] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:45,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980126372] [2024-05-12 12:50:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:45,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:50:45,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 162 transitions, 1469 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:45,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:45,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:50:45,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:46,813 INFO L124 PetriNetUnfolderBase]: 9530/14214 cut-off events. [2024-05-12 12:50:46,813 INFO L125 PetriNetUnfolderBase]: For 182848/182980 co-relation queries the response was YES. [2024-05-12 12:50:46,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65938 conditions, 14214 events. 9530/14214 cut-off events. For 182848/182980 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 93931 event pairs, 4564 based on Foata normal form. 139/14247 useless extension candidates. Maximal degree in co-relation 65880. Up to 12775 conditions per place. [2024-05-12 12:50:46,918 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 153 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2024-05-12 12:50:46,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 1901 flow [2024-05-12 12:50:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-05-12 12:50:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175438596491228 [2024-05-12 12:50:46,919 INFO L175 Difference]: Start difference. First operand has 131 places, 162 transitions, 1469 flow. Second operand 5 states and 176 transitions. [2024-05-12 12:50:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 1901 flow [2024-05-12 12:50:47,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1843 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:47,088 INFO L231 Difference]: Finished difference. Result has 133 places, 165 transitions, 1485 flow [2024-05-12 12:50:47,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1485, PETRI_PLACES=133, PETRI_TRANSITIONS=165} [2024-05-12 12:50:47,088 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 70 predicate places. [2024-05-12 12:50:47,089 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 165 transitions, 1485 flow [2024-05-12 12:50:47,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:47,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:47,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:47,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:50:47,089 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:47,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash -857342920, now seen corresponding path program 1 times [2024-05-12 12:50:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689685423] [2024-05-12 12:50:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:47,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689685423] [2024-05-12 12:50:47,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689685423] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:47,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:47,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740199885] [2024-05-12 12:50:47,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:47,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:47,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:50:47,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 165 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:47,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:47,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:50:47,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:48,811 INFO L124 PetriNetUnfolderBase]: 12199/17803 cut-off events. [2024-05-12 12:50:48,811 INFO L125 PetriNetUnfolderBase]: For 236232/236250 co-relation queries the response was YES. [2024-05-12 12:50:48,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83647 conditions, 17803 events. 12199/17803 cut-off events. For 236232/236250 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 114865 event pairs, 5355 based on Foata normal form. 10/17715 useless extension candidates. Maximal degree in co-relation 83588. Up to 16339 conditions per place. [2024-05-12 12:50:48,973 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 189 selfloop transitions, 26 changer transitions 0/229 dead transitions. [2024-05-12 12:50:48,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 229 transitions, 2313 flow [2024-05-12 12:50:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-05-12 12:50:48,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-05-12 12:50:48,974 INFO L175 Difference]: Start difference. First operand has 133 places, 165 transitions, 1485 flow. Second operand 6 states and 209 transitions. [2024-05-12 12:50:48,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 229 transitions, 2313 flow [2024-05-12 12:50:49,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 229 transitions, 2256 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:49,315 INFO L231 Difference]: Finished difference. Result has 139 places, 188 transitions, 1738 flow [2024-05-12 12:50:49,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1738, PETRI_PLACES=139, PETRI_TRANSITIONS=188} [2024-05-12 12:50:49,315 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 76 predicate places. [2024-05-12 12:50:49,316 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 188 transitions, 1738 flow [2024-05-12 12:50:49,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:49,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:49,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:50:49,316 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:49,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2133723662, now seen corresponding path program 2 times [2024-05-12 12:50:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448127206] [2024-05-12 12:50:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448127206] [2024-05-12 12:50:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448127206] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:49,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:49,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:49,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801646083] [2024-05-12 12:50:49,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:49,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:49,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:50:49,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 188 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:49,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:49,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:50:49,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:51,336 INFO L124 PetriNetUnfolderBase]: 12223/17611 cut-off events. [2024-05-12 12:50:51,336 INFO L125 PetriNetUnfolderBase]: For 256582/256588 co-relation queries the response was YES. [2024-05-12 12:50:51,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86916 conditions, 17611 events. 12223/17611 cut-off events. For 256582/256588 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 111867 event pairs, 5360 based on Foata normal form. 6/17558 useless extension candidates. Maximal degree in co-relation 86853. Up to 16364 conditions per place. [2024-05-12 12:50:51,512 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 179 selfloop transitions, 30 changer transitions 0/223 dead transitions. [2024-05-12 12:50:51,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 223 transitions, 2384 flow [2024-05-12 12:50:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-05-12 12:50:51,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6105263157894737 [2024-05-12 12:50:51,514 INFO L175 Difference]: Start difference. First operand has 139 places, 188 transitions, 1738 flow. Second operand 5 states and 174 transitions. [2024-05-12 12:50:51,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 223 transitions, 2384 flow [2024-05-12 12:50:51,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 223 transitions, 2352 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-05-12 12:50:51,946 INFO L231 Difference]: Finished difference. Result has 145 places, 194 transitions, 1847 flow [2024-05-12 12:50:51,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1847, PETRI_PLACES=145, PETRI_TRANSITIONS=194} [2024-05-12 12:50:51,947 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 82 predicate places. [2024-05-12 12:50:51,947 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 194 transitions, 1847 flow [2024-05-12 12:50:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:51,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:51,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:50:51,947 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:51,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2133734822, now seen corresponding path program 3 times [2024-05-12 12:50:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341214641] [2024-05-12 12:50:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:52,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341214641] [2024-05-12 12:50:52,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341214641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:52,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:52,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:52,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784790370] [2024-05-12 12:50:52,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:52,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:50:52,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 194 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:52,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:52,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:50:52,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:53,866 INFO L124 PetriNetUnfolderBase]: 12216/17832 cut-off events. [2024-05-12 12:50:53,866 INFO L125 PetriNetUnfolderBase]: For 272097/272127 co-relation queries the response was YES. [2024-05-12 12:50:53,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87994 conditions, 17832 events. 12216/17832 cut-off events. For 272097/272127 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 115342 event pairs, 5355 based on Foata normal form. 18/17752 useless extension candidates. Maximal degree in co-relation 87927. Up to 16357 conditions per place. [2024-05-12 12:50:54,016 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 181 selfloop transitions, 31 changer transitions 0/226 dead transitions. [2024-05-12 12:50:54,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 2353 flow [2024-05-12 12:50:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 12:50:54,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624561403508772 [2024-05-12 12:50:54,019 INFO L175 Difference]: Start difference. First operand has 145 places, 194 transitions, 1847 flow. Second operand 5 states and 178 transitions. [2024-05-12 12:50:54,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 2353 flow [2024-05-12 12:50:54,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 226 transitions, 2293 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:54,438 INFO L231 Difference]: Finished difference. Result has 149 places, 194 transitions, 1863 flow [2024-05-12 12:50:54,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1863, PETRI_PLACES=149, PETRI_TRANSITIONS=194} [2024-05-12 12:50:54,439 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 86 predicate places. [2024-05-12 12:50:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 194 transitions, 1863 flow [2024-05-12 12:50:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:54,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:54,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:54,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:50:54,439 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:54,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:54,439 INFO L85 PathProgramCache]: Analyzing trace with hash 350027902, now seen corresponding path program 1 times [2024-05-12 12:50:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:54,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532921317] [2024-05-12 12:50:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532921317] [2024-05-12 12:50:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532921317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:54,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:54,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:54,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509267328] [2024-05-12 12:50:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:54,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:54,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 194 transitions, 1863 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:54,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:54,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:54,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:56,090 INFO L124 PetriNetUnfolderBase]: 10034/14365 cut-off events. [2024-05-12 12:50:56,090 INFO L125 PetriNetUnfolderBase]: For 242978/242987 co-relation queries the response was YES. [2024-05-12 12:50:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74496 conditions, 14365 events. 10034/14365 cut-off events. For 242978/242987 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 88330 event pairs, 3445 based on Foata normal form. 6/14356 useless extension candidates. Maximal degree in co-relation 74427. Up to 13480 conditions per place. [2024-05-12 12:50:56,200 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 200 selfloop transitions, 33 changer transitions 0/248 dead transitions. [2024-05-12 12:50:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 248 transitions, 2674 flow [2024-05-12 12:50:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-05-12 12:50:56,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169590643274854 [2024-05-12 12:50:56,201 INFO L175 Difference]: Start difference. First operand has 149 places, 194 transitions, 1863 flow. Second operand 6 states and 211 transitions. [2024-05-12 12:50:56,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 248 transitions, 2674 flow [2024-05-12 12:50:56,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 248 transitions, 2626 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:56,424 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 2077 flow [2024-05-12 12:50:56,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2077, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2024-05-12 12:50:56,425 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 91 predicate places. [2024-05-12 12:50:56,425 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 2077 flow [2024-05-12 12:50:56,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:56,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:56,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:56,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:50:56,426 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:56,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:56,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1120098358, now seen corresponding path program 2 times [2024-05-12 12:50:56,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:56,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854317875] [2024-05-12 12:50:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:56,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:56,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854317875] [2024-05-12 12:50:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854317875] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:56,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431155148] [2024-05-12 12:50:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:56,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:56,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:56,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:56,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 2077 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:56,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:56,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:56,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:58,149 INFO L124 PetriNetUnfolderBase]: 10058/14622 cut-off events. [2024-05-12 12:50:58,149 INFO L125 PetriNetUnfolderBase]: For 252195/252207 co-relation queries the response was YES. [2024-05-12 12:50:58,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77498 conditions, 14622 events. 10058/14622 cut-off events. For 252195/252207 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 91914 event pairs, 4601 based on Foata normal form. 10/14549 useless extension candidates. Maximal degree in co-relation 77427. Up to 13531 conditions per place. [2024-05-12 12:50:58,284 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 211 selfloop transitions, 33 changer transitions 0/259 dead transitions. [2024-05-12 12:50:58,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 259 transitions, 2841 flow [2024-05-12 12:50:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2024-05-12 12:50:58,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6015037593984962 [2024-05-12 12:50:58,285 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 2077 flow. Second operand 7 states and 240 transitions. [2024-05-12 12:50:58,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 259 transitions, 2841 flow [2024-05-12 12:50:58,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 259 transitions, 2757 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:58,617 INFO L231 Difference]: Finished difference. Result has 160 places, 217 transitions, 2143 flow [2024-05-12 12:50:58,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=160, PETRI_TRANSITIONS=217} [2024-05-12 12:50:58,619 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 97 predicate places. [2024-05-12 12:50:58,619 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 217 transitions, 2143 flow [2024-05-12 12:50:58,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:58,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:58,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:58,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:50:58,620 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:58,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1120103938, now seen corresponding path program 3 times [2024-05-12 12:50:58,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512860701] [2024-05-12 12:50:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512860701] [2024-05-12 12:50:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512860701] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:58,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570540698] [2024-05-12 12:50:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:58,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:50:58,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 217 transitions, 2143 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:58,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:58,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:50:58,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:00,241 INFO L124 PetriNetUnfolderBase]: 10051/14394 cut-off events. [2024-05-12 12:51:00,241 INFO L125 PetriNetUnfolderBase]: For 261921/261933 co-relation queries the response was YES. [2024-05-12 12:51:00,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77118 conditions, 14394 events. 10051/14394 cut-off events. For 261921/261933 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 88445 event pairs, 3445 based on Foata normal form. 8/14387 useless extension candidates. Maximal degree in co-relation 77045. Up to 13524 conditions per place. [2024-05-12 12:51:00,368 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 199 selfloop transitions, 31 changer transitions 0/245 dead transitions. [2024-05-12 12:51:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 245 transitions, 2675 flow [2024-05-12 12:51:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:51:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:51:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-05-12 12:51:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280701754385964 [2024-05-12 12:51:00,369 INFO L175 Difference]: Start difference. First operand has 160 places, 217 transitions, 2143 flow. Second operand 5 states and 179 transitions. [2024-05-12 12:51:00,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 245 transitions, 2675 flow [2024-05-12 12:51:00,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 245 transitions, 2565 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:00,722 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2104 flow [2024-05-12 12:51:00,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2104, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-05-12 12:51:00,723 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 98 predicate places. [2024-05-12 12:51:00,723 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2104 flow [2024-05-12 12:51:00,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:00,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:00,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:00,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:51:00,723 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:00,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash -551781228, now seen corresponding path program 1 times [2024-05-12 12:51:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:00,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829875016] [2024-05-12 12:51:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:00,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829875016] [2024-05-12 12:51:00,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829875016] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:00,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:51:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410202124] [2024-05-12 12:51:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:51:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:51:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:51:00,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:51:00,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2104 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:00,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:00,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:51:00,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:02,424 INFO L124 PetriNetUnfolderBase]: 11250/16339 cut-off events. [2024-05-12 12:51:02,425 INFO L125 PetriNetUnfolderBase]: For 353283/353574 co-relation queries the response was YES. [2024-05-12 12:51:02,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88113 conditions, 16339 events. 11250/16339 cut-off events. For 353283/353574 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 105030 event pairs, 4863 based on Foata normal form. 95/16087 useless extension candidates. Maximal degree in co-relation 88039. Up to 14595 conditions per place. [2024-05-12 12:51:02,578 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 184 selfloop transitions, 18 changer transitions 0/251 dead transitions. [2024-05-12 12:51:02,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 251 transitions, 2762 flow [2024-05-12 12:51:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:51:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:51:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-05-12 12:51:02,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618421052631579 [2024-05-12 12:51:02,579 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2104 flow. Second operand 4 states and 141 transitions. [2024-05-12 12:51:02,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 251 transitions, 2762 flow [2024-05-12 12:51:03,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 251 transitions, 2692 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:03,065 INFO L231 Difference]: Finished difference. Result has 162 places, 234 transitions, 2327 flow [2024-05-12 12:51:03,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2327, PETRI_PLACES=162, PETRI_TRANSITIONS=234} [2024-05-12 12:51:03,065 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 99 predicate places. [2024-05-12 12:51:03,066 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 234 transitions, 2327 flow [2024-05-12 12:51:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:03,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:03,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:51:03,066 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:03,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2036896783, now seen corresponding path program 1 times [2024-05-12 12:51:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828408250] [2024-05-12 12:51:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828408250] [2024-05-12 12:51:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828408250] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:03,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:03,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252634662] [2024-05-12 12:51:03,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:03,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:03,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:03,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:03,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:51:03,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 234 transitions, 2327 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:03,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:03,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:51:03,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:04,956 INFO L124 PetriNetUnfolderBase]: 10926/15932 cut-off events. [2024-05-12 12:51:04,956 INFO L125 PetriNetUnfolderBase]: For 387478/388495 co-relation queries the response was YES. [2024-05-12 12:51:05,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93135 conditions, 15932 events. 10926/15932 cut-off events. For 387478/388495 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 102701 event pairs, 2877 based on Foata normal form. 125/15395 useless extension candidates. Maximal degree in co-relation 93059. Up to 14202 conditions per place. [2024-05-12 12:51:05,120 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 186 selfloop transitions, 61 changer transitions 0/280 dead transitions. [2024-05-12 12:51:05,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 280 transitions, 3147 flow [2024-05-12 12:51:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 218 transitions. [2024-05-12 12:51:05,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6374269005847953 [2024-05-12 12:51:05,121 INFO L175 Difference]: Start difference. First operand has 162 places, 234 transitions, 2327 flow. Second operand 6 states and 218 transitions. [2024-05-12 12:51:05,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 280 transitions, 3147 flow [2024-05-12 12:51:05,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 280 transitions, 3127 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-05-12 12:51:05,725 INFO L231 Difference]: Finished difference. Result has 168 places, 240 transitions, 2555 flow [2024-05-12 12:51:05,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2555, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2024-05-12 12:51:05,726 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 105 predicate places. [2024-05-12 12:51:05,726 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 2555 flow [2024-05-12 12:51:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:05,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:05,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:05,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:51:05,726 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:05,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1637062423, now seen corresponding path program 2 times [2024-05-12 12:51:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:05,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894843232] [2024-05-12 12:51:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:05,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:05,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:05,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894843232] [2024-05-12 12:51:05,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894843232] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:05,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:05,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699730563] [2024-05-12 12:51:05,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:05,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:51:05,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 2555 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:05,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:05,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:51:05,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:07,730 INFO L124 PetriNetUnfolderBase]: 11021/16063 cut-off events. [2024-05-12 12:51:07,731 INFO L125 PetriNetUnfolderBase]: For 425658/426889 co-relation queries the response was YES. [2024-05-12 12:51:07,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97006 conditions, 16063 events. 11021/16063 cut-off events. For 425658/426889 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 103709 event pairs, 3127 based on Foata normal form. 96/15495 useless extension candidates. Maximal degree in co-relation 96927. Up to 14519 conditions per place. [2024-05-12 12:51:07,905 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 187 selfloop transitions, 57 changer transitions 0/277 dead transitions. [2024-05-12 12:51:07,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 277 transitions, 3187 flow [2024-05-12 12:51:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 212 transitions. [2024-05-12 12:51:07,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6198830409356725 [2024-05-12 12:51:07,906 INFO L175 Difference]: Start difference. First operand has 168 places, 240 transitions, 2555 flow. Second operand 6 states and 212 transitions. [2024-05-12 12:51:07,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 277 transitions, 3187 flow [2024-05-12 12:51:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 277 transitions, 3045 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:08,581 INFO L231 Difference]: Finished difference. Result has 172 places, 243 transitions, 2604 flow [2024-05-12 12:51:08,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2604, PETRI_PLACES=172, PETRI_TRANSITIONS=243} [2024-05-12 12:51:08,581 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 109 predicate places. [2024-05-12 12:51:08,582 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 243 transitions, 2604 flow [2024-05-12 12:51:08,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:08,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:08,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:51:08,582 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash -363486607, now seen corresponding path program 3 times [2024-05-12 12:51:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452189361] [2024-05-12 12:51:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:08,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452189361] [2024-05-12 12:51:08,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452189361] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:08,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:08,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:08,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878439510] [2024-05-12 12:51:08,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:08,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:08,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-05-12 12:51:08,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 243 transitions, 2604 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:08,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:08,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-05-12 12:51:08,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:10,574 INFO L124 PetriNetUnfolderBase]: 11000/16038 cut-off events. [2024-05-12 12:51:10,574 INFO L125 PetriNetUnfolderBase]: For 438379/439530 co-relation queries the response was YES. [2024-05-12 12:51:10,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96730 conditions, 16038 events. 11000/16038 cut-off events. For 438379/439530 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 103419 event pairs, 2867 based on Foata normal form. 148/15526 useless extension candidates. Maximal degree in co-relation 96649. Up to 14424 conditions per place. [2024-05-12 12:51:10,747 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 188 selfloop transitions, 53 changer transitions 0/274 dead transitions. [2024-05-12 12:51:10,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 274 transitions, 3162 flow [2024-05-12 12:51:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:51:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:51:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-05-12 12:51:10,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2024-05-12 12:51:10,748 INFO L175 Difference]: Start difference. First operand has 172 places, 243 transitions, 2604 flow. Second operand 5 states and 185 transitions. [2024-05-12 12:51:10,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 274 transitions, 3162 flow [2024-05-12 12:51:11,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 3001 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:11,558 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2563 flow [2024-05-12 12:51:11,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2563, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-05-12 12:51:11,558 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 110 predicate places. [2024-05-12 12:51:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2563 flow [2024-05-12 12:51:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:11,559 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] [2024-05-12 12:51:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:51:11,559 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:11,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash 461205145, now seen corresponding path program 1 times [2024-05-12 12:51:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:11,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512451801] [2024-05-12 12:51:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512451801] [2024-05-12 12:51:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512451801] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261290589] [2024-05-12 12:51:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:11,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:11,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:11,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2563 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:11,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:11,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:11,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:13,894 INFO L124 PetriNetUnfolderBase]: 12803/18437 cut-off events. [2024-05-12 12:51:13,894 INFO L125 PetriNetUnfolderBase]: For 415876/415903 co-relation queries the response was YES. [2024-05-12 12:51:14,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101408 conditions, 18437 events. 12803/18437 cut-off events. For 415876/415903 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 116709 event pairs, 4512 based on Foata normal form. 28/18361 useless extension candidates. Maximal degree in co-relation 101326. Up to 16725 conditions per place. [2024-05-12 12:51:14,085 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 259 selfloop transitions, 39 changer transitions 0/312 dead transitions. [2024-05-12 12:51:14,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 312 transitions, 3553 flow [2024-05-12 12:51:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 246 transitions. [2024-05-12 12:51:14,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6165413533834586 [2024-05-12 12:51:14,086 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2563 flow. Second operand 7 states and 246 transitions. [2024-05-12 12:51:14,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 312 transitions, 3553 flow [2024-05-12 12:51:14,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 312 transitions, 3436 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:14,652 INFO L231 Difference]: Finished difference. Result has 178 places, 253 transitions, 2653 flow [2024-05-12 12:51:14,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2653, PETRI_PLACES=178, PETRI_TRANSITIONS=253} [2024-05-12 12:51:14,652 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 115 predicate places. [2024-05-12 12:51:14,652 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 253 transitions, 2653 flow [2024-05-12 12:51:14,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:14,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:14,652 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] [2024-05-12 12:51:14,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:51:14,652 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:14,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1484068569, now seen corresponding path program 2 times [2024-05-12 12:51:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:14,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638989506] [2024-05-12 12:51:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:14,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:14,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638989506] [2024-05-12 12:51:14,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638989506] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:14,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:14,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:14,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942054668] [2024-05-12 12:51:14,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:14,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:14,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:14,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 253 transitions, 2653 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:14,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:14,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:14,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:16,923 INFO L124 PetriNetUnfolderBase]: 12953/18475 cut-off events. [2024-05-12 12:51:16,923 INFO L125 PetriNetUnfolderBase]: For 440994/441021 co-relation queries the response was YES. [2024-05-12 12:51:17,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104298 conditions, 18475 events. 12953/18475 cut-off events. For 440994/441021 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 115398 event pairs, 3826 based on Foata normal form. 32/18482 useless extension candidates. Maximal degree in co-relation 104213. Up to 17224 conditions per place. [2024-05-12 12:51:17,171 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 257 selfloop transitions, 33 changer transitions 0/304 dead transitions. [2024-05-12 12:51:17,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 304 transitions, 3394 flow [2024-05-12 12:51:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 238 transitions. [2024-05-12 12:51:17,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-05-12 12:51:17,172 INFO L175 Difference]: Start difference. First operand has 178 places, 253 transitions, 2653 flow. Second operand 7 states and 238 transitions. [2024-05-12 12:51:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 304 transitions, 3394 flow [2024-05-12 12:51:17,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 304 transitions, 3344 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:17,955 INFO L231 Difference]: Finished difference. Result has 183 places, 255 transitions, 2703 flow [2024-05-12 12:51:17,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2605, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2703, PETRI_PLACES=183, PETRI_TRANSITIONS=255} [2024-05-12 12:51:17,956 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 120 predicate places. [2024-05-12 12:51:17,956 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 255 transitions, 2703 flow [2024-05-12 12:51:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:17,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:17,957 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] [2024-05-12 12:51:17,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:51:17,957 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:17,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1483742139, now seen corresponding path program 3 times [2024-05-12 12:51:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:17,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910380174] [2024-05-12 12:51:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910380174] [2024-05-12 12:51:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910380174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320295740] [2024-05-12 12:51:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:18,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:18,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:18,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:18,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 255 transitions, 2703 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:18,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:18,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:18,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:21,185 INFO L124 PetriNetUnfolderBase]: 13103/18681 cut-off events. [2024-05-12 12:51:21,185 INFO L125 PetriNetUnfolderBase]: For 460498/460525 co-relation queries the response was YES. [2024-05-12 12:51:21,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106185 conditions, 18681 events. 13103/18681 cut-off events. For 460498/460525 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 116658 event pairs, 3819 based on Foata normal form. 28/18684 useless extension candidates. Maximal degree in co-relation 106098. Up to 17305 conditions per place. [2024-05-12 12:51:21,480 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 261 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-05-12 12:51:21,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 312 transitions, 3509 flow [2024-05-12 12:51:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 241 transitions. [2024-05-12 12:51:21,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040100250626567 [2024-05-12 12:51:21,481 INFO L175 Difference]: Start difference. First operand has 183 places, 255 transitions, 2703 flow. Second operand 7 states and 241 transitions. [2024-05-12 12:51:21,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 312 transitions, 3509 flow [2024-05-12 12:51:22,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 312 transitions, 3443 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:22,359 INFO L231 Difference]: Finished difference. Result has 186 places, 260 transitions, 2793 flow [2024-05-12 12:51:22,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2637, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2793, PETRI_PLACES=186, PETRI_TRANSITIONS=260} [2024-05-12 12:51:22,360 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 123 predicate places. [2024-05-12 12:51:22,360 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 260 transitions, 2793 flow [2024-05-12 12:51:22,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:22,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:22,360 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] [2024-05-12 12:51:22,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:51:22,361 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:22,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1306582719, now seen corresponding path program 1 times [2024-05-12 12:51:22,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370524579] [2024-05-12 12:51:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370524579] [2024-05-12 12:51:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370524579] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:22,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:22,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2825282] [2024-05-12 12:51:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:22,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:51:22,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 260 transitions, 2793 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:22,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:22,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:51:22,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:24,959 INFO L124 PetriNetUnfolderBase]: 12255/17741 cut-off events. [2024-05-12 12:51:24,959 INFO L125 PetriNetUnfolderBase]: For 536474/537807 co-relation queries the response was YES. [2024-05-12 12:51:25,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107386 conditions, 17741 events. 12255/17741 cut-off events. For 536474/537807 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 114166 event pairs, 3299 based on Foata normal form. 227/17226 useless extension candidates. Maximal degree in co-relation 107297. Up to 15585 conditions per place. [2024-05-12 12:51:25,132 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 196 selfloop transitions, 93 changer transitions 0/325 dead transitions. [2024-05-12 12:51:25,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 325 transitions, 3977 flow [2024-05-12 12:51:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-05-12 12:51:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416040100250626 [2024-05-12 12:51:25,133 INFO L175 Difference]: Start difference. First operand has 186 places, 260 transitions, 2793 flow. Second operand 7 states and 256 transitions. [2024-05-12 12:51:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 325 transitions, 3977 flow [2024-05-12 12:51:26,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 325 transitions, 3929 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:26,226 INFO L231 Difference]: Finished difference. Result has 190 places, 272 transitions, 3140 flow [2024-05-12 12:51:26,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=190, PETRI_TRANSITIONS=272} [2024-05-12 12:51:26,227 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 127 predicate places. [2024-05-12 12:51:26,227 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 272 transitions, 3140 flow [2024-05-12 12:51:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:26,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:26,227 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] [2024-05-12 12:51:26,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:51:26,227 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1306702875, now seen corresponding path program 1 times [2024-05-12 12:51:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61972278] [2024-05-12 12:51:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61972278] [2024-05-12 12:51:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61972278] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:26,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:26,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110486616] [2024-05-12 12:51:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:26,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:26,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 272 transitions, 3140 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:26,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:26,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:29,118 INFO L124 PetriNetUnfolderBase]: 13271/19027 cut-off events. [2024-05-12 12:51:29,118 INFO L125 PetriNetUnfolderBase]: For 517611/517655 co-relation queries the response was YES. [2024-05-12 12:51:29,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112434 conditions, 19027 events. 13271/19027 cut-off events. For 517611/517655 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 120442 event pairs, 3850 based on Foata normal form. 30/19012 useless extension candidates. Maximal degree in co-relation 112343. Up to 17474 conditions per place. [2024-05-12 12:51:29,330 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 275 selfloop transitions, 63 changer transitions 0/352 dead transitions. [2024-05-12 12:51:29,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 352 transitions, 4542 flow [2024-05-12 12:51:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2024-05-12 12:51:29,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:51:29,332 INFO L175 Difference]: Start difference. First operand has 190 places, 272 transitions, 3140 flow. Second operand 7 states and 247 transitions. [2024-05-12 12:51:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 352 transitions, 4542 flow [2024-05-12 12:51:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 352 transitions, 4396 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:30,450 INFO L231 Difference]: Finished difference. Result has 198 places, 297 transitions, 3486 flow [2024-05-12 12:51:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3486, PETRI_PLACES=198, PETRI_TRANSITIONS=297} [2024-05-12 12:51:30,451 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 135 predicate places. [2024-05-12 12:51:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 297 transitions, 3486 flow [2024-05-12 12:51:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:30,451 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] [2024-05-12 12:51:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:51:30,452 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1306702689, now seen corresponding path program 2 times [2024-05-12 12:51:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315455530] [2024-05-12 12:51:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:30,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:30,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315455530] [2024-05-12 12:51:30,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315455530] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:30,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:30,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:30,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484231901] [2024-05-12 12:51:30,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:30,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:30,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:30,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:51:30,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 297 transitions, 3486 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:30,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:30,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:51:30,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:33,302 INFO L124 PetriNetUnfolderBase]: 12380/17926 cut-off events. [2024-05-12 12:51:33,302 INFO L125 PetriNetUnfolderBase]: For 617205/619383 co-relation queries the response was YES. [2024-05-12 12:51:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115807 conditions, 17926 events. 12380/17926 cut-off events. For 617205/619383 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 115394 event pairs, 3241 based on Foata normal form. 134/17402 useless extension candidates. Maximal degree in co-relation 115711. Up to 16033 conditions per place. [2024-05-12 12:51:33,677 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 227 selfloop transitions, 83 changer transitions 0/350 dead transitions. [2024-05-12 12:51:33,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 350 transitions, 4309 flow [2024-05-12 12:51:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 246 transitions. [2024-05-12 12:51:33,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6165413533834586 [2024-05-12 12:51:33,679 INFO L175 Difference]: Start difference. First operand has 198 places, 297 transitions, 3486 flow. Second operand 7 states and 246 transitions. [2024-05-12 12:51:33,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 350 transitions, 4309 flow [2024-05-12 12:51:34,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 350 transitions, 4227 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-05-12 12:51:34,877 INFO L231 Difference]: Finished difference. Result has 204 places, 305 transitions, 3681 flow [2024-05-12 12:51:34,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3681, PETRI_PLACES=204, PETRI_TRANSITIONS=305} [2024-05-12 12:51:34,878 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 141 predicate places. [2024-05-12 12:51:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 305 transitions, 3681 flow [2024-05-12 12:51:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:34,878 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] [2024-05-12 12:51:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:51:34,879 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1483834395, now seen corresponding path program 2 times [2024-05-12 12:51:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:34,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414994425] [2024-05-12 12:51:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:35,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414994425] [2024-05-12 12:51:35,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414994425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:35,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:35,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276625496] [2024-05-12 12:51:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:35,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:35,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:35,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:35,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 305 transitions, 3681 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:35,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:35,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:35,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:37,994 INFO L124 PetriNetUnfolderBase]: 13459/19764 cut-off events. [2024-05-12 12:51:37,995 INFO L125 PetriNetUnfolderBase]: For 581539/581587 co-relation queries the response was YES. [2024-05-12 12:51:38,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119394 conditions, 19764 events. 13459/19764 cut-off events. For 581539/581587 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 130144 event pairs, 5300 based on Foata normal form. 33/19635 useless extension candidates. Maximal degree in co-relation 119296. Up to 17668 conditions per place. [2024-05-12 12:51:38,237 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 286 selfloop transitions, 77 changer transitions 0/377 dead transitions. [2024-05-12 12:51:38,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 377 transitions, 5253 flow [2024-05-12 12:51:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2024-05-12 12:51:38,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:51:38,239 INFO L175 Difference]: Start difference. First operand has 204 places, 305 transitions, 3681 flow. Second operand 7 states and 247 transitions. [2024-05-12 12:51:38,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 377 transitions, 5253 flow [2024-05-12 12:51:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 377 transitions, 5037 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:39,782 INFO L231 Difference]: Finished difference. Result has 209 places, 323 transitions, 3903 flow [2024-05-12 12:51:39,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3903, PETRI_PLACES=209, PETRI_TRANSITIONS=323} [2024-05-12 12:51:39,783 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 146 predicate places. [2024-05-12 12:51:39,783 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 323 transitions, 3903 flow [2024-05-12 12:51:39,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:39,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:39,783 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] [2024-05-12 12:51:39,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:51:39,784 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:39,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1311344319, now seen corresponding path program 3 times [2024-05-12 12:51:39,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:39,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114272420] [2024-05-12 12:51:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:39,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114272420] [2024-05-12 12:51:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114272420] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:39,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:39,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205490344] [2024-05-12 12:51:39,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:39,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:39,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:40,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 57 [2024-05-12 12:51:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 323 transitions, 3903 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:40,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:40,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 57 [2024-05-12 12:51:40,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:42,845 INFO L124 PetriNetUnfolderBase]: 12610/18263 cut-off events. [2024-05-12 12:51:42,846 INFO L125 PetriNetUnfolderBase]: For 678435/680610 co-relation queries the response was YES. [2024-05-12 12:51:42,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120204 conditions, 18263 events. 12610/18263 cut-off events. For 678435/680610 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 117605 event pairs, 3241 based on Foata normal form. 177/17782 useless extension candidates. Maximal degree in co-relation 120103. Up to 16250 conditions per place. [2024-05-12 12:51:43,060 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 243 selfloop transitions, 107 changer transitions 0/393 dead transitions. [2024-05-12 12:51:43,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 393 transitions, 5149 flow [2024-05-12 12:51:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-05-12 12:51:43,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6030701754385965 [2024-05-12 12:51:43,061 INFO L175 Difference]: Start difference. First operand has 209 places, 323 transitions, 3903 flow. Second operand 8 states and 275 transitions. [2024-05-12 12:51:43,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 393 transitions, 5149 flow [2024-05-12 12:51:44,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 393 transitions, 5030 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:44,544 INFO L231 Difference]: Finished difference. Result has 217 places, 343 transitions, 4331 flow [2024-05-12 12:51:44,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3784, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4331, PETRI_PLACES=217, PETRI_TRANSITIONS=343} [2024-05-12 12:51:44,544 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 154 predicate places. [2024-05-12 12:51:44,544 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 343 transitions, 4331 flow [2024-05-12 12:51:44,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:44,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:44,545 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] [2024-05-12 12:51:44,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:51:44,545 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:44,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1484071545, now seen corresponding path program 3 times [2024-05-12 12:51:44,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:44,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787617116] [2024-05-12 12:51:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:44,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:44,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787617116] [2024-05-12 12:51:44,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787617116] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:44,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:44,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:44,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641120857] [2024-05-12 12:51:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:44,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:44,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:44,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-05-12 12:51:44,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 343 transitions, 4331 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:44,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:44,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-05-12 12:51:44,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:47,737 INFO L124 PetriNetUnfolderBase]: 13586/19952 cut-off events. [2024-05-12 12:51:47,737 INFO L125 PetriNetUnfolderBase]: For 634467/634518 co-relation queries the response was YES. [2024-05-12 12:51:47,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122448 conditions, 19952 events. 13586/19952 cut-off events. For 634467/634518 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 131639 event pairs, 5305 based on Foata normal form. 35/19824 useless extension candidates. Maximal degree in co-relation 122344. Up to 17832 conditions per place. [2024-05-12 12:51:47,956 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 302 selfloop transitions, 81 changer transitions 0/397 dead transitions. [2024-05-12 12:51:47,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 397 transitions, 5603 flow [2024-05-12 12:51:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 244 transitions. [2024-05-12 12:51:47,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115288220551378 [2024-05-12 12:51:47,958 INFO L175 Difference]: Start difference. First operand has 217 places, 343 transitions, 4331 flow. Second operand 7 states and 244 transitions. [2024-05-12 12:51:47,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 397 transitions, 5603 flow [2024-05-12 12:51:49,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 397 transitions, 5378 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:49,602 INFO L231 Difference]: Finished difference. Result has 222 places, 346 transitions, 4335 flow [2024-05-12 12:51:49,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4335, PETRI_PLACES=222, PETRI_TRANSITIONS=346} [2024-05-12 12:51:49,603 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 159 predicate places. [2024-05-12 12:51:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 346 transitions, 4335 flow [2024-05-12 12:51:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:49,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:49,603 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] [2024-05-12 12:51:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:51:49,604 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:49,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1820026737, now seen corresponding path program 4 times [2024-05-12 12:51:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:49,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033202853] [2024-05-12 12:51:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat