./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi002_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi002_tso.i ./goblint.2024-06-19_11-23-25.files/protection/rfi002_tso.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-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:49:07,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:49:07,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:49:07,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:49:07,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:49:07,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:49:07,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:49:07,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:49:07,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:49:07,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:49:07,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:49:07,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:49:07,970 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:49:07,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:49:07,971 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:49:07,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:49:07,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:49:07,972 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:49:07,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:49:07,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:49:07,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:49:07,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:49:07,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:49:07,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:49:07,974 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:49:07,974 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:49:07,974 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:49:07,974 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:49:07,975 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:49:07,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:49:07,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:49:07,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:49:07,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:07,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:49:07,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:49:07,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:49:07,977 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:49:07,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:49:07,977 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:49:07,978 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:49:07,978 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:49:07,978 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:49:07,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:49:07,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:49:08,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:49:08,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:49:08,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:49:08,209 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:49:08,209 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:49:08,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi002_tso.i [2024-06-27 17:49:09,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:49:09,472 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:49:09,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_tso.i [2024-06-27 17:49:09,485 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e55f2c53f/7df596f4b34145939e4454484adfad5c/FLAGcab8af95d [2024-06-27 17:49:09,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e55f2c53f/7df596f4b34145939e4454484adfad5c [2024-06-27 17:49:09,497 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:49:09,498 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:49:09,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi002_tso.yml/witness.yml [2024-06-27 17:49:09,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:49:09,613 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:49:09,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:09,614 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:49:09,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:49:09,618 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:09" (1/2) ... [2024-06-27 17:49:09,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ba4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:09, skipping insertion in model container [2024-06-27 17:49:09,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:49:09" (1/2) ... [2024-06-27 17:49:09,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f81802c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:49:09, skipping insertion in model container [2024-06-27 17:49:09,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:09" (2/2) ... [2024-06-27 17:49:09,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ba4d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:09, skipping insertion in model container [2024-06-27 17:49:09,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:09" (2/2) ... [2024-06-27 17:49:09,621 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:49:09,705 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:49:09,707 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] (((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 17:49:09,707 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0) [2024-06-27 17:49:09,707 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:49:09,707 INFO L106 edCorrectnessWitness]: ghost_update [L877-L877] multithreaded = 1; [2024-06-27 17:49:09,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:49:09,924 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_tso.i[987,1000] [2024-06-27 17:49:10,124 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:10,138 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:49:10,174 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_tso.i[987,1000] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:49:10,283 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:49:10,317 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:49:10,317 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10 WrapperNode [2024-06-27 17:49:10,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:49:10,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:10,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:49:10,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:49:10,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,378 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-06-27 17:49:10,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:49:10,379 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:49:10,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:49:10,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:49:10,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,391 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,411 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:49:10,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,444 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:49:10,450 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:49:10,450 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:49:10,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:49:10,451 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (1/1) ... [2024-06-27 17:49:10,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:49:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:49:10,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:49:10,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:49:10,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:49:10,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:49:10,524 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:49:10,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:49:10,525 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:49:10,525 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:49:10,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:49:10,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:49:10,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:49:10,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:49:10,527 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:49:10,656 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:49:10,658 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:49:11,041 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:49:11,041 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:49:11,287 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:49:11,288 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:49:11,289 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:11 BoogieIcfgContainer [2024-06-27 17:49:11,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:49:11,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:49:11,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:49:11,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:49:11,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:49:09" (1/4) ... [2024-06-27 17:49:11,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293ac734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:49:11, skipping insertion in model container [2024-06-27 17:49:11,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:49:09" (2/4) ... [2024-06-27 17:49:11,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293ac734 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:11, skipping insertion in model container [2024-06-27 17:49:11,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:49:10" (3/4) ... [2024-06-27 17:49:11,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293ac734 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:49:11, skipping insertion in model container [2024-06-27 17:49:11,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:49:11" (4/4) ... [2024-06-27 17:49:11,297 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_tso.i [2024-06-27 17:49:11,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:49:11,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:49:11,311 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:49:11,351 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:49:11,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 86 flow [2024-06-27 17:49:11,406 INFO L124 PetriNetUnfolderBase]: 1/37 cut-off events. [2024-06-27 17:49:11,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:11,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 37 events. 1/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-06-27 17:49:11,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 86 flow [2024-06-27 17:49:11,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 80 flow [2024-06-27 17:49:11,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:49:11,436 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;@4ebc0e2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:49:11,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:49:11,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:49:11,441 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:49:11,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:49:11,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:49:11,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:11,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash 516153351, now seen corresponding path program 1 times [2024-06-27 17:49:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:11,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313169197] [2024-06-27 17:49:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313169197] [2024-06-27 17:49:12,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313169197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:12,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:12,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256549837] [2024-06-27 17:49:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:12,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:12,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:12,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:49:12,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:12,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:12,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:49:12,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:13,003 INFO L124 PetriNetUnfolderBase]: 935/1530 cut-off events. [2024-06-27 17:49:13,003 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 17:49:13,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 1530 events. 935/1530 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7808 event pairs, 431 based on Foata normal form. 71/1480 useless extension candidates. Maximal degree in co-relation 3061. Up to 1512 conditions per place. [2024-06-27 17:49:13,012 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 36 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-06-27 17:49:13,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 185 flow [2024-06-27 17:49:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-27 17:49:13,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324786324786325 [2024-06-27 17:49:13,022 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 80 flow. Second operand 3 states and 74 transitions. [2024-06-27 17:49:13,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 185 flow [2024-06-27 17:49:13,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:13,026 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 104 flow [2024-06-27 17:49:13,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-27 17:49:13,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-06-27 17:49:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 104 flow [2024-06-27 17:49:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:13,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:13,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:49:13,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:13,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2102971374, now seen corresponding path program 1 times [2024-06-27 17:49:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588241993] [2024-06-27 17:49:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:13,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:13,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588241993] [2024-06-27 17:49:13,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588241993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:13,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:13,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:49:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730083722] [2024-06-27 17:49:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:13,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:49:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:49:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:49:13,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:49:14,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:14,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:14,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:49:14,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:14,354 INFO L124 PetriNetUnfolderBase]: 927/1704 cut-off events. [2024-06-27 17:49:14,355 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-06-27 17:49:14,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3518 conditions, 1704 events. 927/1704 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9778 event pairs, 459 based on Foata normal form. 4/1534 useless extension candidates. Maximal degree in co-relation 3506. Up to 1477 conditions per place. [2024-06-27 17:49:14,363 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 43 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-27 17:49:14,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 267 flow [2024-06-27 17:49:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:49:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:49:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 17:49:14,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 17:49:14,365 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-27 17:49:14,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 267 flow [2024-06-27 17:49:14,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:14,366 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 172 flow [2024-06-27 17:49:14,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-06-27 17:49:14,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-27 17:49:14,368 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 172 flow [2024-06-27 17:49:14,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:14,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:14,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:14,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:49:14,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:14,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash 742119663, now seen corresponding path program 1 times [2024-06-27 17:49:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:14,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704778745] [2024-06-27 17:49:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704778745] [2024-06-27 17:49:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704778745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:14,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:14,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:14,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632191736] [2024-06-27 17:49:14,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:14,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 17:49:14,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:14,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:14,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 17:49:14,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:14,592 INFO L124 PetriNetUnfolderBase]: 509/1018 cut-off events. [2024-06-27 17:49:14,592 INFO L125 PetriNetUnfolderBase]: For 241/255 co-relation queries the response was YES. [2024-06-27 17:49:14,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 1018 events. 509/1018 cut-off events. For 241/255 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5831 event pairs, 116 based on Foata normal form. 7/941 useless extension candidates. Maximal degree in co-relation 2144. Up to 780 conditions per place. [2024-06-27 17:49:14,598 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 33 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-27 17:49:14,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 246 flow [2024-06-27 17:49:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-27 17:49:14,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:49:14,600 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 172 flow. Second operand 3 states and 78 transitions. [2024-06-27 17:49:14,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 246 flow [2024-06-27 17:49:14,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 244 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:49:14,602 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 154 flow [2024-06-27 17:49:14,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-06-27 17:49:14,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-27 17:49:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 154 flow [2024-06-27 17:49:14,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:14,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:14,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:14,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:49:14,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:14,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1947288085, now seen corresponding path program 1 times [2024-06-27 17:49:14,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:14,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744864505] [2024-06-27 17:49:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:14,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744864505] [2024-06-27 17:49:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744864505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:49:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24313396] [2024-06-27 17:49:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:49:16,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:49:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:49:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:49:16,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:49:16,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,714 INFO L124 PetriNetUnfolderBase]: 827/1544 cut-off events. [2024-06-27 17:49:16,714 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2024-06-27 17:49:16,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 1544 events. 827/1544 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8491 event pairs, 383 based on Foata normal form. 4/1428 useless extension candidates. Maximal degree in co-relation 3418. Up to 1264 conditions per place. [2024-06-27 17:49:16,721 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 55 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 17:49:16,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 370 flow [2024-06-27 17:49:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 17:49:16,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-27 17:49:16,722 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 154 flow. Second operand 5 states and 114 transitions. [2024-06-27 17:49:16,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 370 flow [2024-06-27 17:49:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:16,724 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 204 flow [2024-06-27 17:49:16,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 17:49:16,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 17:49:16,725 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 204 flow [2024-06-27 17:49:16,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:49:16,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err1ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:16,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1530873630, now seen corresponding path program 1 times [2024-06-27 17:49:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716702230] [2024-06-27 17:49:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716702230] [2024-06-27 17:49:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716702230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:16,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:49:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152584960] [2024-06-27 17:49:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:49:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:49:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:49:16,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 17:49:16,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:16,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 17:49:16,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:16,913 INFO L124 PetriNetUnfolderBase]: 484/973 cut-off events. [2024-06-27 17:49:16,914 INFO L125 PetriNetUnfolderBase]: For 542/557 co-relation queries the response was YES. [2024-06-27 17:49:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 973 events. 484/973 cut-off events. For 542/557 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5540 event pairs, 102 based on Foata normal form. 8/957 useless extension candidates. Maximal degree in co-relation 2244. Up to 628 conditions per place. [2024-06-27 17:49:16,919 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 38 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-06-27 17:49:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 308 flow [2024-06-27 17:49:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:49:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:49:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-27 17:49:16,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581196581196581 [2024-06-27 17:49:16,920 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 204 flow. Second operand 3 states and 77 transitions. [2024-06-27 17:49:16,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 308 flow [2024-06-27 17:49:16,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 297 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:49:16,922 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 195 flow [2024-06-27 17:49:16,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=195, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 17:49:16,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 17:49:16,923 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 195 flow [2024-06-27 17:49:16,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:16,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:16,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:16,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:49:16,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash 212441485, now seen corresponding path program 1 times [2024-06-27 17:49:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896786760] [2024-06-27 17:49:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:17,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:17,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896786760] [2024-06-27 17:49:17,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896786760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:17,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:17,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:49:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418611646] [2024-06-27 17:49:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:49:17,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:49:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:49:17,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:17,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:17,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:17,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:17,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:18,085 INFO L124 PetriNetUnfolderBase]: 832/1512 cut-off events. [2024-06-27 17:49:18,086 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-06-27 17:49:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 1512 events. 832/1512 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7953 event pairs, 433 based on Foata normal form. 1/1462 useless extension candidates. Maximal degree in co-relation 3693. Up to 1340 conditions per place. [2024-06-27 17:49:18,092 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 49 selfloop transitions, 7 changer transitions 2/64 dead transitions. [2024-06-27 17:49:18,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 369 flow [2024-06-27 17:49:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:49:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:49:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 17:49:18,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-27 17:49:18,094 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 195 flow. Second operand 5 states and 87 transitions. [2024-06-27 17:49:18,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 369 flow [2024-06-27 17:49:18,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:18,099 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 248 flow [2024-06-27 17:49:18,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 17:49:18,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 17:49:18,101 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 248 flow [2024-06-27 17:49:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:18,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:18,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:18,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:49:18,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:18,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1293201708, now seen corresponding path program 1 times [2024-06-27 17:49:18,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:18,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903147065] [2024-06-27 17:49:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:18,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903147065] [2024-06-27 17:49:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903147065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:20,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:20,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:20,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070140667] [2024-06-27 17:49:20,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:20,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:20,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:20,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:20,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:20,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 17:49:20,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:20,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:20,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 17:49:20,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:20,903 INFO L124 PetriNetUnfolderBase]: 632/1211 cut-off events. [2024-06-27 17:49:20,904 INFO L125 PetriNetUnfolderBase]: For 1119/1119 co-relation queries the response was YES. [2024-06-27 17:49:20,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 1211 events. 632/1211 cut-off events. For 1119/1119 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6439 event pairs, 214 based on Foata normal form. 4/1159 useless extension candidates. Maximal degree in co-relation 3114. Up to 930 conditions per place. [2024-06-27 17:49:20,909 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 56 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-27 17:49:20,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 454 flow [2024-06-27 17:49:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-27 17:49:20,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-27 17:49:20,911 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 248 flow. Second operand 6 states and 124 transitions. [2024-06-27 17:49:20,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 454 flow [2024-06-27 17:49:20,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 445 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:20,913 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 263 flow [2024-06-27 17:49:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-06-27 17:49:20,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 17:49:20,914 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 263 flow [2024-06-27 17:49:20,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:20,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:20,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:49:20,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2039361620, now seen corresponding path program 1 times [2024-06-27 17:49:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360166970] [2024-06-27 17:49:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360166970] [2024-06-27 17:49:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360166970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:21,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:21,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024989212] [2024-06-27 17:49:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:21,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:21,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:21,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:21,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:21,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:21,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:22,336 INFO L124 PetriNetUnfolderBase]: 732/1353 cut-off events. [2024-06-27 17:49:22,337 INFO L125 PetriNetUnfolderBase]: For 1630/1630 co-relation queries the response was YES. [2024-06-27 17:49:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3631 conditions, 1353 events. 732/1353 cut-off events. For 1630/1630 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7085 event pairs, 357 based on Foata normal form. 1/1303 useless extension candidates. Maximal degree in co-relation 3606. Up to 1175 conditions per place. [2024-06-27 17:49:22,343 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 53 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-27 17:49:22,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 445 flow [2024-06-27 17:49:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 17:49:22,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-06-27 17:49:22,346 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 263 flow. Second operand 6 states and 98 transitions. [2024-06-27 17:49:22,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 445 flow [2024-06-27 17:49:22,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 405 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:22,353 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 282 flow [2024-06-27 17:49:22,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-06-27 17:49:22,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 17:49:22,355 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 282 flow [2024-06-27 17:49:22,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:22,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:22,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:22,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:49:22,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:22,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash -341532866, now seen corresponding path program 1 times [2024-06-27 17:49:22,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:22,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341033945] [2024-06-27 17:49:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:23,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341033945] [2024-06-27 17:49:23,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341033945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:23,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:23,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:23,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88823204] [2024-06-27 17:49:23,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:23,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:23,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:23,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:23,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 282 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:23,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:23,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:23,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:23,821 INFO L124 PetriNetUnfolderBase]: 754/1391 cut-off events. [2024-06-27 17:49:23,821 INFO L125 PetriNetUnfolderBase]: For 2001/2007 co-relation queries the response was YES. [2024-06-27 17:49:23,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3841 conditions, 1391 events. 754/1391 cut-off events. For 2001/2007 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7343 event pairs, 264 based on Foata normal form. 6/1344 useless extension candidates. Maximal degree in co-relation 3814. Up to 1175 conditions per place. [2024-06-27 17:49:23,827 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 57 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-27 17:49:23,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 514 flow [2024-06-27 17:49:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 17:49:23,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 17:49:23,829 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 282 flow. Second operand 6 states and 105 transitions. [2024-06-27 17:49:23,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 514 flow [2024-06-27 17:49:23,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 495 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:23,832 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 353 flow [2024-06-27 17:49:23,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-27 17:49:23,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-27 17:49:23,833 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 353 flow [2024-06-27 17:49:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:23,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:23,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:49:23,834 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:23,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1204290216, now seen corresponding path program 2 times [2024-06-27 17:49:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:23,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737806275] [2024-06-27 17:49:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:23,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:24,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:24,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737806275] [2024-06-27 17:49:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737806275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:24,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:24,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:49:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183811964] [2024-06-27 17:49:24,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:49:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:49:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:49:24,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:24,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:24,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:24,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:24,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:25,275 INFO L124 PetriNetUnfolderBase]: 764/1429 cut-off events. [2024-06-27 17:49:25,275 INFO L125 PetriNetUnfolderBase]: For 2903/2909 co-relation queries the response was YES. [2024-06-27 17:49:25,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1429 events. 764/1429 cut-off events. For 2903/2909 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7654 event pairs, 266 based on Foata normal form. 6/1374 useless extension candidates. Maximal degree in co-relation 4272. Up to 1150 conditions per place. [2024-06-27 17:49:25,283 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 59 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-27 17:49:25,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 657 flow [2024-06-27 17:49:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 17:49:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 17:49:25,284 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 353 flow. Second operand 6 states and 105 transitions. [2024-06-27 17:49:25,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 657 flow [2024-06-27 17:49:25,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 632 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:25,288 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 471 flow [2024-06-27 17:49:25,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=471, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-27 17:49:25,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 17:49:25,290 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 471 flow [2024-06-27 17:49:25,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:25,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:25,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:25,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:49:25,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:25,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1204301128, now seen corresponding path program 1 times [2024-06-27 17:49:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:25,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068026218] [2024-06-27 17:49:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:26,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068026218] [2024-06-27 17:49:26,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068026218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:26,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:26,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882662545] [2024-06-27 17:49:26,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:26,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:26,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 471 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:26,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:26,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:26,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:27,193 INFO L124 PetriNetUnfolderBase]: 767/1424 cut-off events. [2024-06-27 17:49:27,193 INFO L125 PetriNetUnfolderBase]: For 3806/3806 co-relation queries the response was YES. [2024-06-27 17:49:27,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4631 conditions, 1424 events. 767/1424 cut-off events. For 3806/3806 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7515 event pairs, 291 based on Foata normal form. 1/1368 useless extension candidates. Maximal degree in co-relation 4599. Up to 1215 conditions per place. [2024-06-27 17:49:27,207 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 75 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-06-27 17:49:27,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 725 flow [2024-06-27 17:49:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 17:49:27,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-06-27 17:49:27,209 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 471 flow. Second operand 7 states and 114 transitions. [2024-06-27 17:49:27,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 725 flow [2024-06-27 17:49:27,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 93 transitions, 681 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:27,214 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 476 flow [2024-06-27 17:49:27,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-27 17:49:27,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-27 17:49:27,215 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 476 flow [2024-06-27 17:49:27,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:27,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:27,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:49:27,216 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:27,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1997733316, now seen corresponding path program 1 times [2024-06-27 17:49:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618653026] [2024-06-27 17:49:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618653026] [2024-06-27 17:49:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618653026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:28,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958970230] [2024-06-27 17:49:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:28,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:28,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:28,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:28,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:28,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:28,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:29,020 INFO L124 PetriNetUnfolderBase]: 769/1430 cut-off events. [2024-06-27 17:49:29,020 INFO L125 PetriNetUnfolderBase]: For 4118/4118 co-relation queries the response was YES. [2024-06-27 17:49:29,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 1430 events. 769/1430 cut-off events. For 4118/4118 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7567 event pairs, 291 based on Foata normal form. 1/1373 useless extension candidates. Maximal degree in co-relation 4681. Up to 1189 conditions per place. [2024-06-27 17:49:29,031 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 68 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-27 17:49:29,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 766 flow [2024-06-27 17:49:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:49:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:49:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 17:49:29,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-27 17:49:29,033 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 476 flow. Second operand 6 states and 106 transitions. [2024-06-27 17:49:29,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 766 flow [2024-06-27 17:49:29,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 729 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:29,041 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 570 flow [2024-06-27 17:49:29,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-27 17:49:29,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-27 17:49:29,042 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 570 flow [2024-06-27 17:49:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:29,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:29,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:49:29,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:29,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:29,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1997582377, now seen corresponding path program 1 times [2024-06-27 17:49:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:29,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734233931] [2024-06-27 17:49:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:29,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:30,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734233931] [2024-06-27 17:49:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734233931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:30,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:30,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505417862] [2024-06-27 17:49:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:30,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:30,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:30,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:30,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:30,602 INFO L124 PetriNetUnfolderBase]: 789/1468 cut-off events. [2024-06-27 17:49:30,603 INFO L125 PetriNetUnfolderBase]: For 5048/5054 co-relation queries the response was YES. [2024-06-27 17:49:30,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4979 conditions, 1468 events. 789/1468 cut-off events. For 5048/5054 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7802 event pairs, 293 based on Foata normal form. 6/1413 useless extension candidates. Maximal degree in co-relation 4944. Up to 1217 conditions per place. [2024-06-27 17:49:30,612 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 87 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-27 17:49:30,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 933 flow [2024-06-27 17:49:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 17:49:30,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 17:49:30,614 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 570 flow. Second operand 7 states and 117 transitions. [2024-06-27 17:49:30,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 933 flow [2024-06-27 17:49:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 906 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:30,622 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 716 flow [2024-06-27 17:49:30,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2024-06-27 17:49:30,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-27 17:49:30,623 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 716 flow [2024-06-27 17:49:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:30,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:30,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:30,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:49:30,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:30,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:30,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1321380661, now seen corresponding path program 2 times [2024-06-27 17:49:30,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:30,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003165999] [2024-06-27 17:49:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:30,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:31,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:31,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003165999] [2024-06-27 17:49:31,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003165999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:31,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:31,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:31,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940037555] [2024-06-27 17:49:31,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:31,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:31,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:31,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:31,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:31,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:31,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:31,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:32,318 INFO L124 PetriNetUnfolderBase]: 813/1506 cut-off events. [2024-06-27 17:49:32,318 INFO L125 PetriNetUnfolderBase]: For 6750/6759 co-relation queries the response was YES. [2024-06-27 17:49:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 1506 events. 813/1506 cut-off events. For 6750/6759 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8055 event pairs, 274 based on Foata normal form. 8/1452 useless extension candidates. Maximal degree in co-relation 5437. Up to 1171 conditions per place. [2024-06-27 17:49:32,326 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 87 selfloop transitions, 30 changer transitions 0/123 dead transitions. [2024-06-27 17:49:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 1144 flow [2024-06-27 17:49:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 17:49:32,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-27 17:49:32,328 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 716 flow. Second operand 7 states and 120 transitions. [2024-06-27 17:49:32,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 1144 flow [2024-06-27 17:49:32,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 1108 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:32,337 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 893 flow [2024-06-27 17:49:32,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=893, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2024-06-27 17:49:32,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 17:49:32,338 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 893 flow [2024-06-27 17:49:32,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:32,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:32,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:32,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:49:32,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:32,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1321707091, now seen corresponding path program 3 times [2024-06-27 17:49:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:32,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320445676] [2024-06-27 17:49:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:32,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:33,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320445676] [2024-06-27 17:49:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320445676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:33,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615617689] [2024-06-27 17:49:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:33,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:33,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 893 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:33,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:33,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:33,994 INFO L124 PetriNetUnfolderBase]: 821/1518 cut-off events. [2024-06-27 17:49:33,994 INFO L125 PetriNetUnfolderBase]: For 8433/8442 co-relation queries the response was YES. [2024-06-27 17:49:33,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5952 conditions, 1518 events. 821/1518 cut-off events. For 8433/8442 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8097 event pairs, 296 based on Foata normal form. 8/1464 useless extension candidates. Maximal degree in co-relation 5908. Up to 1237 conditions per place. [2024-06-27 17:49:34,002 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 95 selfloop transitions, 24 changer transitions 0/125 dead transitions. [2024-06-27 17:49:34,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 125 transitions, 1239 flow [2024-06-27 17:49:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 17:49:34,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 17:49:34,004 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 893 flow. Second operand 7 states and 117 transitions. [2024-06-27 17:49:34,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 125 transitions, 1239 flow [2024-06-27 17:49:34,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 125 transitions, 1189 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:34,014 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 953 flow [2024-06-27 17:49:34,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-27 17:49:34,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 17:49:34,016 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 953 flow [2024-06-27 17:49:34,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:34,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:34,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:49:34,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:34,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1321368757, now seen corresponding path program 1 times [2024-06-27 17:49:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:34,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100030444] [2024-06-27 17:49:34,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:34,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:35,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:35,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100030444] [2024-06-27 17:49:35,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100030444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:35,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:35,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833593679] [2024-06-27 17:49:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:35,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:35,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 953 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:35,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:35,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:36,505 INFO L124 PetriNetUnfolderBase]: 824/1519 cut-off events. [2024-06-27 17:49:36,506 INFO L125 PetriNetUnfolderBase]: For 8438/8438 co-relation queries the response was YES. [2024-06-27 17:49:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6037 conditions, 1519 events. 824/1519 cut-off events. For 8438/8438 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8124 event pairs, 284 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 5991. Up to 1289 conditions per place. [2024-06-27 17:49:36,513 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 112 selfloop transitions, 17 changer transitions 0/135 dead transitions. [2024-06-27 17:49:36,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 135 transitions, 1342 flow [2024-06-27 17:49:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 17:49:36,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 17:49:36,515 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 953 flow. Second operand 8 states and 130 transitions. [2024-06-27 17:49:36,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 135 transitions, 1342 flow [2024-06-27 17:49:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 135 transitions, 1282 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:36,526 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 963 flow [2024-06-27 17:49:36,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2024-06-27 17:49:36,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 17:49:36,527 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 963 flow [2024-06-27 17:49:36,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:36,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:36,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:49:36,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:36,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1800309923, now seen corresponding path program 1 times [2024-06-27 17:49:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912009414] [2024-06-27 17:49:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:37,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:37,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912009414] [2024-06-27 17:49:37,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912009414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:37,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:37,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:49:37,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685529386] [2024-06-27 17:49:37,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:37,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:49:37,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:37,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:49:37,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:49:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:38,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 963 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:38,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:38,721 INFO L124 PetriNetUnfolderBase]: 866/1588 cut-off events. [2024-06-27 17:49:38,721 INFO L125 PetriNetUnfolderBase]: For 9393/9393 co-relation queries the response was YES. [2024-06-27 17:49:38,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6424 conditions, 1588 events. 866/1588 cut-off events. For 9393/9393 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8443 event pairs, 219 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 6377. Up to 1268 conditions per place. [2024-06-27 17:49:38,730 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 114 selfloop transitions, 30 changer transitions 0/150 dead transitions. [2024-06-27 17:49:38,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 150 transitions, 1421 flow [2024-06-27 17:49:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 17:49:38,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985347985347987 [2024-06-27 17:49:38,732 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 963 flow. Second operand 7 states and 131 transitions. [2024-06-27 17:49:38,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 150 transitions, 1421 flow [2024-06-27 17:49:38,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1373 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:38,745 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1074 flow [2024-06-27 17:49:38,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-27 17:49:38,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-27 17:49:38,745 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1074 flow [2024-06-27 17:49:38,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:38,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:38,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:49:38,746 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:38,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1800189023, now seen corresponding path program 2 times [2024-06-27 17:49:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756123854] [2024-06-27 17:49:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756123854] [2024-06-27 17:49:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756123854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:40,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:40,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657181473] [2024-06-27 17:49:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:40,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:40,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:40,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:40,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1074 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:40,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:40,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:41,046 INFO L124 PetriNetUnfolderBase]: 898/1644 cut-off events. [2024-06-27 17:49:41,046 INFO L125 PetriNetUnfolderBase]: For 11118/11118 co-relation queries the response was YES. [2024-06-27 17:49:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6995 conditions, 1644 events. 898/1644 cut-off events. For 11118/11118 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8810 event pairs, 217 based on Foata normal form. 2/1583 useless extension candidates. Maximal degree in co-relation 6945. Up to 1249 conditions per place. [2024-06-27 17:49:41,056 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 110 selfloop transitions, 39 changer transitions 0/155 dead transitions. [2024-06-27 17:49:41,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1554 flow [2024-06-27 17:49:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 17:49:41,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-27 17:49:41,057 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1074 flow. Second operand 7 states and 132 transitions. [2024-06-27 17:49:41,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1554 flow [2024-06-27 17:49:41,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1510 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:41,072 INFO L231 Difference]: Finished difference. Result has 109 places, 121 transitions, 1181 flow [2024-06-27 17:49:41,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1181, PETRI_PLACES=109, PETRI_TRANSITIONS=121} [2024-06-27 17:49:41,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 17:49:41,073 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 121 transitions, 1181 flow [2024-06-27 17:49:41,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:41,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:41,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:41,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:49:41,074 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:41,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1800188775, now seen corresponding path program 1 times [2024-06-27 17:49:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:41,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691945957] [2024-06-27 17:49:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:42,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691945957] [2024-06-27 17:49:42,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691945957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:42,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:42,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:42,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746799403] [2024-06-27 17:49:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:42,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:42,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:42,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:42,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 121 transitions, 1181 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:42,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:42,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:42,811 INFO L124 PetriNetUnfolderBase]: 896/1641 cut-off events. [2024-06-27 17:49:42,812 INFO L125 PetriNetUnfolderBase]: For 12713/12713 co-relation queries the response was YES. [2024-06-27 17:49:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7260 conditions, 1641 events. 896/1641 cut-off events. For 12713/12713 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8906 event pairs, 290 based on Foata normal form. 1/1579 useless extension candidates. Maximal degree in co-relation 7207. Up to 1368 conditions per place. [2024-06-27 17:49:42,820 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 115 selfloop transitions, 22 changer transitions 0/143 dead transitions. [2024-06-27 17:49:42,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 143 transitions, 1530 flow [2024-06-27 17:49:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 17:49:42,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 17:49:42,845 INFO L175 Difference]: Start difference. First operand has 109 places, 121 transitions, 1181 flow. Second operand 7 states and 117 transitions. [2024-06-27 17:49:42,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 143 transitions, 1530 flow [2024-06-27 17:49:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 1473 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 17:49:42,861 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1191 flow [2024-06-27 17:49:42,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-27 17:49:42,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-27 17:49:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1191 flow [2024-06-27 17:49:42,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:42,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:42,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:42,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:49:42,862 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:42,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1720254537, now seen corresponding path program 1 times [2024-06-27 17:49:42,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:42,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561132124] [2024-06-27 17:49:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:42,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561132124] [2024-06-27 17:49:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561132124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:44,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:44,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046573399] [2024-06-27 17:49:44,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:44,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:44,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:44,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:44,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:44,826 INFO L124 PetriNetUnfolderBase]: 916/1673 cut-off events. [2024-06-27 17:49:44,827 INFO L125 PetriNetUnfolderBase]: For 13703/13712 co-relation queries the response was YES. [2024-06-27 17:49:44,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7470 conditions, 1673 events. 916/1673 cut-off events. For 13703/13712 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9060 event pairs, 293 based on Foata normal form. 8/1617 useless extension candidates. Maximal degree in co-relation 7415. Up to 1390 conditions per place. [2024-06-27 17:49:44,836 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 125 selfloop transitions, 20 changer transitions 0/151 dead transitions. [2024-06-27 17:49:44,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 151 transitions, 1605 flow [2024-06-27 17:49:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 17:49:44,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-27 17:49:44,852 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1191 flow. Second operand 8 states and 133 transitions. [2024-06-27 17:49:44,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 151 transitions, 1605 flow [2024-06-27 17:49:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1561 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:44,872 INFO L231 Difference]: Finished difference. Result has 117 places, 125 transitions, 1233 flow [2024-06-27 17:49:44,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1233, PETRI_PLACES=117, PETRI_TRANSITIONS=125} [2024-06-27 17:49:44,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-27 17:49:44,873 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 125 transitions, 1233 flow [2024-06-27 17:49:44,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:44,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:44,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:49:44,873 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:44,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1976755047, now seen corresponding path program 2 times [2024-06-27 17:49:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771377675] [2024-06-27 17:49:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771377675] [2024-06-27 17:49:46,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771377675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:46,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:46,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:46,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385941307] [2024-06-27 17:49:46,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:46,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:46,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 125 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:46,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:46,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:47,006 INFO L124 PetriNetUnfolderBase]: 936/1705 cut-off events. [2024-06-27 17:49:47,006 INFO L125 PetriNetUnfolderBase]: For 15692/15701 co-relation queries the response was YES. [2024-06-27 17:49:47,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7837 conditions, 1705 events. 936/1705 cut-off events. For 15692/15701 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9263 event pairs, 296 based on Foata normal form. 8/1648 useless extension candidates. Maximal degree in co-relation 7781. Up to 1392 conditions per place. [2024-06-27 17:49:47,016 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 119 selfloop transitions, 27 changer transitions 0/152 dead transitions. [2024-06-27 17:49:47,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 152 transitions, 1651 flow [2024-06-27 17:49:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 17:49:47,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-27 17:49:47,018 INFO L175 Difference]: Start difference. First operand has 117 places, 125 transitions, 1233 flow. Second operand 8 states and 133 transitions. [2024-06-27 17:49:47,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 152 transitions, 1651 flow [2024-06-27 17:49:47,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 152 transitions, 1593 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 17:49:47,039 INFO L231 Difference]: Finished difference. Result has 120 places, 128 transitions, 1281 flow [2024-06-27 17:49:47,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=120, PETRI_TRANSITIONS=128} [2024-06-27 17:49:47,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 17:49:47,039 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 128 transitions, 1281 flow [2024-06-27 17:49:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:47,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:49:47,040 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:47,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1976746119, now seen corresponding path program 3 times [2024-06-27 17:49:47,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:47,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668346771] [2024-06-27 17:49:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:48,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668346771] [2024-06-27 17:49:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668346771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:48,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:48,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:48,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102357972] [2024-06-27 17:49:48,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:48,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:48,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:48,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:48,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 128 transitions, 1281 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:48,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:48,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:48,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:49,023 INFO L124 PetriNetUnfolderBase]: 948/1739 cut-off events. [2024-06-27 17:49:49,023 INFO L125 PetriNetUnfolderBase]: For 17001/17010 co-relation queries the response was YES. [2024-06-27 17:49:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8125 conditions, 1739 events. 948/1739 cut-off events. For 17001/17010 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9514 event pairs, 246 based on Foata normal form. 4/1674 useless extension candidates. Maximal degree in co-relation 8068. Up to 1227 conditions per place. [2024-06-27 17:49:49,033 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 116 selfloop transitions, 44 changer transitions 0/166 dead transitions. [2024-06-27 17:49:49,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1851 flow [2024-06-27 17:49:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:49:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:49:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 17:49:49,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2024-06-27 17:49:49,057 INFO L175 Difference]: Start difference. First operand has 120 places, 128 transitions, 1281 flow. Second operand 7 states and 128 transitions. [2024-06-27 17:49:49,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1851 flow [2024-06-27 17:49:49,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 166 transitions, 1769 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:49,081 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1431 flow [2024-06-27 17:49:49,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1431, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2024-06-27 17:49:49,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 17:49:49,082 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1431 flow [2024-06-27 17:49:49,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:49,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:49,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:49,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:49:49,083 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:49,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1986874377, now seen corresponding path program 3 times [2024-06-27 17:49:49,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:49,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715420025] [2024-06-27 17:49:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:49,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:50,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:50,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715420025] [2024-06-27 17:49:50,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715420025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:50,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:50,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:50,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172026381] [2024-06-27 17:49:50,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:50,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:50,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:50,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:50,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:50,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:50,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1431 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:50,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:50,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:50,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:51,303 INFO L124 PetriNetUnfolderBase]: 968/1764 cut-off events. [2024-06-27 17:49:51,304 INFO L125 PetriNetUnfolderBase]: For 19381/19390 co-relation queries the response was YES. [2024-06-27 17:49:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8651 conditions, 1764 events. 968/1764 cut-off events. For 19381/19390 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9715 event pairs, 281 based on Foata normal form. 8/1704 useless extension candidates. Maximal degree in co-relation 8591. Up to 1387 conditions per place. [2024-06-27 17:49:51,314 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 119 selfloop transitions, 38 changer transitions 0/163 dead transitions. [2024-06-27 17:49:51,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 163 transitions, 1895 flow [2024-06-27 17:49:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 17:49:51,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-27 17:49:51,316 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1431 flow. Second operand 8 states and 135 transitions. [2024-06-27 17:49:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 163 transitions, 1895 flow [2024-06-27 17:49:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 163 transitions, 1832 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 17:49:51,339 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 1504 flow [2024-06-27 17:49:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1504, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2024-06-27 17:49:51,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 17:49:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 1504 flow [2024-06-27 17:49:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:49:51,340 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:51,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1987230567, now seen corresponding path program 4 times [2024-06-27 17:49:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681951578] [2024-06-27 17:49:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681951578] [2024-06-27 17:49:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681951578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:52,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193426739] [2024-06-27 17:49:52,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:52,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:52,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:52,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:52,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 1504 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:52,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:52,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:52,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:53,327 INFO L124 PetriNetUnfolderBase]: 980/1782 cut-off events. [2024-06-27 17:49:53,327 INFO L125 PetriNetUnfolderBase]: For 20719/20728 co-relation queries the response was YES. [2024-06-27 17:49:53,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9004 conditions, 1782 events. 980/1782 cut-off events. For 20719/20728 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9811 event pairs, 277 based on Foata normal form. 8/1722 useless extension candidates. Maximal degree in co-relation 8942. Up to 1322 conditions per place. [2024-06-27 17:49:53,338 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 115 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-27 17:49:53,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 172 transitions, 2100 flow [2024-06-27 17:49:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 17:49:53,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-27 17:49:53,349 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 1504 flow. Second operand 8 states and 137 transitions. [2024-06-27 17:49:53,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 172 transitions, 2100 flow [2024-06-27 17:49:53,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 172 transitions, 1988 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 17:49:53,374 INFO L231 Difference]: Finished difference. Result has 132 places, 146 transitions, 1647 flow [2024-06-27 17:49:53,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1647, PETRI_PLACES=132, PETRI_TRANSITIONS=146} [2024-06-27 17:49:53,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 17:49:53,375 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 146 transitions, 1647 flow [2024-06-27 17:49:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:53,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:53,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:49:53,376 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:53,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1987243463, now seen corresponding path program 1 times [2024-06-27 17:49:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:53,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529219580] [2024-06-27 17:49:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:55,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:55,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529219580] [2024-06-27 17:49:55,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529219580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:55,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:55,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:49:55,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771564854] [2024-06-27 17:49:55,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:49:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:49:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:49:55,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:55,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 146 transitions, 1647 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:55,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:55,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:55,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:56,477 INFO L124 PetriNetUnfolderBase]: 983/1783 cut-off events. [2024-06-27 17:49:56,477 INFO L125 PetriNetUnfolderBase]: For 21384/21384 co-relation queries the response was YES. [2024-06-27 17:49:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9269 conditions, 1783 events. 983/1783 cut-off events. For 21384/21384 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9805 event pairs, 302 based on Foata normal form. 1/1718 useless extension candidates. Maximal degree in co-relation 9205. Up to 1523 conditions per place. [2024-06-27 17:49:56,487 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 151 selfloop transitions, 22 changer transitions 0/179 dead transitions. [2024-06-27 17:49:56,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 2170 flow [2024-06-27 17:49:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:49:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:49:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 17:49:56,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41595441595441596 [2024-06-27 17:49:56,489 INFO L175 Difference]: Start difference. First operand has 132 places, 146 transitions, 1647 flow. Second operand 9 states and 146 transitions. [2024-06-27 17:49:56,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 2170 flow [2024-06-27 17:49:56,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 179 transitions, 2064 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 17:49:56,518 INFO L231 Difference]: Finished difference. Result has 137 places, 149 transitions, 1639 flow [2024-06-27 17:49:56,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1639, PETRI_PLACES=137, PETRI_TRANSITIONS=149} [2024-06-27 17:49:56,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 17:49:56,519 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 149 transitions, 1639 flow [2024-06-27 17:49:56,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:56,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:56,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:49:56,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:56,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 24969112, now seen corresponding path program 1 times [2024-06-27 17:49:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:56,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121904140] [2024-06-27 17:49:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:49:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:49:58,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:49:58,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121904140] [2024-06-27 17:49:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121904140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:49:58,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:49:58,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:49:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922750539] [2024-06-27 17:49:58,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:49:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:49:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:49:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:49:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:49:58,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:49:58,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 149 transitions, 1639 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:49:58,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:49:58,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:49:58,780 INFO L124 PetriNetUnfolderBase]: 1009/1823 cut-off events. [2024-06-27 17:49:58,780 INFO L125 PetriNetUnfolderBase]: For 22286/22286 co-relation queries the response was YES. [2024-06-27 17:49:58,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9542 conditions, 1823 events. 1009/1823 cut-off events. For 22286/22286 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10002 event pairs, 245 based on Foata normal form. 2/1759 useless extension candidates. Maximal degree in co-relation 9476. Up to 1520 conditions per place. [2024-06-27 17:49:58,789 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 162 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-27 17:49:58,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 186 transitions, 2181 flow [2024-06-27 17:49:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:49:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:49:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 17:49:58,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-27 17:49:58,791 INFO L175 Difference]: Start difference. First operand has 137 places, 149 transitions, 1639 flow. Second operand 8 states and 136 transitions. [2024-06-27 17:49:58,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 186 transitions, 2181 flow [2024-06-27 17:49:58,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 2111 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 17:49:58,822 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1712 flow [2024-06-27 17:49:58,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1712, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-27 17:49:58,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 17:49:58,822 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1712 flow [2024-06-27 17:49:58,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:49:58,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:49:58,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:49:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:49:58,823 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:49:58,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:49:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 28724452, now seen corresponding path program 2 times [2024-06-27 17:49:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:49:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576377943] [2024-06-27 17:49:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:49:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:49:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:00,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:00,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576377943] [2024-06-27 17:50:00,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576377943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:00,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:00,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311979278] [2024-06-27 17:50:00,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:00,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:00,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:00,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:00,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:00,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:00,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:01,281 INFO L124 PetriNetUnfolderBase]: 1071/1937 cut-off events. [2024-06-27 17:50:01,282 INFO L125 PetriNetUnfolderBase]: For 25362/25362 co-relation queries the response was YES. [2024-06-27 17:50:01,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10334 conditions, 1937 events. 1071/1937 cut-off events. For 25362/25362 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10808 event pairs, 230 based on Foata normal form. 2/1867 useless extension candidates. Maximal degree in co-relation 10265. Up to 1480 conditions per place. [2024-06-27 17:50:01,295 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 159 selfloop transitions, 33 changer transitions 0/198 dead transitions. [2024-06-27 17:50:01,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 198 transitions, 2404 flow [2024-06-27 17:50:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 17:50:01,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-27 17:50:01,297 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1712 flow. Second operand 8 states and 142 transitions. [2024-06-27 17:50:01,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 198 transitions, 2404 flow [2024-06-27 17:50:01,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 2357 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:01,336 INFO L231 Difference]: Finished difference. Result has 147 places, 164 transitions, 1884 flow [2024-06-27 17:50:01,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=147, PETRI_TRANSITIONS=164} [2024-06-27 17:50:01,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 17:50:01,336 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 164 transitions, 1884 flow [2024-06-27 17:50:01,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:01,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:01,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:01,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:50:01,337 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:01,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 28724731, now seen corresponding path program 1 times [2024-06-27 17:50:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804717062] [2024-06-27 17:50:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804717062] [2024-06-27 17:50:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804717062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:02,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:02,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703986711] [2024-06-27 17:50:02,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:02,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:02,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 164 transitions, 1884 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:02,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:02,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:02,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:03,524 INFO L124 PetriNetUnfolderBase]: 1069/1934 cut-off events. [2024-06-27 17:50:03,524 INFO L125 PetriNetUnfolderBase]: For 27749/27749 co-relation queries the response was YES. [2024-06-27 17:50:03,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10731 conditions, 1934 events. 1069/1934 cut-off events. For 27749/27749 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10834 event pairs, 308 based on Foata normal form. 1/1863 useless extension candidates. Maximal degree in co-relation 10659. Up to 1602 conditions per place. [2024-06-27 17:50:03,537 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 157 selfloop transitions, 28 changer transitions 0/191 dead transitions. [2024-06-27 17:50:03,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 191 transitions, 2371 flow [2024-06-27 17:50:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 17:50:03,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-27 17:50:03,538 INFO L175 Difference]: Start difference. First operand has 147 places, 164 transitions, 1884 flow. Second operand 8 states and 133 transitions. [2024-06-27 17:50:03,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 191 transitions, 2371 flow [2024-06-27 17:50:03,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 191 transitions, 2309 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:03,576 INFO L231 Difference]: Finished difference. Result has 152 places, 165 transitions, 1909 flow [2024-06-27 17:50:03,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1909, PETRI_PLACES=152, PETRI_TRANSITIONS=165} [2024-06-27 17:50:03,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 17:50:03,577 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 165 transitions, 1909 flow [2024-06-27 17:50:03,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:03,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:03,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:50:03,578 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:03,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash -768707072, now seen corresponding path program 3 times [2024-06-27 17:50:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:03,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215983752] [2024-06-27 17:50:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215983752] [2024-06-27 17:50:05,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215983752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:05,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:05,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148930132] [2024-06-27 17:50:05,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:05,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:05,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 165 transitions, 1909 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:05,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:05,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:05,910 INFO L124 PetriNetUnfolderBase]: 1065/1928 cut-off events. [2024-06-27 17:50:05,910 INFO L125 PetriNetUnfolderBase]: For 28151/28151 co-relation queries the response was YES. [2024-06-27 17:50:05,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10713 conditions, 1928 events. 1065/1928 cut-off events. For 28151/28151 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10784 event pairs, 240 based on Foata normal form. 2/1858 useless extension candidates. Maximal degree in co-relation 10639. Up to 1574 conditions per place. [2024-06-27 17:50:05,922 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 162 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2024-06-27 17:50:05,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 195 transitions, 2415 flow [2024-06-27 17:50:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 17:50:05,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-27 17:50:05,924 INFO L175 Difference]: Start difference. First operand has 152 places, 165 transitions, 1909 flow. Second operand 8 states and 136 transitions. [2024-06-27 17:50:05,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 195 transitions, 2415 flow [2024-06-27 17:50:05,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 2335 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:05,967 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1945 flow [2024-06-27 17:50:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1945, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-27 17:50:05,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 17:50:05,969 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1945 flow [2024-06-27 17:50:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:05,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:05,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:05,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:50:05,970 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:05,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash -762174132, now seen corresponding path program 1 times [2024-06-27 17:50:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:05,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346291857] [2024-06-27 17:50:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:05,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:07,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:07,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346291857] [2024-06-27 17:50:07,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346291857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:07,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:07,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751748532] [2024-06-27 17:50:07,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:07,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1945 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:07,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:08,797 INFO L124 PetriNetUnfolderBase]: 1100/1994 cut-off events. [2024-06-27 17:50:08,798 INFO L125 PetriNetUnfolderBase]: For 30965/30977 co-relation queries the response was YES. [2024-06-27 17:50:08,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 1994 events. 1100/1994 cut-off events. For 30965/30977 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11245 event pairs, 314 based on Foata normal form. 10/1928 useless extension candidates. Maximal degree in co-relation 11063. Up to 1628 conditions per place. [2024-06-27 17:50:08,811 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 178 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-27 17:50:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 209 transitions, 2618 flow [2024-06-27 17:50:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 17:50:08,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2024-06-27 17:50:08,813 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1945 flow. Second operand 9 states and 152 transitions. [2024-06-27 17:50:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 209 transitions, 2618 flow [2024-06-27 17:50:08,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 209 transitions, 2520 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:08,864 INFO L231 Difference]: Finished difference. Result has 159 places, 175 transitions, 2060 flow [2024-06-27 17:50:08,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=159, PETRI_TRANSITIONS=175} [2024-06-27 17:50:08,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 17:50:08,865 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 175 transitions, 2060 flow [2024-06-27 17:50:08,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:08,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:08,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:50:08,866 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:08,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1463555562, now seen corresponding path program 4 times [2024-06-27 17:50:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99425567] [2024-06-27 17:50:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:08,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:10,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99425567] [2024-06-27 17:50:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99425567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:10,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:10,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:50:10,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38426677] [2024-06-27 17:50:10,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:10,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:50:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:50:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:50:10,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:10,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 175 transitions, 2060 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:10,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:10,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:10,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:11,468 INFO L124 PetriNetUnfolderBase]: 1148/2098 cut-off events. [2024-06-27 17:50:11,469 INFO L125 PetriNetUnfolderBase]: For 34988/35000 co-relation queries the response was YES. [2024-06-27 17:50:11,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11881 conditions, 2098 events. 1148/2098 cut-off events. For 34988/35000 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12105 event pairs, 214 based on Foata normal form. 5/2018 useless extension candidates. Maximal degree in co-relation 11803. Up to 1441 conditions per place. [2024-06-27 17:50:11,481 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 161 selfloop transitions, 52 changer transitions 0/219 dead transitions. [2024-06-27 17:50:11,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 2882 flow [2024-06-27 17:50:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 17:50:11,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-27 17:50:11,483 INFO L175 Difference]: Start difference. First operand has 159 places, 175 transitions, 2060 flow. Second operand 8 states and 145 transitions. [2024-06-27 17:50:11,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 2882 flow [2024-06-27 17:50:11,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2772 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:11,535 INFO L231 Difference]: Finished difference. Result has 165 places, 184 transitions, 2227 flow [2024-06-27 17:50:11,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2227, PETRI_PLACES=165, PETRI_TRANSITIONS=184} [2024-06-27 17:50:11,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 17:50:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 184 transitions, 2227 flow [2024-06-27 17:50:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:11,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:11,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:50:11,536 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1463565482, now seen corresponding path program 2 times [2024-06-27 17:50:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200347355] [2024-06-27 17:50:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:13,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:13,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200347355] [2024-06-27 17:50:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200347355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:13,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:13,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839987630] [2024-06-27 17:50:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:13,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:13,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:13,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 184 transitions, 2227 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:13,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:13,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:13,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:14,160 INFO L124 PetriNetUnfolderBase]: 1180/2116 cut-off events. [2024-06-27 17:50:14,160 INFO L125 PetriNetUnfolderBase]: For 38681/38693 co-relation queries the response was YES. [2024-06-27 17:50:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12623 conditions, 2116 events. 1180/2116 cut-off events. For 38681/38693 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12165 event pairs, 288 based on Foata normal form. 10/2051 useless extension candidates. Maximal degree in co-relation 12541. Up to 1653 conditions per place. [2024-06-27 17:50:14,174 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 173 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-06-27 17:50:14,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 226 transitions, 3002 flow [2024-06-27 17:50:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 17:50:14,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415954415954416 [2024-06-27 17:50:14,176 INFO L175 Difference]: Start difference. First operand has 165 places, 184 transitions, 2227 flow. Second operand 9 states and 155 transitions. [2024-06-27 17:50:14,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 226 transitions, 3002 flow [2024-06-27 17:50:14,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2928 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:14,242 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2467 flow [2024-06-27 17:50:14,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2467, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-06-27 17:50:14,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 17:50:14,244 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2467 flow [2024-06-27 17:50:14,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:14,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:14,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:14,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:50:14,244 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:14,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1149596862, now seen corresponding path program 5 times [2024-06-27 17:50:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:14,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538718769] [2024-06-27 17:50:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:15,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538718769] [2024-06-27 17:50:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538718769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:15,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:15,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 17:50:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947912809] [2024-06-27 17:50:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:15,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:50:15,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:50:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:50:15,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:15,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2467 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:15,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:15,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:15,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:16,596 INFO L124 PetriNetUnfolderBase]: 1206/2164 cut-off events. [2024-06-27 17:50:16,596 INFO L125 PetriNetUnfolderBase]: For 41793/41805 co-relation queries the response was YES. [2024-06-27 17:50:16,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13256 conditions, 2164 events. 1206/2164 cut-off events. For 41793/41805 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12428 event pairs, 268 based on Foata normal form. 5/2092 useless extension candidates. Maximal degree in co-relation 13170. Up to 1698 conditions per place. [2024-06-27 17:50:16,611 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 184 selfloop transitions, 37 changer transitions 0/227 dead transitions. [2024-06-27 17:50:16,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 227 transitions, 3169 flow [2024-06-27 17:50:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 17:50:16,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 17:50:16,613 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2467 flow. Second operand 8 states and 144 transitions. [2024-06-27 17:50:16,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 227 transitions, 3169 flow [2024-06-27 17:50:16,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 3001 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:16,682 INFO L231 Difference]: Finished difference. Result has 177 places, 194 transitions, 2409 flow [2024-06-27 17:50:16,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2409, PETRI_PLACES=177, PETRI_TRANSITIONS=194} [2024-06-27 17:50:16,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-27 17:50:16,683 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 194 transitions, 2409 flow [2024-06-27 17:50:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:16,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:16,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:50:16,684 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:16,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1149866252, now seen corresponding path program 3 times [2024-06-27 17:50:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029261478] [2024-06-27 17:50:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:18,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:18,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029261478] [2024-06-27 17:50:18,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029261478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:18,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:18,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897355996] [2024-06-27 17:50:18,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:18,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:18,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:18,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 194 transitions, 2409 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:18,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:18,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:18,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:19,205 INFO L124 PetriNetUnfolderBase]: 1238/2218 cut-off events. [2024-06-27 17:50:19,205 INFO L125 PetriNetUnfolderBase]: For 42178/42190 co-relation queries the response was YES. [2024-06-27 17:50:19,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13533 conditions, 2218 events. 1238/2218 cut-off events. For 42178/42190 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12823 event pairs, 341 based on Foata normal form. 10/2149 useless extension candidates. Maximal degree in co-relation 13446. Up to 1816 conditions per place. [2024-06-27 17:50:19,222 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 193 selfloop transitions, 32 changer transitions 0/231 dead transitions. [2024-06-27 17:50:19,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 231 transitions, 3113 flow [2024-06-27 17:50:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 17:50:19,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2024-06-27 17:50:19,224 INFO L175 Difference]: Start difference. First operand has 177 places, 194 transitions, 2409 flow. Second operand 9 states and 152 transitions. [2024-06-27 17:50:19,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 231 transitions, 3113 flow [2024-06-27 17:50:19,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 231 transitions, 2944 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:19,299 INFO L231 Difference]: Finished difference. Result has 180 places, 199 transitions, 2443 flow [2024-06-27 17:50:19,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2443, PETRI_PLACES=180, PETRI_TRANSITIONS=199} [2024-06-27 17:50:19,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 17:50:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 199 transitions, 2443 flow [2024-06-27 17:50:19,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:19,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:19,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:50:19,300 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:19,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1149589422, now seen corresponding path program 6 times [2024-06-27 17:50:19,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:19,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797684891] [2024-06-27 17:50:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797684891] [2024-06-27 17:50:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797684891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725090933] [2024-06-27 17:50:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:21,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:21,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 199 transitions, 2443 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:21,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:21,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:21,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:21,923 INFO L124 PetriNetUnfolderBase]: 1234/2214 cut-off events. [2024-06-27 17:50:21,923 INFO L125 PetriNetUnfolderBase]: For 43096/43108 co-relation queries the response was YES. [2024-06-27 17:50:21,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13385 conditions, 2214 events. 1234/2214 cut-off events. For 43096/43108 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12786 event pairs, 276 based on Foata normal form. 5/2140 useless extension candidates. Maximal degree in co-relation 13297. Up to 1798 conditions per place. [2024-06-27 17:50:21,939 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 188 selfloop transitions, 32 changer transitions 0/226 dead transitions. [2024-06-27 17:50:21,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 226 transitions, 2993 flow [2024-06-27 17:50:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 17:50:21,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391025641025641 [2024-06-27 17:50:21,940 INFO L175 Difference]: Start difference. First operand has 180 places, 199 transitions, 2443 flow. Second operand 8 states and 137 transitions. [2024-06-27 17:50:21,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 226 transitions, 2993 flow [2024-06-27 17:50:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 226 transitions, 2851 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:22,016 INFO L231 Difference]: Finished difference. Result has 184 places, 199 transitions, 2370 flow [2024-06-27 17:50:22,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2370, PETRI_PLACES=184, PETRI_TRANSITIONS=199} [2024-06-27 17:50:22,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 17:50:22,017 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 199 transitions, 2370 flow [2024-06-27 17:50:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:22,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:22,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:50:22,018 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:22,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1474993322, now seen corresponding path program 4 times [2024-06-27 17:50:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:22,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736480051] [2024-06-27 17:50:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736480051] [2024-06-27 17:50:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736480051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:23,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:23,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962787787] [2024-06-27 17:50:23,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:23,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 199 transitions, 2370 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:24,584 INFO L124 PetriNetUnfolderBase]: 1260/2281 cut-off events. [2024-06-27 17:50:24,584 INFO L125 PetriNetUnfolderBase]: For 43426/43426 co-relation queries the response was YES. [2024-06-27 17:50:24,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13606 conditions, 2281 events. 1260/2281 cut-off events. For 43426/43426 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13301 event pairs, 364 based on Foata normal form. 2/2195 useless extension candidates. Maximal degree in co-relation 13516. Up to 1943 conditions per place. [2024-06-27 17:50:24,603 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 204 selfloop transitions, 22 changer transitions 0/232 dead transitions. [2024-06-27 17:50:24,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 3042 flow [2024-06-27 17:50:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 17:50:24,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-06-27 17:50:24,604 INFO L175 Difference]: Start difference. First operand has 184 places, 199 transitions, 2370 flow. Second operand 9 states and 147 transitions. [2024-06-27 17:50:24,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 3042 flow [2024-06-27 17:50:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 232 transitions, 2963 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:24,688 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 2423 flow [2024-06-27 17:50:24,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2024-06-27 17:50:24,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 17:50:24,689 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2423 flow [2024-06-27 17:50:24,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:24,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:24,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:24,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:50:24,689 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:24,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1474607372, now seen corresponding path program 5 times [2024-06-27 17:50:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:24,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158438565] [2024-06-27 17:50:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:24,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:26,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158438565] [2024-06-27 17:50:26,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158438565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:26,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:26,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576296109] [2024-06-27 17:50:26,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:26,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:26,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:26,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:26,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2423 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:26,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:26,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:26,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:27,622 INFO L124 PetriNetUnfolderBase]: 1302/2383 cut-off events. [2024-06-27 17:50:27,622 INFO L125 PetriNetUnfolderBase]: For 48251/48263 co-relation queries the response was YES. [2024-06-27 17:50:27,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14377 conditions, 2383 events. 1302/2383 cut-off events. For 48251/48263 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14247 event pairs, 308 based on Foata normal form. 10/2293 useless extension candidates. Maximal degree in co-relation 14286. Up to 1563 conditions per place. [2024-06-27 17:50:27,640 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 174 selfloop transitions, 68 changer transitions 0/248 dead transitions. [2024-06-27 17:50:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 248 transitions, 3401 flow [2024-06-27 17:50:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 17:50:27,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2024-06-27 17:50:27,642 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 2423 flow. Second operand 9 states and 159 transitions. [2024-06-27 17:50:27,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 248 transitions, 3401 flow [2024-06-27 17:50:27,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 248 transitions, 3293 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:27,726 INFO L231 Difference]: Finished difference. Result has 190 places, 211 transitions, 2722 flow [2024-06-27 17:50:27,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2722, PETRI_PLACES=190, PETRI_TRANSITIONS=211} [2024-06-27 17:50:27,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 17:50:27,727 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 211 transitions, 2722 flow [2024-06-27 17:50:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:27,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:27,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:27,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:50:27,728 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1475007210, now seen corresponding path program 1 times [2024-06-27 17:50:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958310997] [2024-06-27 17:50:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958310997] [2024-06-27 17:50:30,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958310997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613814612] [2024-06-27 17:50:30,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:30,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 211 transitions, 2722 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,645 INFO L124 PetriNetUnfolderBase]: 1306/2354 cut-off events. [2024-06-27 17:50:31,645 INFO L125 PetriNetUnfolderBase]: For 51064/51064 co-relation queries the response was YES. [2024-06-27 17:50:31,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14884 conditions, 2354 events. 1306/2354 cut-off events. For 51064/51064 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13863 event pairs, 383 based on Foata normal form. 2/2269 useless extension candidates. Maximal degree in co-relation 14790. Up to 2007 conditions per place. [2024-06-27 17:50:31,661 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 218 selfloop transitions, 24 changer transitions 0/248 dead transitions. [2024-06-27 17:50:31,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 248 transitions, 3432 flow [2024-06-27 17:50:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 17:50:31,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2024-06-27 17:50:31,662 INFO L175 Difference]: Start difference. First operand has 190 places, 211 transitions, 2722 flow. Second operand 10 states and 162 transitions. [2024-06-27 17:50:31,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 248 transitions, 3432 flow [2024-06-27 17:50:31,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 248 transitions, 3244 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:31,756 INFO L231 Difference]: Finished difference. Result has 196 places, 213 transitions, 2645 flow [2024-06-27 17:50:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2645, PETRI_PLACES=196, PETRI_TRANSITIONS=213} [2024-06-27 17:50:31,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 17:50:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 213 transitions, 2645 flow [2024-06-27 17:50:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:50:31,758 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:31,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1094988369, now seen corresponding path program 1 times [2024-06-27 17:50:31,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835430421] [2024-06-27 17:50:31,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835430421] [2024-06-27 17:50:31,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835430421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69192549] [2024-06-27 17:50:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:31,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 17:50:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 213 transitions, 2645 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 17:50:31,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,075 INFO L124 PetriNetUnfolderBase]: 615/1161 cut-off events. [2024-06-27 17:50:32,075 INFO L125 PetriNetUnfolderBase]: For 28047/28095 co-relation queries the response was YES. [2024-06-27 17:50:32,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 1161 events. 615/1161 cut-off events. For 28047/28095 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5882 event pairs, 227 based on Foata normal form. 120/1247 useless extension candidates. Maximal degree in co-relation 7067. Up to 493 conditions per place. [2024-06-27 17:50:32,083 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 99 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2024-06-27 17:50:32,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 130 transitions, 1857 flow [2024-06-27 17:50:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 17:50:32,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-27 17:50:32,085 INFO L175 Difference]: Start difference. First operand has 196 places, 213 transitions, 2645 flow. Second operand 4 states and 100 transitions. [2024-06-27 17:50:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 130 transitions, 1857 flow [2024-06-27 17:50:32,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 130 transitions, 1373 flow, removed 64 selfloop flow, removed 68 redundant places. [2024-06-27 17:50:32,144 INFO L231 Difference]: Finished difference. Result has 133 places, 109 transitions, 1029 flow [2024-06-27 17:50:32,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1029, PETRI_PLACES=133, PETRI_TRANSITIONS=109} [2024-06-27 17:50:32,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 17:50:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 109 transitions, 1029 flow [2024-06-27 17:50:32,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:50:32,146 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:32,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 818986816, now seen corresponding path program 1 times [2024-06-27 17:50:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424292923] [2024-06-27 17:50:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424292923] [2024-06-27 17:50:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424292923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844781396] [2024-06-27 17:50:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:34,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 109 transitions, 1029 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,713 INFO L124 PetriNetUnfolderBase]: 742/1350 cut-off events. [2024-06-27 17:50:34,714 INFO L125 PetriNetUnfolderBase]: For 27666/27666 co-relation queries the response was YES. [2024-06-27 17:50:34,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7244 conditions, 1350 events. 742/1350 cut-off events. For 27666/27666 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6580 event pairs, 202 based on Foata normal form. 2/1301 useless extension candidates. Maximal degree in co-relation 7177. Up to 1126 conditions per place. [2024-06-27 17:50:34,723 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 20 changer transitions 0/151 dead transitions. [2024-06-27 17:50:34,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1532 flow [2024-06-27 17:50:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 17:50:34,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-06-27 17:50:34,757 INFO L175 Difference]: Start difference. First operand has 133 places, 109 transitions, 1029 flow. Second operand 9 states and 145 transitions. [2024-06-27 17:50:34,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1532 flow [2024-06-27 17:50:34,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 151 transitions, 1525 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:34,797 INFO L231 Difference]: Finished difference. Result has 143 places, 121 transitions, 1197 flow [2024-06-27 17:50:34,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1197, PETRI_PLACES=143, PETRI_TRANSITIONS=121} [2024-06-27 17:50:34,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 17:50:34,798 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 121 transitions, 1197 flow [2024-06-27 17:50:34,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:50:34,799 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:34,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash 771150716, now seen corresponding path program 2 times [2024-06-27 17:50:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171926224] [2024-06-27 17:50:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171926224] [2024-06-27 17:50:36,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171926224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:36,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738775616] [2024-06-27 17:50:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:36,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:36,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:36,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 121 transitions, 1197 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,141 INFO L124 PetriNetUnfolderBase]: 758/1379 cut-off events. [2024-06-27 17:50:37,142 INFO L125 PetriNetUnfolderBase]: For 29803/29803 co-relation queries the response was YES. [2024-06-27 17:50:37,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7781 conditions, 1379 events. 758/1379 cut-off events. For 29803/29803 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6784 event pairs, 118 based on Foata normal form. 2/1330 useless extension candidates. Maximal degree in co-relation 7708. Up to 1104 conditions per place. [2024-06-27 17:50:37,151 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 121 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2024-06-27 17:50:37,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 151 transitions, 1646 flow [2024-06-27 17:50:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 17:50:37,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-06-27 17:50:37,152 INFO L175 Difference]: Start difference. First operand has 143 places, 121 transitions, 1197 flow. Second operand 8 states and 127 transitions. [2024-06-27 17:50:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 151 transitions, 1646 flow [2024-06-27 17:50:37,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 151 transitions, 1613 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:37,195 INFO L231 Difference]: Finished difference. Result has 149 places, 126 transitions, 1307 flow [2024-06-27 17:50:37,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1307, PETRI_PLACES=149, PETRI_TRANSITIONS=126} [2024-06-27 17:50:37,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 17:50:37,196 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 126 transitions, 1307 flow [2024-06-27 17:50:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:50:37,197 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:37,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1824145104, now seen corresponding path program 3 times [2024-06-27 17:50:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713295954] [2024-06-27 17:50:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:39,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713295954] [2024-06-27 17:50:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713295954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:39,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:39,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592957572] [2024-06-27 17:50:39,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:39,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:39,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 126 transitions, 1307 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:39,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:39,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:39,750 INFO L124 PetriNetUnfolderBase]: 774/1408 cut-off events. [2024-06-27 17:50:39,750 INFO L125 PetriNetUnfolderBase]: For 32443/32443 co-relation queries the response was YES. [2024-06-27 17:50:39,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8137 conditions, 1408 events. 774/1408 cut-off events. For 32443/32443 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6951 event pairs, 212 based on Foata normal form. 2/1358 useless extension candidates. Maximal degree in co-relation 8062. Up to 1188 conditions per place. [2024-06-27 17:50:39,760 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 125 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2024-06-27 17:50:39,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 152 transitions, 1731 flow [2024-06-27 17:50:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 17:50:39,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 17:50:39,761 INFO L175 Difference]: Start difference. First operand has 149 places, 126 transitions, 1307 flow. Second operand 8 states and 126 transitions. [2024-06-27 17:50:39,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 152 transitions, 1731 flow [2024-06-27 17:50:39,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 152 transitions, 1645 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:39,814 INFO L231 Difference]: Finished difference. Result has 152 places, 128 transitions, 1322 flow [2024-06-27 17:50:39,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=152, PETRI_TRANSITIONS=128} [2024-06-27 17:50:39,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 17:50:39,820 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 128 transitions, 1322 flow [2024-06-27 17:50:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:50:39,826 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:39,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1824296198, now seen corresponding path program 1 times [2024-06-27 17:50:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:39,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036608128] [2024-06-27 17:50:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:39,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036608128] [2024-06-27 17:50:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036608128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:50:41,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409496239] [2024-06-27 17:50:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:50:41,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:50:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:50:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 128 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,407 INFO L124 PetriNetUnfolderBase]: 785/1425 cut-off events. [2024-06-27 17:50:42,407 INFO L125 PetriNetUnfolderBase]: For 33757/33757 co-relation queries the response was YES. [2024-06-27 17:50:42,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8156 conditions, 1425 events. 785/1425 cut-off events. For 33757/33757 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7053 event pairs, 214 based on Foata normal form. 2/1373 useless extension candidates. Maximal degree in co-relation 8080. Up to 1197 conditions per place. [2024-06-27 17:50:42,417 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 22 changer transitions 0/155 dead transitions. [2024-06-27 17:50:42,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 155 transitions, 1728 flow [2024-06-27 17:50:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 17:50:42,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903133903133903 [2024-06-27 17:50:42,418 INFO L175 Difference]: Start difference. First operand has 152 places, 128 transitions, 1322 flow. Second operand 9 states and 137 transitions. [2024-06-27 17:50:42,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 155 transitions, 1728 flow [2024-06-27 17:50:42,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 155 transitions, 1641 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:42,476 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 1320 flow [2024-06-27 17:50:42,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1320, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2024-06-27 17:50:42,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 17:50:42,477 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 1320 flow [2024-06-27 17:50:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:42,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:50:42,478 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:42,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1940481098, now seen corresponding path program 2 times [2024-06-27 17:50:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476121215] [2024-06-27 17:50:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476121215] [2024-06-27 17:50:44,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476121215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:44,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712214995] [2024-06-27 17:50:44,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:44,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:44,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 1320 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:44,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:44,914 INFO L124 PetriNetUnfolderBase]: 796/1441 cut-off events. [2024-06-27 17:50:44,915 INFO L125 PetriNetUnfolderBase]: For 34629/34629 co-relation queries the response was YES. [2024-06-27 17:50:44,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8238 conditions, 1441 events. 796/1441 cut-off events. For 34629/34629 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7134 event pairs, 203 based on Foata normal form. 2/1388 useless extension candidates. Maximal degree in co-relation 8161. Up to 1180 conditions per place. [2024-06-27 17:50:44,922 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 26 changer transitions 0/155 dead transitions. [2024-06-27 17:50:44,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 155 transitions, 1718 flow [2024-06-27 17:50:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 17:50:44,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-27 17:50:44,923 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 1320 flow. Second operand 9 states and 138 transitions. [2024-06-27 17:50:44,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 155 transitions, 1718 flow [2024-06-27 17:50:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 155 transitions, 1653 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:44,980 INFO L231 Difference]: Finished difference. Result has 157 places, 132 transitions, 1352 flow [2024-06-27 17:50:44,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=157, PETRI_TRANSITIONS=132} [2024-06-27 17:50:44,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 17:50:44,981 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 132 transitions, 1352 flow [2024-06-27 17:50:44,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:44,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:44,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:50:44,981 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:44,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1940474154, now seen corresponding path program 4 times [2024-06-27 17:50:44,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:44,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517874789] [2024-06-27 17:50:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:44,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517874789] [2024-06-27 17:50:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517874789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:46,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150716253] [2024-06-27 17:50:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:46,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:46,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:46,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 132 transitions, 1352 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:46,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:46,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:47,491 INFO L124 PetriNetUnfolderBase]: 816/1484 cut-off events. [2024-06-27 17:50:47,491 INFO L125 PetriNetUnfolderBase]: For 37095/37095 co-relation queries the response was YES. [2024-06-27 17:50:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8534 conditions, 1484 events. 816/1484 cut-off events. For 37095/37095 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7456 event pairs, 207 based on Foata normal form. 2/1429 useless extension candidates. Maximal degree in co-relation 8456. Up to 1218 conditions per place. [2024-06-27 17:50:47,500 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 127 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2024-06-27 17:50:47,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 157 transitions, 1778 flow [2024-06-27 17:50:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 17:50:47,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-27 17:50:47,503 INFO L175 Difference]: Start difference. First operand has 157 places, 132 transitions, 1352 flow. Second operand 8 states and 128 transitions. [2024-06-27 17:50:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 157 transitions, 1778 flow [2024-06-27 17:50:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 1701 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:47,569 INFO L231 Difference]: Finished difference. Result has 158 places, 133 transitions, 1345 flow [2024-06-27 17:50:47,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=158, PETRI_TRANSITIONS=133} [2024-06-27 17:50:47,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-27 17:50:47,571 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 133 transitions, 1345 flow [2024-06-27 17:50:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:47,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:47,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:50:47,571 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:47,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 486195244, now seen corresponding path program 3 times [2024-06-27 17:50:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703535415] [2024-06-27 17:50:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:47,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:49,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:49,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703535415] [2024-06-27 17:50:49,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703535415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:49,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:49,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694720670] [2024-06-27 17:50:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:49,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:49,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:49,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:49,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 133 transitions, 1345 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:49,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:49,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:49,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:50,196 INFO L124 PetriNetUnfolderBase]: 842/1524 cut-off events. [2024-06-27 17:50:50,197 INFO L125 PetriNetUnfolderBase]: For 40814/40814 co-relation queries the response was YES. [2024-06-27 17:50:50,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8902 conditions, 1524 events. 842/1524 cut-off events. For 40814/40814 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7679 event pairs, 207 based on Foata normal form. 2/1466 useless extension candidates. Maximal degree in co-relation 8823. Up to 1152 conditions per place. [2024-06-27 17:50:50,206 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 116 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-27 17:50:50,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 163 transitions, 1897 flow [2024-06-27 17:50:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 17:50:50,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 17:50:50,207 INFO L175 Difference]: Start difference. First operand has 158 places, 133 transitions, 1345 flow. Second operand 9 states and 143 transitions. [2024-06-27 17:50:50,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 163 transitions, 1897 flow [2024-06-27 17:50:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 163 transitions, 1845 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:50,270 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 1463 flow [2024-06-27 17:50:50,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1463, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2024-06-27 17:50:50,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 17:50:50,271 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 1463 flow [2024-06-27 17:50:50,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:50,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:50:50,272 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:50,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1940125772, now seen corresponding path program 1 times [2024-06-27 17:50:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925173524] [2024-06-27 17:50:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925173524] [2024-06-27 17:50:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925173524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:51,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:51,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663839767] [2024-06-27 17:50:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:51,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:51,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 137 transitions, 1463 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:51,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:52,293 INFO L124 PetriNetUnfolderBase]: 840/1522 cut-off events. [2024-06-27 17:50:52,294 INFO L125 PetriNetUnfolderBase]: For 40389/40389 co-relation queries the response was YES. [2024-06-27 17:50:52,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8934 conditions, 1522 events. 840/1522 cut-off events. For 40389/40389 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7713 event pairs, 247 based on Foata normal form. 1/1463 useless extension candidates. Maximal degree in co-relation 8854. Up to 1309 conditions per place. [2024-06-27 17:50:52,304 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 127 selfloop transitions, 26 changer transitions 0/160 dead transitions. [2024-06-27 17:50:52,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 160 transitions, 1849 flow [2024-06-27 17:50:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 17:50:52,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817663817663818 [2024-06-27 17:50:52,306 INFO L175 Difference]: Start difference. First operand has 161 places, 137 transitions, 1463 flow. Second operand 9 states and 134 transitions. [2024-06-27 17:50:52,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 160 transitions, 1849 flow [2024-06-27 17:50:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 160 transitions, 1760 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:52,383 INFO L231 Difference]: Finished difference. Result has 165 places, 137 transitions, 1434 flow [2024-06-27 17:50:52,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1434, PETRI_PLACES=165, PETRI_TRANSITIONS=137} [2024-06-27 17:50:52,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 17:50:52,385 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 137 transitions, 1434 flow [2024-06-27 17:50:52,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:52,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:52,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:52,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:50:52,385 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:52,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 890459920, now seen corresponding path program 4 times [2024-06-27 17:50:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:52,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967569165] [2024-06-27 17:50:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:54,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:54,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967569165] [2024-06-27 17:50:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967569165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:54,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:54,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411483807] [2024-06-27 17:50:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:54,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 137 transitions, 1434 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:54,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:54,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:54,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:55,222 INFO L124 PetriNetUnfolderBase]: 836/1515 cut-off events. [2024-06-27 17:50:55,223 INFO L125 PetriNetUnfolderBase]: For 40097/40097 co-relation queries the response was YES. [2024-06-27 17:50:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8778 conditions, 1515 events. 836/1515 cut-off events. For 40097/40097 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7628 event pairs, 206 based on Foata normal form. 2/1457 useless extension candidates. Maximal degree in co-relation 8696. Up to 1203 conditions per place. [2024-06-27 17:50:55,233 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 122 selfloop transitions, 32 changer transitions 0/161 dead transitions. [2024-06-27 17:50:55,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 161 transitions, 1812 flow [2024-06-27 17:50:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:50:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39886039886039887 [2024-06-27 17:50:55,235 INFO L175 Difference]: Start difference. First operand has 165 places, 137 transitions, 1434 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:50:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 161 transitions, 1812 flow [2024-06-27 17:50:55,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 161 transitions, 1684 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 17:50:55,310 INFO L231 Difference]: Finished difference. Result has 164 places, 137 transitions, 1375 flow [2024-06-27 17:50:55,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1375, PETRI_PLACES=164, PETRI_TRANSITIONS=137} [2024-06-27 17:50:55,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 17:50:55,310 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 137 transitions, 1375 flow [2024-06-27 17:50:55,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:55,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 17:50:55,311 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:55,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1092155836, now seen corresponding path program 1 times [2024-06-27 17:50:55,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:55,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627202177] [2024-06-27 17:50:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:58,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627202177] [2024-06-27 17:50:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627202177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:50:58,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870997904] [2024-06-27 17:50:58,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:50:58,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:50:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:50:58,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:50:58,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 137 transitions, 1375 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:58,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:58,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:50:58,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:59,014 INFO L124 PetriNetUnfolderBase]: 848/1534 cut-off events. [2024-06-27 17:50:59,015 INFO L125 PetriNetUnfolderBase]: For 41794/41797 co-relation queries the response was YES. [2024-06-27 17:50:59,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8787 conditions, 1534 events. 848/1534 cut-off events. For 41794/41797 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7762 event pairs, 244 based on Foata normal form. 4/1474 useless extension candidates. Maximal degree in co-relation 8706. Up to 1331 conditions per place. [2024-06-27 17:50:59,025 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 139 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-27 17:50:59,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 167 transitions, 1833 flow [2024-06-27 17:50:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 17:50:59,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 17:50:59,026 INFO L175 Difference]: Start difference. First operand has 164 places, 137 transitions, 1375 flow. Second operand 10 states and 147 transitions. [2024-06-27 17:50:59,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 167 transitions, 1833 flow [2024-06-27 17:50:59,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 1745 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:59,105 INFO L231 Difference]: Finished difference. Result has 166 places, 139 transitions, 1374 flow [2024-06-27 17:50:59,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=166, PETRI_TRANSITIONS=139} [2024-06-27 17:50:59,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 17:50:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 139 transitions, 1374 flow [2024-06-27 17:50:59,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:59,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:59,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 17:50:59,107 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:50:59,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1277528678, now seen corresponding path program 5 times [2024-06-27 17:50:59,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:59,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573386183] [2024-06-27 17:50:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:59,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:01,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:01,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573386183] [2024-06-27 17:51:01,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573386183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:01,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:01,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853877688] [2024-06-27 17:51:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:01,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:01,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:01,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:01,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:01,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 139 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:01,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:01,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:02,210 INFO L124 PetriNetUnfolderBase]: 848/1535 cut-off events. [2024-06-27 17:51:02,210 INFO L125 PetriNetUnfolderBase]: For 41402/41405 co-relation queries the response was YES. [2024-06-27 17:51:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8710 conditions, 1535 events. 848/1535 cut-off events. For 41402/41405 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7726 event pairs, 208 based on Foata normal form. 2/1471 useless extension candidates. Maximal degree in co-relation 8628. Up to 1248 conditions per place. [2024-06-27 17:51:02,219 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 128 selfloop transitions, 27 changer transitions 0/162 dead transitions. [2024-06-27 17:51:02,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 162 transitions, 1808 flow [2024-06-27 17:51:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 17:51:02,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-06-27 17:51:02,221 INFO L175 Difference]: Start difference. First operand has 166 places, 139 transitions, 1374 flow. Second operand 8 states and 127 transitions. [2024-06-27 17:51:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 162 transitions, 1808 flow [2024-06-27 17:51:02,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 162 transitions, 1741 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:02,301 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1426 flow [2024-06-27 17:51:02,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1426, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-27 17:51:02,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 17:51:02,302 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1426 flow [2024-06-27 17:51:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 17:51:02,302 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:02,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -445606406, now seen corresponding path program 5 times [2024-06-27 17:51:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099061148] [2024-06-27 17:51:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:04,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099061148] [2024-06-27 17:51:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099061148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:04,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595831527] [2024-06-27 17:51:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:04,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:04,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1426 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:04,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:05,011 INFO L124 PetriNetUnfolderBase]: 859/1552 cut-off events. [2024-06-27 17:51:05,012 INFO L125 PetriNetUnfolderBase]: For 43796/43799 co-relation queries the response was YES. [2024-06-27 17:51:05,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8908 conditions, 1552 events. 859/1552 cut-off events. For 43796/43799 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7834 event pairs, 196 based on Foata normal form. 2/1486 useless extension candidates. Maximal degree in co-relation 8825. Up to 1010 conditions per place. [2024-06-27 17:51:05,020 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 103 selfloop transitions, 60 changer transitions 0/170 dead transitions. [2024-06-27 17:51:05,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 170 transitions, 2008 flow [2024-06-27 17:51:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 17:51:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-06-27 17:51:05,022 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1426 flow. Second operand 9 states and 145 transitions. [2024-06-27 17:51:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 170 transitions, 2008 flow [2024-06-27 17:51:05,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 1905 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:05,112 INFO L231 Difference]: Finished difference. Result has 169 places, 145 transitions, 1540 flow [2024-06-27 17:51:05,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1540, PETRI_PLACES=169, PETRI_TRANSITIONS=145} [2024-06-27 17:51:05,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 17:51:05,112 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 145 transitions, 1540 flow [2024-06-27 17:51:05,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:05,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:05,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 17:51:05,113 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:05,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash -445595494, now seen corresponding path program 2 times [2024-06-27 17:51:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:05,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822736137] [2024-06-27 17:51:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:07,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:07,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822736137] [2024-06-27 17:51:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822736137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795517330] [2024-06-27 17:51:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:07,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:07,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 145 transitions, 1540 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:07,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:07,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:07,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:08,438 INFO L124 PetriNetUnfolderBase]: 871/1571 cut-off events. [2024-06-27 17:51:08,439 INFO L125 PetriNetUnfolderBase]: For 45068/45071 co-relation queries the response was YES. [2024-06-27 17:51:08,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 1571 events. 871/1571 cut-off events. For 45068/45071 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7969 event pairs, 233 based on Foata normal form. 4/1506 useless extension candidates. Maximal degree in co-relation 9032. Up to 1264 conditions per place. [2024-06-27 17:51:08,448 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 124 selfloop transitions, 41 changer transitions 0/172 dead transitions. [2024-06-27 17:51:08,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 172 transitions, 1998 flow [2024-06-27 17:51:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-27 17:51:08,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382051282051282 [2024-06-27 17:51:08,450 INFO L175 Difference]: Start difference. First operand has 169 places, 145 transitions, 1540 flow. Second operand 10 states and 149 transitions. [2024-06-27 17:51:08,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 172 transitions, 1998 flow [2024-06-27 17:51:08,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 172 transitions, 1893 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:08,547 INFO L231 Difference]: Finished difference. Result has 174 places, 147 transitions, 1566 flow [2024-06-27 17:51:08,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1566, PETRI_PLACES=174, PETRI_TRANSITIONS=147} [2024-06-27 17:51:08,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 17:51:08,547 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 147 transitions, 1566 flow [2024-06-27 17:51:08,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:08,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:08,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:08,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 17:51:08,548 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:08,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1564328818, now seen corresponding path program 6 times [2024-06-27 17:51:08,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:08,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769236142] [2024-06-27 17:51:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:10,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:10,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769236142] [2024-06-27 17:51:10,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769236142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:10,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:10,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713357317] [2024-06-27 17:51:10,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:10,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 147 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:11,127 INFO L124 PetriNetUnfolderBase]: 897/1610 cut-off events. [2024-06-27 17:51:11,127 INFO L125 PetriNetUnfolderBase]: For 48651/48654 co-relation queries the response was YES. [2024-06-27 17:51:11,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9544 conditions, 1610 events. 897/1610 cut-off events. For 48651/48654 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8178 event pairs, 211 based on Foata normal form. 2/1540 useless extension candidates. Maximal degree in co-relation 9458. Up to 1260 conditions per place. [2024-06-27 17:51:11,138 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 135 selfloop transitions, 35 changer transitions 0/177 dead transitions. [2024-06-27 17:51:11,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 177 transitions, 2164 flow [2024-06-27 17:51:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 17:51:11,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-06-27 17:51:11,139 INFO L175 Difference]: Start difference. First operand has 174 places, 147 transitions, 1566 flow. Second operand 9 states and 145 transitions. [2024-06-27 17:51:11,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 177 transitions, 2164 flow [2024-06-27 17:51:11,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 177 transitions, 2053 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:11,248 INFO L231 Difference]: Finished difference. Result has 175 places, 151 transitions, 1618 flow [2024-06-27 17:51:11,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=175, PETRI_TRANSITIONS=151} [2024-06-27 17:51:11,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 17:51:11,249 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 151 transitions, 1618 flow [2024-06-27 17:51:11,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:11,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:11,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:11,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 17:51:11,250 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:11,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1251990778, now seen corresponding path program 7 times [2024-06-27 17:51:11,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:11,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632035594] [2024-06-27 17:51:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:13,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:13,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632035594] [2024-06-27 17:51:13,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632035594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:13,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:13,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013573258] [2024-06-27 17:51:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:13,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:13,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 151 transitions, 1618 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:14,226 INFO L124 PetriNetUnfolderBase]: 908/1627 cut-off events. [2024-06-27 17:51:14,226 INFO L125 PetriNetUnfolderBase]: For 50491/50494 co-relation queries the response was YES. [2024-06-27 17:51:14,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9689 conditions, 1627 events. 908/1627 cut-off events. For 50491/50494 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8241 event pairs, 211 based on Foata normal form. 2/1556 useless extension candidates. Maximal degree in co-relation 9602. Up to 1309 conditions per place. [2024-06-27 17:51:14,239 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 138 selfloop transitions, 32 changer transitions 0/177 dead transitions. [2024-06-27 17:51:14,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 177 transitions, 2074 flow [2024-06-27 17:51:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:51:14,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045584045584046 [2024-06-27 17:51:14,240 INFO L175 Difference]: Start difference. First operand has 175 places, 151 transitions, 1618 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:51:14,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 177 transitions, 2074 flow [2024-06-27 17:51:14,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 1995 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:14,352 INFO L231 Difference]: Finished difference. Result has 179 places, 153 transitions, 1658 flow [2024-06-27 17:51:14,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1658, PETRI_PLACES=179, PETRI_TRANSITIONS=153} [2024-06-27 17:51:14,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 17:51:14,353 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 153 transitions, 1658 flow [2024-06-27 17:51:14,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:14,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:14,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 17:51:14,354 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:14,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1260341930, now seen corresponding path program 3 times [2024-06-27 17:51:14,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402039134] [2024-06-27 17:51:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402039134] [2024-06-27 17:51:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402039134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:16,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:16,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576791858] [2024-06-27 17:51:16,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:16,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:16,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:16,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:16,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:16,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:16,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 153 transitions, 1658 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:16,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:16,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:16,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:17,640 INFO L124 PetriNetUnfolderBase]: 920/1646 cut-off events. [2024-06-27 17:51:17,641 INFO L125 PetriNetUnfolderBase]: For 51992/51995 co-relation queries the response was YES. [2024-06-27 17:51:17,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9864 conditions, 1646 events. 920/1646 cut-off events. For 51992/51995 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8395 event pairs, 252 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 9775. Up to 1418 conditions per place. [2024-06-27 17:51:17,652 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 148 selfloop transitions, 25 changer transitions 0/180 dead transitions. [2024-06-27 17:51:17,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 180 transitions, 2136 flow [2024-06-27 17:51:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 17:51:17,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 17:51:17,654 INFO L175 Difference]: Start difference. First operand has 179 places, 153 transitions, 1658 flow. Second operand 10 states and 147 transitions. [2024-06-27 17:51:17,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 180 transitions, 2136 flow [2024-06-27 17:51:17,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 180 transitions, 2049 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:17,760 INFO L231 Difference]: Finished difference. Result has 182 places, 155 transitions, 1674 flow [2024-06-27 17:51:17,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1674, PETRI_PLACES=182, PETRI_TRANSITIONS=155} [2024-06-27 17:51:17,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 17:51:17,760 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 155 transitions, 1674 flow [2024-06-27 17:51:17,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:17,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:17,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:17,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 17:51:17,761 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:17,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1519429594, now seen corresponding path program 4 times [2024-06-27 17:51:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:17,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311052822] [2024-06-27 17:51:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:19,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:19,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311052822] [2024-06-27 17:51:19,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311052822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:19,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:19,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:19,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002362642] [2024-06-27 17:51:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:19,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:19,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 155 transitions, 1674 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:19,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:19,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:20,344 INFO L124 PetriNetUnfolderBase]: 948/1685 cut-off events. [2024-06-27 17:51:20,344 INFO L125 PetriNetUnfolderBase]: For 56886/56886 co-relation queries the response was YES. [2024-06-27 17:51:20,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10257 conditions, 1685 events. 948/1685 cut-off events. For 56886/56886 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8563 event pairs, 280 based on Foata normal form. 2/1613 useless extension candidates. Maximal degree in co-relation 10167. Up to 1519 conditions per place. [2024-06-27 17:51:20,356 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 151 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-27 17:51:20,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 177 transitions, 2270 flow [2024-06-27 17:51:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-27 17:51:20,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-06-27 17:51:20,358 INFO L175 Difference]: Start difference. First operand has 182 places, 155 transitions, 1674 flow. Second operand 9 states and 132 transitions. [2024-06-27 17:51:20,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 177 transitions, 2270 flow [2024-06-27 17:51:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 177 transitions, 2187 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:20,471 INFO L231 Difference]: Finished difference. Result has 183 places, 159 transitions, 1737 flow [2024-06-27 17:51:20,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=183, PETRI_TRANSITIONS=159} [2024-06-27 17:51:20,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 17:51:20,472 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 159 transitions, 1737 flow [2024-06-27 17:51:20,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:20,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:20,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 17:51:20,472 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:20,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1277535622, now seen corresponding path program 8 times [2024-06-27 17:51:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707829909] [2024-06-27 17:51:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:20,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:22,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:22,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707829909] [2024-06-27 17:51:22,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707829909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:22,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:22,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:22,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517230373] [2024-06-27 17:51:22,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:22,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:22,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:22,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:22,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 159 transitions, 1737 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:22,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:22,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:22,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:23,052 INFO L124 PetriNetUnfolderBase]: 944/1681 cut-off events. [2024-06-27 17:51:23,052 INFO L125 PetriNetUnfolderBase]: For 55678/55681 co-relation queries the response was YES. [2024-06-27 17:51:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1681 events. 944/1681 cut-off events. For 55678/55681 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8548 event pairs, 218 based on Foata normal form. 2/1604 useless extension candidates. Maximal degree in co-relation 10029. Up to 1386 conditions per place. [2024-06-27 17:51:23,063 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 145 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-27 17:51:23,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 181 transitions, 2149 flow [2024-06-27 17:51:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 17:51:23,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-27 17:51:23,066 INFO L175 Difference]: Start difference. First operand has 183 places, 159 transitions, 1737 flow. Second operand 9 states and 138 transitions. [2024-06-27 17:51:23,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 181 transitions, 2149 flow [2024-06-27 17:51:23,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 181 transitions, 2067 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:23,196 INFO L231 Difference]: Finished difference. Result has 187 places, 159 transitions, 1718 flow [2024-06-27 17:51:23,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1718, PETRI_PLACES=187, PETRI_TRANSITIONS=159} [2024-06-27 17:51:23,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 17:51:23,196 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 159 transitions, 1718 flow [2024-06-27 17:51:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:23,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:23,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:23,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 17:51:23,197 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:23,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:23,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1519845304, now seen corresponding path program 5 times [2024-06-27 17:51:23,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:23,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917506980] [2024-06-27 17:51:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:23,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917506980] [2024-06-27 17:51:26,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917506980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:26,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:26,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990814682] [2024-06-27 17:51:26,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:26,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:26,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 159 transitions, 1718 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:26,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:26,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:26,715 INFO L124 PetriNetUnfolderBase]: 940/1673 cut-off events. [2024-06-27 17:51:26,715 INFO L125 PetriNetUnfolderBase]: For 53764/53764 co-relation queries the response was YES. [2024-06-27 17:51:26,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9980 conditions, 1673 events. 940/1673 cut-off events. For 53764/53764 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8495 event pairs, 279 based on Foata normal form. 2/1601 useless extension candidates. Maximal degree in co-relation 9887. Up to 1525 conditions per place. [2024-06-27 17:51:26,727 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 155 selfloop transitions, 16 changer transitions 0/178 dead transitions. [2024-06-27 17:51:26,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 178 transitions, 2120 flow [2024-06-27 17:51:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-27 17:51:26,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-06-27 17:51:26,728 INFO L175 Difference]: Start difference. First operand has 187 places, 159 transitions, 1718 flow. Second operand 10 states and 140 transitions. [2024-06-27 17:51:26,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 178 transitions, 2120 flow [2024-06-27 17:51:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 178 transitions, 2022 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:26,856 INFO L231 Difference]: Finished difference. Result has 189 places, 159 transitions, 1657 flow [2024-06-27 17:51:26,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1657, PETRI_PLACES=189, PETRI_TRANSITIONS=159} [2024-06-27 17:51:26,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 17:51:26,857 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 159 transitions, 1657 flow [2024-06-27 17:51:26,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:26,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:26,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:26,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 17:51:26,858 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:26,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1874407556, now seen corresponding path program 9 times [2024-06-27 17:51:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909213582] [2024-06-27 17:51:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909213582] [2024-06-27 17:51:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909213582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:28,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:28,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 17:51:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839120679] [2024-06-27 17:51:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:51:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:51:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:51:28,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:28,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 159 transitions, 1657 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:28,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:28,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:28,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:29,486 INFO L124 PetriNetUnfolderBase]: 951/1692 cut-off events. [2024-06-27 17:51:29,486 INFO L125 PetriNetUnfolderBase]: For 55328/55331 co-relation queries the response was YES. [2024-06-27 17:51:29,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 1692 events. 951/1692 cut-off events. For 55328/55331 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8597 event pairs, 204 based on Foata normal form. 2/1614 useless extension candidates. Maximal degree in co-relation 9909. Up to 1266 conditions per place. [2024-06-27 17:51:29,498 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 133 selfloop transitions, 47 changer transitions 0/187 dead transitions. [2024-06-27 17:51:29,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 187 transitions, 2249 flow [2024-06-27 17:51:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 17:51:29,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41595441595441596 [2024-06-27 17:51:29,499 INFO L175 Difference]: Start difference. First operand has 189 places, 159 transitions, 1657 flow. Second operand 9 states and 146 transitions. [2024-06-27 17:51:29,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 187 transitions, 2249 flow [2024-06-27 17:51:29,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 187 transitions, 2209 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:29,623 INFO L231 Difference]: Finished difference. Result has 189 places, 161 transitions, 1762 flow [2024-06-27 17:51:29,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1762, PETRI_PLACES=189, PETRI_TRANSITIONS=161} [2024-06-27 17:51:29,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 17:51:29,623 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 161 transitions, 1762 flow [2024-06-27 17:51:29,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:29,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 17:51:29,624 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -787894084, now seen corresponding path program 6 times [2024-06-27 17:51:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811743027] [2024-06-27 17:51:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:32,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:32,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811743027] [2024-06-27 17:51:32,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811743027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:32,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:32,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:32,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027576146] [2024-06-27 17:51:32,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:32,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:32,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:32,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:32,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 161 transitions, 1762 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:32,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:32,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:32,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:33,160 INFO L124 PetriNetUnfolderBase]: 955/1699 cut-off events. [2024-06-27 17:51:33,160 INFO L125 PetriNetUnfolderBase]: For 56295/56298 co-relation queries the response was YES. [2024-06-27 17:51:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10221 conditions, 1699 events. 955/1699 cut-off events. For 56295/56298 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8656 event pairs, 251 based on Foata normal form. 4/1623 useless extension candidates. Maximal degree in co-relation 10126. Up to 1438 conditions per place. [2024-06-27 17:51:33,174 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 149 selfloop transitions, 32 changer transitions 0/188 dead transitions. [2024-06-27 17:51:33,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 188 transitions, 2264 flow [2024-06-27 17:51:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 17:51:33,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2024-06-27 17:51:33,175 INFO L175 Difference]: Start difference. First operand has 189 places, 161 transitions, 1762 flow. Second operand 10 states and 148 transitions. [2024-06-27 17:51:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 188 transitions, 2264 flow [2024-06-27 17:51:33,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 2061 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 17:51:33,335 INFO L231 Difference]: Finished difference. Result has 190 places, 163 transitions, 1684 flow [2024-06-27 17:51:33,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1684, PETRI_PLACES=190, PETRI_TRANSITIONS=163} [2024-06-27 17:51:33,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 17:51:33,336 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 163 transitions, 1684 flow [2024-06-27 17:51:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:33,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:33,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 17:51:33,337 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:33,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -788201666, now seen corresponding path program 10 times [2024-06-27 17:51:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140919849] [2024-06-27 17:51:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:35,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:35,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140919849] [2024-06-27 17:51:35,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140919849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914330373] [2024-06-27 17:51:35,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:35,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:35,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:35,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:35,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 163 transitions, 1684 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:35,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:35,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:35,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:36,297 INFO L124 PetriNetUnfolderBase]: 951/1692 cut-off events. [2024-06-27 17:51:36,297 INFO L125 PetriNetUnfolderBase]: For 53833/53836 co-relation queries the response was YES. [2024-06-27 17:51:36,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 1692 events. 951/1692 cut-off events. For 53833/53836 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8616 event pairs, 204 based on Foata normal form. 2/1613 useless extension candidates. Maximal degree in co-relation 9609. Up to 1292 conditions per place. [2024-06-27 17:51:36,311 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 135 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-27 17:51:36,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 186 transitions, 2110 flow [2024-06-27 17:51:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:51:36,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:51:36,312 INFO L175 Difference]: Start difference. First operand has 190 places, 163 transitions, 1684 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:51:36,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 186 transitions, 2110 flow [2024-06-27 17:51:36,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 186 transitions, 1983 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:36,515 INFO L231 Difference]: Finished difference. Result has 191 places, 163 transitions, 1650 flow [2024-06-27 17:51:36,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1650, PETRI_PLACES=191, PETRI_TRANSITIONS=163} [2024-06-27 17:51:36,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 17:51:36,515 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 163 transitions, 1650 flow [2024-06-27 17:51:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:36,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:36,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 17:51:36,516 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:36,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:36,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1509989741, now seen corresponding path program 1 times [2024-06-27 17:51:36,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:36,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314806693] [2024-06-27 17:51:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:38,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:38,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314806693] [2024-06-27 17:51:38,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314806693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:38,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228943884] [2024-06-27 17:51:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:38,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:38,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:38,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 163 transitions, 1650 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:38,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:38,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:39,275 INFO L124 PetriNetUnfolderBase]: 971/1734 cut-off events. [2024-06-27 17:51:39,276 INFO L125 PetriNetUnfolderBase]: For 55388/55388 co-relation queries the response was YES. [2024-06-27 17:51:39,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9883 conditions, 1734 events. 971/1734 cut-off events. For 55388/55388 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8910 event pairs, 144 based on Foata normal form. 2/1661 useless extension candidates. Maximal degree in co-relation 9788. Up to 1410 conditions per place. [2024-06-27 17:51:39,289 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 167 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-27 17:51:39,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 198 transitions, 2204 flow [2024-06-27 17:51:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:51:39,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045584045584046 [2024-06-27 17:51:39,290 INFO L175 Difference]: Start difference. First operand has 191 places, 163 transitions, 1650 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:51:39,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 198 transitions, 2204 flow [2024-06-27 17:51:39,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 198 transitions, 2109 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:39,439 INFO L231 Difference]: Finished difference. Result has 193 places, 167 transitions, 1651 flow [2024-06-27 17:51:39,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=193, PETRI_TRANSITIONS=167} [2024-06-27 17:51:39,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 17:51:39,440 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 167 transitions, 1651 flow [2024-06-27 17:51:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:39,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:39,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:39,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 17:51:39,441 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:39,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:39,441 INFO L85 PathProgramCache]: Analyzing trace with hash -163972369, now seen corresponding path program 2 times [2024-06-27 17:51:39,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:39,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138694376] [2024-06-27 17:51:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138694376] [2024-06-27 17:51:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138694376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747353070] [2024-06-27 17:51:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:41,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:41,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 167 transitions, 1651 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:41,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:41,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:41,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:42,432 INFO L124 PetriNetUnfolderBase]: 987/1762 cut-off events. [2024-06-27 17:51:42,432 INFO L125 PetriNetUnfolderBase]: For 57640/57640 co-relation queries the response was YES. [2024-06-27 17:51:42,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10092 conditions, 1762 events. 987/1762 cut-off events. For 57640/57640 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9110 event pairs, 250 based on Foata normal form. 2/1686 useless extension candidates. Maximal degree in co-relation 9995. Up to 1515 conditions per place. [2024-06-27 17:51:42,451 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 167 selfloop transitions, 22 changer transitions 0/196 dead transitions. [2024-06-27 17:51:42,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 196 transitions, 2173 flow [2024-06-27 17:51:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 17:51:42,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396011396011396 [2024-06-27 17:51:42,468 INFO L175 Difference]: Start difference. First operand has 193 places, 167 transitions, 1651 flow. Second operand 9 states and 139 transitions. [2024-06-27 17:51:42,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 196 transitions, 2173 flow [2024-06-27 17:51:42,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 196 transitions, 2123 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:42,643 INFO L231 Difference]: Finished difference. Result has 196 places, 169 transitions, 1706 flow [2024-06-27 17:51:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1706, PETRI_PLACES=196, PETRI_TRANSITIONS=169} [2024-06-27 17:51:42,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 17:51:42,644 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 169 transitions, 1706 flow [2024-06-27 17:51:42,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:42,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:42,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:42,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 17:51:42,648 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:42,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 630808363, now seen corresponding path program 3 times [2024-06-27 17:51:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148153917] [2024-06-27 17:51:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148153917] [2024-06-27 17:51:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148153917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732503664] [2024-06-27 17:51:44,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:44,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:45,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:45,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 169 transitions, 1706 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:45,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:45,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:45,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:45,827 INFO L124 PetriNetUnfolderBase]: 1003/1791 cut-off events. [2024-06-27 17:51:45,827 INFO L125 PetriNetUnfolderBase]: For 60525/60525 co-relation queries the response was YES. [2024-06-27 17:51:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10324 conditions, 1791 events. 1003/1791 cut-off events. For 60525/60525 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9311 event pairs, 243 based on Foata normal form. 2/1714 useless extension candidates. Maximal degree in co-relation 10226. Up to 1535 conditions per place. [2024-06-27 17:51:45,840 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 172 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-27 17:51:45,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 201 transitions, 2260 flow [2024-06-27 17:51:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:51:45,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39886039886039887 [2024-06-27 17:51:45,842 INFO L175 Difference]: Start difference. First operand has 196 places, 169 transitions, 1706 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:51:45,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 201 transitions, 2260 flow [2024-06-27 17:51:46,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 201 transitions, 2171 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:46,017 INFO L231 Difference]: Finished difference. Result has 199 places, 173 transitions, 1745 flow [2024-06-27 17:51:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1745, PETRI_PLACES=199, PETRI_TRANSITIONS=173} [2024-06-27 17:51:46,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 17:51:46,020 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 173 transitions, 1745 flow [2024-06-27 17:51:46,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:46,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:46,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:46,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 17:51:46,020 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:46,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash 718609229, now seen corresponding path program 1 times [2024-06-27 17:51:46,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:46,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288692321] [2024-06-27 17:51:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288692321] [2024-06-27 17:51:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288692321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:47,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:51:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328235589] [2024-06-27 17:51:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:51:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:51:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:51:48,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:48,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 173 transitions, 1745 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:48,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:48,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:48,758 INFO L124 PetriNetUnfolderBase]: 1014/1808 cut-off events. [2024-06-27 17:51:48,758 INFO L125 PetriNetUnfolderBase]: For 62577/62577 co-relation queries the response was YES. [2024-06-27 17:51:48,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10471 conditions, 1808 events. 1014/1808 cut-off events. For 62577/62577 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9393 event pairs, 254 based on Foata normal form. 2/1729 useless extension candidates. Maximal degree in co-relation 10371. Up to 1552 conditions per place. [2024-06-27 17:51:48,771 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 172 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-27 17:51:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 203 transitions, 2261 flow [2024-06-27 17:51:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 17:51:48,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 17:51:48,772 INFO L175 Difference]: Start difference. First operand has 199 places, 173 transitions, 1745 flow. Second operand 10 states and 150 transitions. [2024-06-27 17:51:48,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 203 transitions, 2261 flow [2024-06-27 17:51:48,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 203 transitions, 2165 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:48,940 INFO L231 Difference]: Finished difference. Result has 203 places, 175 transitions, 1744 flow [2024-06-27 17:51:48,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1744, PETRI_PLACES=203, PETRI_TRANSITIONS=175} [2024-06-27 17:51:48,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 17:51:48,941 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 175 transitions, 1744 flow [2024-06-27 17:51:48,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:48,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:48,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:48,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 17:51:48,942 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:48,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:48,942 INFO L85 PathProgramCache]: Analyzing trace with hash 25365897, now seen corresponding path program 4 times [2024-06-27 17:51:48,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:48,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562061615] [2024-06-27 17:51:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:51,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:51,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562061615] [2024-06-27 17:51:51,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562061615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:51,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:51,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220248333] [2024-06-27 17:51:51,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:51,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:51,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 175 transitions, 1744 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:51,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:51,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:51,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:51,859 INFO L124 PetriNetUnfolderBase]: 1034/1849 cut-off events. [2024-06-27 17:51:51,860 INFO L125 PetriNetUnfolderBase]: For 63906/63906 co-relation queries the response was YES. [2024-06-27 17:51:51,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 1849 events. 1034/1849 cut-off events. For 63906/63906 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9692 event pairs, 246 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 10591. Up to 1556 conditions per place. [2024-06-27 17:51:51,873 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 171 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2024-06-27 17:51:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 203 transitions, 2280 flow [2024-06-27 17:51:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:51:51,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:51:51,878 INFO L175 Difference]: Start difference. First operand has 203 places, 175 transitions, 1744 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:51:51,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 203 transitions, 2280 flow [2024-06-27 17:51:52,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 203 transitions, 2205 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:52,060 INFO L231 Difference]: Finished difference. Result has 204 places, 176 transitions, 1743 flow [2024-06-27 17:51:52,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1743, PETRI_PLACES=204, PETRI_TRANSITIONS=176} [2024-06-27 17:51:52,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 17:51:52,060 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 176 transitions, 1743 flow [2024-06-27 17:51:52,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:52,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:52,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:52,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 17:51:52,061 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:52,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1808871817, now seen corresponding path program 2 times [2024-06-27 17:51:52,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:52,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056658717] [2024-06-27 17:51:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:52,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056658717] [2024-06-27 17:51:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056658717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108972346] [2024-06-27 17:51:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:54,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:54,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 176 transitions, 1743 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:54,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:54,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:54,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:55,402 INFO L124 PetriNetUnfolderBase]: 1045/1867 cut-off events. [2024-06-27 17:51:55,403 INFO L125 PetriNetUnfolderBase]: For 67023/67023 co-relation queries the response was YES. [2024-06-27 17:51:55,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10825 conditions, 1867 events. 1045/1867 cut-off events. For 67023/67023 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9839 event pairs, 241 based on Foata normal form. 2/1784 useless extension candidates. Maximal degree in co-relation 10723. Up to 1571 conditions per place. [2024-06-27 17:51:55,465 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 169 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-27 17:51:55,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 2253 flow [2024-06-27 17:51:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 17:51:55,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871794871794872 [2024-06-27 17:51:55,467 INFO L175 Difference]: Start difference. First operand has 204 places, 176 transitions, 1743 flow. Second operand 10 states and 151 transitions. [2024-06-27 17:51:55,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 2253 flow [2024-06-27 17:51:55,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 204 transitions, 2197 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 17:51:55,664 INFO L231 Difference]: Finished difference. Result has 207 places, 178 transitions, 1794 flow [2024-06-27 17:51:55,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1794, PETRI_PLACES=207, PETRI_TRANSITIONS=178} [2024-06-27 17:51:55,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 17:51:55,665 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 178 transitions, 1794 flow [2024-06-27 17:51:55,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:55,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:55,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 17:51:55,665 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:55,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 32792443, now seen corresponding path program 3 times [2024-06-27 17:51:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:55,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850674588] [2024-06-27 17:51:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:57,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850674588] [2024-06-27 17:51:57,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850674588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:57,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:51:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379305387] [2024-06-27 17:51:57,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:57,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:51:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:51:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:51:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:51:58,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 178 transitions, 1794 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:58,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:51:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:58,976 INFO L124 PetriNetUnfolderBase]: 1071/1907 cut-off events. [2024-06-27 17:51:58,976 INFO L125 PetriNetUnfolderBase]: For 73377/73377 co-relation queries the response was YES. [2024-06-27 17:51:58,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11282 conditions, 1907 events. 1071/1907 cut-off events. For 73377/73377 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10019 event pairs, 238 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 11179. Up to 1444 conditions per place. [2024-06-27 17:51:58,992 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 155 selfloop transitions, 50 changer transitions 0/212 dead transitions. [2024-06-27 17:51:58,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 212 transitions, 2512 flow [2024-06-27 17:51:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:51:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:51:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:51:58,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:51:58,993 INFO L175 Difference]: Start difference. First operand has 207 places, 178 transitions, 1794 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:51:58,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 212 transitions, 2512 flow [2024-06-27 17:51:59,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 212 transitions, 2425 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:59,181 INFO L231 Difference]: Finished difference. Result has 209 places, 182 transitions, 1909 flow [2024-06-27 17:51:59,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1909, PETRI_PLACES=209, PETRI_TRANSITIONS=182} [2024-06-27 17:51:59,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 17:51:59,181 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 182 transitions, 1909 flow [2024-06-27 17:51:59,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:59,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:59,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:59,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 17:51:59,182 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:51:59,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2107805040, now seen corresponding path program 1 times [2024-06-27 17:51:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:59,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722823434] [2024-06-27 17:51:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:59,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:01,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:01,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722823434] [2024-06-27 17:52:01,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722823434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:01,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:01,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752713238] [2024-06-27 17:52:01,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:01,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:01,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:01,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:01,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 182 transitions, 1909 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:01,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:01,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:01,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:02,324 INFO L124 PetriNetUnfolderBase]: 1069/1904 cut-off events. [2024-06-27 17:52:02,324 INFO L125 PetriNetUnfolderBase]: For 70542/70542 co-relation queries the response was YES. [2024-06-27 17:52:02,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11292 conditions, 1904 events. 1069/1904 cut-off events. For 70542/70542 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10057 event pairs, 289 based on Foata normal form. 1/1819 useless extension candidates. Maximal degree in co-relation 11188. Up to 1659 conditions per place. [2024-06-27 17:52:02,340 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 173 selfloop transitions, 30 changer transitions 0/210 dead transitions. [2024-06-27 17:52:02,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 210 transitions, 2461 flow [2024-06-27 17:52:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:02,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-27 17:52:02,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-27 17:52:02,341 INFO L175 Difference]: Start difference. First operand has 209 places, 182 transitions, 1909 flow. Second operand 10 states and 147 transitions. [2024-06-27 17:52:02,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 210 transitions, 2461 flow [2024-06-27 17:52:02,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 210 transitions, 2361 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:02,554 INFO L231 Difference]: Finished difference. Result has 213 places, 184 transitions, 1937 flow [2024-06-27 17:52:02,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1937, PETRI_PLACES=213, PETRI_TRANSITIONS=184} [2024-06-27 17:52:02,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 17:52:02,555 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 184 transitions, 1937 flow [2024-06-27 17:52:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 17:52:02,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:02,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 6724481, now seen corresponding path program 5 times [2024-06-27 17:52:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490160254] [2024-06-27 17:52:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:04,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490160254] [2024-06-27 17:52:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490160254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:04,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:04,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:04,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127460338] [2024-06-27 17:52:04,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:04,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:04,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 184 transitions, 1937 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:04,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:04,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:04,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:05,426 INFO L124 PetriNetUnfolderBase]: 1085/1932 cut-off events. [2024-06-27 17:52:05,426 INFO L125 PetriNetUnfolderBase]: For 74670/74670 co-relation queries the response was YES. [2024-06-27 17:52:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11503 conditions, 1932 events. 1085/1932 cut-off events. For 74670/74670 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10219 event pairs, 243 based on Foata normal form. 2/1848 useless extension candidates. Maximal degree in co-relation 11397. Up to 1636 conditions per place. [2024-06-27 17:52:05,440 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 181 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-27 17:52:05,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 214 transitions, 2523 flow [2024-06-27 17:52:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:52:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:52:05,441 INFO L175 Difference]: Start difference. First operand has 213 places, 184 transitions, 1937 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:52:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 214 transitions, 2523 flow [2024-06-27 17:52:05,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 214 transitions, 2419 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:05,665 INFO L231 Difference]: Finished difference. Result has 215 places, 188 transitions, 1985 flow [2024-06-27 17:52:05,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1985, PETRI_PLACES=215, PETRI_TRANSITIONS=188} [2024-06-27 17:52:05,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 17:52:05,666 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 188 transitions, 1985 flow [2024-06-27 17:52:05,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:05,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:05,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:05,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 17:52:05,666 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:05,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1420718373, now seen corresponding path program 4 times [2024-06-27 17:52:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:05,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121539050] [2024-06-27 17:52:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:05,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121539050] [2024-06-27 17:52:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121539050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:07,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241831292] [2024-06-27 17:52:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:07,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:07,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 188 transitions, 1985 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:07,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:07,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:07,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:08,899 INFO L124 PetriNetUnfolderBase]: 1096/1949 cut-off events. [2024-06-27 17:52:08,899 INFO L125 PetriNetUnfolderBase]: For 76698/76698 co-relation queries the response was YES. [2024-06-27 17:52:08,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11671 conditions, 1949 events. 1096/1949 cut-off events. For 76698/76698 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10333 event pairs, 246 based on Foata normal form. 2/1863 useless extension candidates. Maximal degree in co-relation 11563. Up to 1552 conditions per place. [2024-06-27 17:52:08,954 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 169 selfloop transitions, 42 changer transitions 0/218 dead transitions. [2024-06-27 17:52:08,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 218 transitions, 2533 flow [2024-06-27 17:52:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:52:08,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 17:52:08,955 INFO L175 Difference]: Start difference. First operand has 215 places, 188 transitions, 1985 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:52:08,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 218 transitions, 2533 flow [2024-06-27 17:52:09,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 218 transitions, 2413 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:09,158 INFO L231 Difference]: Finished difference. Result has 219 places, 190 transitions, 2002 flow [2024-06-27 17:52:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2002, PETRI_PLACES=219, PETRI_TRANSITIONS=190} [2024-06-27 17:52:09,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 17:52:09,158 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 190 transitions, 2002 flow [2024-06-27 17:52:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:09,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:09,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 17:52:09,159 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:09,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 14081711, now seen corresponding path program 6 times [2024-06-27 17:52:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36329950] [2024-06-27 17:52:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:11,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36329950] [2024-06-27 17:52:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36329950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:11,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:11,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:11,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119097737] [2024-06-27 17:52:11,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:11,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:11,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:11,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:11,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 190 transitions, 2002 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:11,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:11,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:11,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:12,434 INFO L124 PetriNetUnfolderBase]: 1112/1978 cut-off events. [2024-06-27 17:52:12,434 INFO L125 PetriNetUnfolderBase]: For 78601/78601 co-relation queries the response was YES. [2024-06-27 17:52:12,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11847 conditions, 1978 events. 1112/1978 cut-off events. For 78601/78601 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10504 event pairs, 254 based on Foata normal form. 2/1892 useless extension candidates. Maximal degree in co-relation 11738. Up to 1645 conditions per place. [2024-06-27 17:52:12,450 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 179 selfloop transitions, 32 changer transitions 0/218 dead transitions. [2024-06-27 17:52:12,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 218 transitions, 2578 flow [2024-06-27 17:52:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 17:52:12,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045584045584046 [2024-06-27 17:52:12,451 INFO L175 Difference]: Start difference. First operand has 219 places, 190 transitions, 2002 flow. Second operand 9 states and 142 transitions. [2024-06-27 17:52:12,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 218 transitions, 2578 flow [2024-06-27 17:52:12,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 218 transitions, 2465 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:12,679 INFO L231 Difference]: Finished difference. Result has 220 places, 192 transitions, 2028 flow [2024-06-27 17:52:12,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2028, PETRI_PLACES=220, PETRI_TRANSITIONS=192} [2024-06-27 17:52:12,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 17:52:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 192 transitions, 2028 flow [2024-06-27 17:52:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 17:52:12,680 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1420977843, now seen corresponding path program 5 times [2024-06-27 17:52:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924211370] [2024-06-27 17:52:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:14,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924211370] [2024-06-27 17:52:14,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924211370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:14,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:14,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790489598] [2024-06-27 17:52:14,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:14,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:14,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:15,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 192 transitions, 2028 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:15,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:15,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:15,890 INFO L124 PetriNetUnfolderBase]: 1108/1972 cut-off events. [2024-06-27 17:52:15,891 INFO L125 PetriNetUnfolderBase]: For 76364/76364 co-relation queries the response was YES. [2024-06-27 17:52:15,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11637 conditions, 1972 events. 1108/1972 cut-off events. For 76364/76364 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10498 event pairs, 250 based on Foata normal form. 2/1885 useless extension candidates. Maximal degree in co-relation 11527. Up to 1631 conditions per place. [2024-06-27 17:52:15,905 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 178 selfloop transitions, 34 changer transitions 0/219 dead transitions. [2024-06-27 17:52:15,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 219 transitions, 2530 flow [2024-06-27 17:52:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:52:15,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-06-27 17:52:15,907 INFO L175 Difference]: Start difference. First operand has 220 places, 192 transitions, 2028 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:52:15,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 219 transitions, 2530 flow [2024-06-27 17:52:16,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 219 transitions, 2387 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:16,110 INFO L231 Difference]: Finished difference. Result has 223 places, 192 transitions, 1958 flow [2024-06-27 17:52:16,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1958, PETRI_PLACES=223, PETRI_TRANSITIONS=192} [2024-06-27 17:52:16,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 17:52:16,111 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 192 transitions, 1958 flow [2024-06-27 17:52:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:16,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:16,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:16,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 17:52:16,111 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:16,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -132033963, now seen corresponding path program 1 times [2024-06-27 17:52:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:16,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525125376] [2024-06-27 17:52:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:16,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525125376] [2024-06-27 17:52:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525125376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:18,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435908222] [2024-06-27 17:52:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:18,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:18,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:18,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 192 transitions, 1958 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:18,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:18,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:19,507 INFO L124 PetriNetUnfolderBase]: 1140/2031 cut-off events. [2024-06-27 17:52:19,507 INFO L125 PetriNetUnfolderBase]: For 84466/84469 co-relation queries the response was YES. [2024-06-27 17:52:19,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11936 conditions, 2031 events. 1140/2031 cut-off events. For 84466/84469 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10934 event pairs, 297 based on Foata normal form. 6/1946 useless extension candidates. Maximal degree in co-relation 11825. Up to 1762 conditions per place. [2024-06-27 17:52:19,523 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 198 selfloop transitions, 23 changer transitions 0/228 dead transitions. [2024-06-27 17:52:19,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 228 transitions, 2616 flow [2024-06-27 17:52:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:52:19,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37995337995337997 [2024-06-27 17:52:19,534 INFO L175 Difference]: Start difference. First operand has 223 places, 192 transitions, 1958 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:52:19,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 228 transitions, 2616 flow [2024-06-27 17:52:19,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 228 transitions, 2517 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:19,763 INFO L231 Difference]: Finished difference. Result has 225 places, 194 transitions, 1998 flow [2024-06-27 17:52:19,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1998, PETRI_PLACES=225, PETRI_TRANSITIONS=194} [2024-06-27 17:52:19,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 17:52:19,765 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 194 transitions, 1998 flow [2024-06-27 17:52:19,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:19,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 17:52:19,766 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:19,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2022642441, now seen corresponding path program 7 times [2024-06-27 17:52:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478605415] [2024-06-27 17:52:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:22,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:22,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478605415] [2024-06-27 17:52:22,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478605415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:22,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:22,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:22,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623041444] [2024-06-27 17:52:22,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:22,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:22,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:22,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:22,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 194 transitions, 1998 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:22,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:22,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:22,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:23,362 INFO L124 PetriNetUnfolderBase]: 1156/2061 cut-off events. [2024-06-27 17:52:23,362 INFO L125 PetriNetUnfolderBase]: For 83660/83663 co-relation queries the response was YES. [2024-06-27 17:52:23,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12164 conditions, 2061 events. 1156/2061 cut-off events. For 83660/83663 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11128 event pairs, 235 based on Foata normal form. 2/1967 useless extension candidates. Maximal degree in co-relation 12052. Up to 1637 conditions per place. [2024-06-27 17:52:23,378 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 170 selfloop transitions, 44 changer transitions 0/221 dead transitions. [2024-06-27 17:52:23,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 221 transitions, 2584 flow [2024-06-27 17:52:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 17:52:23,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 17:52:23,380 INFO L175 Difference]: Start difference. First operand has 225 places, 194 transitions, 1998 flow. Second operand 9 states and 143 transitions. [2024-06-27 17:52:23,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 221 transitions, 2584 flow [2024-06-27 17:52:23,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 221 transitions, 2461 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 17:52:23,639 INFO L231 Difference]: Finished difference. Result has 225 places, 196 transitions, 2044 flow [2024-06-27 17:52:23,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2044, PETRI_PLACES=225, PETRI_TRANSITIONS=196} [2024-06-27 17:52:23,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 17:52:23,639 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 196 transitions, 2044 flow [2024-06-27 17:52:23,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:23,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:23,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:23,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 17:52:23,640 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:23,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -241789151, now seen corresponding path program 6 times [2024-06-27 17:52:23,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:23,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276417453] [2024-06-27 17:52:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276417453] [2024-06-27 17:52:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276417453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:26,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767690640] [2024-06-27 17:52:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:26,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:26,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 196 transitions, 2044 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:26,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:26,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:27,267 INFO L124 PetriNetUnfolderBase]: 1244/2193 cut-off events. [2024-06-27 17:52:27,268 INFO L125 PetriNetUnfolderBase]: For 110812/110815 co-relation queries the response was YES. [2024-06-27 17:52:27,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 2193 events. 1244/2193 cut-off events. For 110812/110815 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11898 event pairs, 224 based on Foata normal form. 4/2088 useless extension candidates. Maximal degree in co-relation 13598. Up to 1182 conditions per place. [2024-06-27 17:52:27,286 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 150 selfloop transitions, 81 changer transitions 0/238 dead transitions. [2024-06-27 17:52:27,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 238 transitions, 3248 flow [2024-06-27 17:52:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 17:52:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-27 17:52:27,287 INFO L175 Difference]: Start difference. First operand has 225 places, 196 transitions, 2044 flow. Second operand 10 states and 170 transitions. [2024-06-27 17:52:27,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 238 transitions, 3248 flow [2024-06-27 17:52:27,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 238 transitions, 3095 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:27,585 INFO L231 Difference]: Finished difference. Result has 229 places, 204 transitions, 2259 flow [2024-06-27 17:52:27,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2259, PETRI_PLACES=229, PETRI_TRANSITIONS=204} [2024-06-27 17:52:27,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 17:52:27,586 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 204 transitions, 2259 flow [2024-06-27 17:52:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:27,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:27,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 17:52:27,586 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:27,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1249541863, now seen corresponding path program 7 times [2024-06-27 17:52:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:27,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156175432] [2024-06-27 17:52:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:27,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:30,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:30,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156175432] [2024-06-27 17:52:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156175432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:30,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:30,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:30,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619662635] [2024-06-27 17:52:30,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:30,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:30,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 204 transitions, 2259 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:30,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:31,195 INFO L124 PetriNetUnfolderBase]: 1270/2233 cut-off events. [2024-06-27 17:52:31,196 INFO L125 PetriNetUnfolderBase]: For 114283/114286 co-relation queries the response was YES. [2024-06-27 17:52:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14455 conditions, 2233 events. 1270/2233 cut-off events. For 114283/114286 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12115 event pairs, 263 based on Foata normal form. 2/2124 useless extension candidates. Maximal degree in co-relation 14340. Up to 1809 conditions per place. [2024-06-27 17:52:31,215 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 189 selfloop transitions, 42 changer transitions 0/238 dead transitions. [2024-06-27 17:52:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 238 transitions, 3065 flow [2024-06-27 17:52:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:52:31,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-27 17:52:31,216 INFO L175 Difference]: Start difference. First operand has 229 places, 204 transitions, 2259 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:52:31,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 238 transitions, 3065 flow [2024-06-27 17:52:31,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 238 transitions, 2835 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:31,544 INFO L231 Difference]: Finished difference. Result has 233 places, 208 transitions, 2234 flow [2024-06-27 17:52:31,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2234, PETRI_PLACES=233, PETRI_TRANSITIONS=208} [2024-06-27 17:52:31,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 17:52:31,544 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 208 transitions, 2234 flow [2024-06-27 17:52:31,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:31,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:31,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 17:52:31,545 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:31,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -676639365, now seen corresponding path program 8 times [2024-06-27 17:52:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100986377] [2024-06-27 17:52:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100986377] [2024-06-27 17:52:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100986377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928251818] [2024-06-27 17:52:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:33,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:34,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:34,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 208 transitions, 2234 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:34,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:34,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:34,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:34,998 INFO L124 PetriNetUnfolderBase]: 1279/2244 cut-off events. [2024-06-27 17:52:34,999 INFO L125 PetriNetUnfolderBase]: For 115712/115712 co-relation queries the response was YES. [2024-06-27 17:52:35,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14064 conditions, 2244 events. 1279/2244 cut-off events. For 115712/115712 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12163 event pairs, 345 based on Foata normal form. 4/2139 useless extension candidates. Maximal degree in co-relation 13949. Up to 2023 conditions per place. [2024-06-27 17:52:35,018 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 202 selfloop transitions, 23 changer transitions 0/232 dead transitions. [2024-06-27 17:52:35,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 232 transitions, 2942 flow [2024-06-27 17:52:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-27 17:52:35,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37948717948717947 [2024-06-27 17:52:35,020 INFO L175 Difference]: Start difference. First operand has 233 places, 208 transitions, 2234 flow. Second operand 10 states and 148 transitions. [2024-06-27 17:52:35,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 232 transitions, 2942 flow [2024-06-27 17:52:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 232 transitions, 2803 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:35,317 INFO L231 Difference]: Finished difference. Result has 238 places, 210 transitions, 2207 flow [2024-06-27 17:52:35,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2207, PETRI_PLACES=238, PETRI_TRANSITIONS=210} [2024-06-27 17:52:35,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 17:52:35,318 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 210 transitions, 2207 flow [2024-06-27 17:52:35,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:35,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:35,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 17:52:35,319 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1249818569, now seen corresponding path program 8 times [2024-06-27 17:52:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:35,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581928392] [2024-06-27 17:52:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:35,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:37,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581928392] [2024-06-27 17:52:37,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581928392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:37,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:37,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:37,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799307716] [2024-06-27 17:52:37,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:37,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:37,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:37,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:37,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 210 transitions, 2207 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:37,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:37,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:37,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:38,614 INFO L124 PetriNetUnfolderBase]: 1299/2289 cut-off events. [2024-06-27 17:52:38,614 INFO L125 PetriNetUnfolderBase]: For 113259/113262 co-relation queries the response was YES. [2024-06-27 17:52:38,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14276 conditions, 2289 events. 1299/2289 cut-off events. For 113259/113262 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12474 event pairs, 270 based on Foata normal form. 2/2175 useless extension candidates. Maximal degree in co-relation 14158. Up to 1934 conditions per place. [2024-06-27 17:52:38,632 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 201 selfloop transitions, 31 changer transitions 0/239 dead transitions. [2024-06-27 17:52:38,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 239 transitions, 2837 flow [2024-06-27 17:52:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 17:52:38,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-06-27 17:52:38,634 INFO L175 Difference]: Start difference. First operand has 238 places, 210 transitions, 2207 flow. Second operand 9 states and 145 transitions. [2024-06-27 17:52:38,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 239 transitions, 2837 flow [2024-06-27 17:52:38,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 239 transitions, 2780 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:38,942 INFO L231 Difference]: Finished difference. Result has 239 places, 211 transitions, 2244 flow [2024-06-27 17:52:38,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=239, PETRI_TRANSITIONS=211} [2024-06-27 17:52:38,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 17:52:38,949 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 211 transitions, 2244 flow [2024-06-27 17:52:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:38,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:38,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 17:52:38,951 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:38,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash 956309867, now seen corresponding path program 9 times [2024-06-27 17:52:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406654281] [2024-06-27 17:52:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406654281] [2024-06-27 17:52:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406654281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:41,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:41,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:41,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931074288] [2024-06-27 17:52:41,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:41,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:41,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:41,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:41,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:41,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:41,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 211 transitions, 2244 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:41,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:41,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:41,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:42,272 INFO L124 PetriNetUnfolderBase]: 1310/2305 cut-off events. [2024-06-27 17:52:42,273 INFO L125 PetriNetUnfolderBase]: For 116449/116452 co-relation queries the response was YES. [2024-06-27 17:52:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14494 conditions, 2305 events. 1310/2305 cut-off events. For 116449/116452 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12602 event pairs, 275 based on Foata normal form. 2/2190 useless extension candidates. Maximal degree in co-relation 14375. Up to 1913 conditions per place. [2024-06-27 17:52:42,294 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 195 selfloop transitions, 39 changer transitions 0/241 dead transitions. [2024-06-27 17:52:42,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 241 transitions, 2840 flow [2024-06-27 17:52:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:52:42,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025641025641026 [2024-06-27 17:52:42,295 INFO L175 Difference]: Start difference. First operand has 239 places, 211 transitions, 2244 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:52:42,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 241 transitions, 2840 flow [2024-06-27 17:52:42,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 241 transitions, 2770 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:42,639 INFO L231 Difference]: Finished difference. Result has 242 places, 213 transitions, 2307 flow [2024-06-27 17:52:42,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=242, PETRI_TRANSITIONS=213} [2024-06-27 17:52:42,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 17:52:42,640 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 213 transitions, 2307 flow [2024-06-27 17:52:42,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:42,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:42,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 17:52:42,640 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:42,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 142770313, now seen corresponding path program 2 times [2024-06-27 17:52:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:42,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863999102] [2024-06-27 17:52:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863999102] [2024-06-27 17:52:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863999102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:45,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497922457] [2024-06-27 17:52:45,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:45,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:45,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:45,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 213 transitions, 2307 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:45,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:45,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:45,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:46,167 INFO L124 PetriNetUnfolderBase]: 1380/2440 cut-off events. [2024-06-27 17:52:46,168 INFO L125 PetriNetUnfolderBase]: For 142284/142284 co-relation queries the response was YES. [2024-06-27 17:52:46,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15844 conditions, 2440 events. 1380/2440 cut-off events. For 142284/142284 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13566 event pairs, 356 based on Foata normal form. 4/2331 useless extension candidates. Maximal degree in co-relation 15724. Up to 2103 conditions per place. [2024-06-27 17:52:46,190 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 216 selfloop transitions, 24 changer transitions 0/247 dead transitions. [2024-06-27 17:52:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 247 transitions, 3235 flow [2024-06-27 17:52:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:52:46,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822843822843823 [2024-06-27 17:52:46,192 INFO L175 Difference]: Start difference. First operand has 242 places, 213 transitions, 2307 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:52:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 247 transitions, 3235 flow [2024-06-27 17:52:46,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 247 transitions, 3126 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:46,548 INFO L231 Difference]: Finished difference. Result has 245 places, 217 transitions, 2435 flow [2024-06-27 17:52:46,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2435, PETRI_PLACES=245, PETRI_TRANSITIONS=217} [2024-06-27 17:52:46,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 17:52:46,549 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 217 transitions, 2435 flow [2024-06-27 17:52:46,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:46,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:46,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:46,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 17:52:46,549 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:46,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1951582817, now seen corresponding path program 9 times [2024-06-27 17:52:46,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:46,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321611848] [2024-06-27 17:52:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:46,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:48,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:48,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321611848] [2024-06-27 17:52:48,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321611848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:48,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:48,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:52:48,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430879386] [2024-06-27 17:52:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:52:48,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:52:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:52:48,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:48,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 217 transitions, 2435 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:48,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:48,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:48,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:49,765 INFO L124 PetriNetUnfolderBase]: 1396/2458 cut-off events. [2024-06-27 17:52:49,765 INFO L125 PetriNetUnfolderBase]: For 142141/142144 co-relation queries the response was YES. [2024-06-27 17:52:49,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16072 conditions, 2458 events. 1396/2458 cut-off events. For 142141/142144 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13658 event pairs, 324 based on Foata normal form. 2/2341 useless extension candidates. Maximal degree in co-relation 15951. Up to 2130 conditions per place. [2024-06-27 17:52:49,786 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 207 selfloop transitions, 29 changer transitions 0/243 dead transitions. [2024-06-27 17:52:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 243 transitions, 3069 flow [2024-06-27 17:52:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:52:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:52:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 17:52:49,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39886039886039887 [2024-06-27 17:52:49,787 INFO L175 Difference]: Start difference. First operand has 245 places, 217 transitions, 2435 flow. Second operand 9 states and 140 transitions. [2024-06-27 17:52:49,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 243 transitions, 3069 flow [2024-06-27 17:52:50,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 243 transitions, 2941 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 17:52:50,158 INFO L231 Difference]: Finished difference. Result has 248 places, 219 transitions, 2454 flow [2024-06-27 17:52:50,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2454, PETRI_PLACES=248, PETRI_TRANSITIONS=219} [2024-06-27 17:52:50,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 17:52:50,159 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 219 transitions, 2454 flow [2024-06-27 17:52:50,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:50,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:50,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:50,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 17:52:50,160 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:50,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash 956050397, now seen corresponding path program 10 times [2024-06-27 17:52:50,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:50,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114213062] [2024-06-27 17:52:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:52,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114213062] [2024-06-27 17:52:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114213062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:52,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:52,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:52,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542455734] [2024-06-27 17:52:52,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:52,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:52,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:52,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:52,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:52,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:52,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 219 transitions, 2454 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:52,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:52,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:52,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:53,862 INFO L124 PetriNetUnfolderBase]: 1407/2475 cut-off events. [2024-06-27 17:52:53,862 INFO L125 PetriNetUnfolderBase]: For 141586/141589 co-relation queries the response was YES. [2024-06-27 17:52:53,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16000 conditions, 2475 events. 1407/2475 cut-off events. For 141586/141589 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13798 event pairs, 317 based on Foata normal form. 2/2356 useless extension candidates. Maximal degree in co-relation 15877. Up to 2116 conditions per place. [2024-06-27 17:52:53,881 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 207 selfloop transitions, 34 changer transitions 0/248 dead transitions. [2024-06-27 17:52:53,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 248 transitions, 3064 flow [2024-06-27 17:52:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:52:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:52:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:52:53,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 17:52:53,882 INFO L175 Difference]: Start difference. First operand has 248 places, 219 transitions, 2454 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:52:53,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 248 transitions, 3064 flow [2024-06-27 17:52:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 248 transitions, 2933 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:52:54,242 INFO L231 Difference]: Finished difference. Result has 251 places, 221 transitions, 2450 flow [2024-06-27 17:52:54,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2450, PETRI_PLACES=251, PETRI_TRANSITIONS=221} [2024-06-27 17:52:54,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-27 17:52:54,243 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 221 transitions, 2450 flow [2024-06-27 17:52:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:54,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:54,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 17:52:54,243 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:54,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -557658475, now seen corresponding path program 3 times [2024-06-27 17:52:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:54,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334820938] [2024-06-27 17:52:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:52:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:52:57,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:52:57,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334820938] [2024-06-27 17:52:57,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334820938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:52:57,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:52:57,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:52:57,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771662762] [2024-06-27 17:52:57,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:52:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:52:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:52:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:52:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:52:57,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:52:57,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 221 transitions, 2450 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:57,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:52:57,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:52:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:52:58,392 INFO L124 PetriNetUnfolderBase]: 1439/2531 cut-off events. [2024-06-27 17:52:58,392 INFO L125 PetriNetUnfolderBase]: For 151168/151168 co-relation queries the response was YES. [2024-06-27 17:52:58,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16282 conditions, 2531 events. 1439/2531 cut-off events. For 151168/151168 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14224 event pairs, 407 based on Foata normal form. 4/2419 useless extension candidates. Maximal degree in co-relation 16158. Up to 2305 conditions per place. [2024-06-27 17:52:58,417 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 223 selfloop transitions, 18 changer transitions 0/248 dead transitions. [2024-06-27 17:52:58,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 248 transitions, 3096 flow [2024-06-27 17:52:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:52:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:52:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-06-27 17:52:58,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-27 17:52:58,419 INFO L175 Difference]: Start difference. First operand has 251 places, 221 transitions, 2450 flow. Second operand 11 states and 156 transitions. [2024-06-27 17:52:58,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 248 transitions, 3096 flow [2024-06-27 17:52:58,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 248 transitions, 2993 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 17:52:58,828 INFO L231 Difference]: Finished difference. Result has 254 places, 223 transitions, 2466 flow [2024-06-27 17:52:58,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2466, PETRI_PLACES=254, PETRI_TRANSITIONS=223} [2024-06-27 17:52:58,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-27 17:52:58,829 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 223 transitions, 2466 flow [2024-06-27 17:52:58,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:52:58,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:52:58,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:52:58,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 17:52:58,830 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:52:58,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:52:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash 261588923, now seen corresponding path program 10 times [2024-06-27 17:52:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:52:58,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090139326] [2024-06-27 17:52:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:52:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:52:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090139326] [2024-06-27 17:53:01,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090139326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:01,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:53:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143443403] [2024-06-27 17:53:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:53:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:53:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:53:01,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:01,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 223 transitions, 2466 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:01,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:01,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:01,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:02,084 INFO L124 PetriNetUnfolderBase]: 1439/2533 cut-off events. [2024-06-27 17:53:02,084 INFO L125 PetriNetUnfolderBase]: For 142074/142077 co-relation queries the response was YES. [2024-06-27 17:53:02,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16076 conditions, 2533 events. 1439/2533 cut-off events. For 142074/142077 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14236 event pairs, 330 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 15951. Up to 2195 conditions per place. [2024-06-27 17:53:02,109 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-27 17:53:02,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 252 transitions, 3144 flow [2024-06-27 17:53:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:53:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:53:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 17:53:02,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:53:02,111 INFO L175 Difference]: Start difference. First operand has 254 places, 223 transitions, 2466 flow. Second operand 9 states and 141 transitions. [2024-06-27 17:53:02,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 252 transitions, 3144 flow [2024-06-27 17:53:02,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 252 transitions, 3045 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:02,552 INFO L231 Difference]: Finished difference. Result has 255 places, 227 transitions, 2541 flow [2024-06-27 17:53:02,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2541, PETRI_PLACES=255, PETRI_TRANSITIONS=227} [2024-06-27 17:53:02,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 17:53:02,553 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 227 transitions, 2541 flow [2024-06-27 17:53:02,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:02,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:02,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:02,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 17:53:02,553 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:02,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash 142324843, now seen corresponding path program 4 times [2024-06-27 17:53:02,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:02,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727601590] [2024-06-27 17:53:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727601590] [2024-06-27 17:53:05,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727601590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:05,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658618215] [2024-06-27 17:53:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:05,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:05,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:05,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:05,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 227 transitions, 2541 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:05,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:05,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:05,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:06,368 INFO L124 PetriNetUnfolderBase]: 1433/2520 cut-off events. [2024-06-27 17:53:06,368 INFO L125 PetriNetUnfolderBase]: For 137865/137865 co-relation queries the response was YES. [2024-06-27 17:53:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15697 conditions, 2520 events. 1433/2520 cut-off events. For 137865/137865 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14172 event pairs, 399 based on Foata normal form. 4/2408 useless extension candidates. Maximal degree in co-relation 15570. Up to 2280 conditions per place. [2024-06-27 17:53:06,393 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 225 selfloop transitions, 21 changer transitions 0/253 dead transitions. [2024-06-27 17:53:06,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 253 transitions, 3129 flow [2024-06-27 17:53:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-27 17:53:06,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-06-27 17:53:06,394 INFO L175 Difference]: Start difference. First operand has 255 places, 227 transitions, 2541 flow. Second operand 11 states and 159 transitions. [2024-06-27 17:53:06,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 253 transitions, 3129 flow [2024-06-27 17:53:06,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 253 transitions, 2923 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:06,835 INFO L231 Difference]: Finished difference. Result has 260 places, 227 transitions, 2382 flow [2024-06-27 17:53:06,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2382, PETRI_PLACES=260, PETRI_TRANSITIONS=227} [2024-06-27 17:53:06,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 17:53:06,836 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 227 transitions, 2382 flow [2024-06-27 17:53:06,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:06,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:06,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:06,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 17:53:06,837 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:06,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash -928894759, now seen corresponding path program 11 times [2024-06-27 17:53:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:06,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162017118] [2024-06-27 17:53:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:06,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:09,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:09,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162017118] [2024-06-27 17:53:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162017118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:09,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:09,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317218965] [2024-06-27 17:53:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:09,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:09,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 227 transitions, 2382 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:09,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:09,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:09,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:10,608 INFO L124 PetriNetUnfolderBase]: 1429/2517 cut-off events. [2024-06-27 17:53:10,609 INFO L125 PetriNetUnfolderBase]: For 122929/122932 co-relation queries the response was YES. [2024-06-27 17:53:10,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 2517 events. 1429/2517 cut-off events. For 122929/122932 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14090 event pairs, 295 based on Foata normal form. 2/2396 useless extension candidates. Maximal degree in co-relation 14923. Up to 1907 conditions per place. [2024-06-27 17:53:10,632 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 179 selfloop transitions, 70 changer transitions 0/256 dead transitions. [2024-06-27 17:53:10,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 256 transitions, 3010 flow [2024-06-27 17:53:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:53:10,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025641025641026 [2024-06-27 17:53:10,633 INFO L175 Difference]: Start difference. First operand has 260 places, 227 transitions, 2382 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:53:10,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 256 transitions, 3010 flow [2024-06-27 17:53:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 256 transitions, 2946 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 17:53:11,107 INFO L231 Difference]: Finished difference. Result has 259 places, 229 transitions, 2517 flow [2024-06-27 17:53:11,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2517, PETRI_PLACES=259, PETRI_TRANSITIONS=229} [2024-06-27 17:53:11,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 17:53:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 229 transitions, 2517 flow [2024-06-27 17:53:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:11,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:11,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 17:53:11,108 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:11,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2087594745, now seen corresponding path program 12 times [2024-06-27 17:53:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:11,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768898450] [2024-06-27 17:53:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:13,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:13,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768898450] [2024-06-27 17:53:13,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768898450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:13,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:13,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:53:13,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602211706] [2024-06-27 17:53:13,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:13,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:53:13,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:53:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:53:13,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:13,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 229 transitions, 2517 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:13,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:13,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:13,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:14,727 INFO L124 PetriNetUnfolderBase]: 1440/2534 cut-off events. [2024-06-27 17:53:14,727 INFO L125 PetriNetUnfolderBase]: For 126574/126577 co-relation queries the response was YES. [2024-06-27 17:53:14,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15491 conditions, 2534 events. 1440/2534 cut-off events. For 126574/126577 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14211 event pairs, 309 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 15362. Up to 2036 conditions per place. [2024-06-27 17:53:14,751 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 204 selfloop transitions, 52 changer transitions 0/263 dead transitions. [2024-06-27 17:53:14,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 263 transitions, 3399 flow [2024-06-27 17:53:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 17:53:14,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128205128205128 [2024-06-27 17:53:14,753 INFO L175 Difference]: Start difference. First operand has 259 places, 229 transitions, 2517 flow. Second operand 10 states and 161 transitions. [2024-06-27 17:53:14,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 263 transitions, 3399 flow [2024-06-27 17:53:15,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 263 transitions, 3220 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:15,281 INFO L231 Difference]: Finished difference. Result has 261 places, 233 transitions, 2567 flow [2024-06-27 17:53:15,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2567, PETRI_PLACES=261, PETRI_TRANSITIONS=233} [2024-06-27 17:53:15,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 17:53:15,282 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 233 transitions, 2567 flow [2024-06-27 17:53:15,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:15,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:15,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:15,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 17:53:15,283 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:15,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 261804249, now seen corresponding path program 13 times [2024-06-27 17:53:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:15,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826454743] [2024-06-27 17:53:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826454743] [2024-06-27 17:53:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826454743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:17,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:17,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798951912] [2024-06-27 17:53:17,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:17,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:17,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:17,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 233 transitions, 2567 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:17,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:17,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:17,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:18,856 INFO L124 PetriNetUnfolderBase]: 1436/2528 cut-off events. [2024-06-27 17:53:18,856 INFO L125 PetriNetUnfolderBase]: For 121750/121753 co-relation queries the response was YES. [2024-06-27 17:53:18,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15149 conditions, 2528 events. 1436/2528 cut-off events. For 121750/121753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14188 event pairs, 337 based on Foata normal form. 2/2406 useless extension candidates. Maximal degree in co-relation 15019. Up to 2190 conditions per place. [2024-06-27 17:53:18,875 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 220 selfloop transitions, 31 changer transitions 0/258 dead transitions. [2024-06-27 17:53:18,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 258 transitions, 3141 flow [2024-06-27 17:53:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 17:53:18,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871794871794872 [2024-06-27 17:53:18,877 INFO L175 Difference]: Start difference. First operand has 261 places, 233 transitions, 2567 flow. Second operand 10 states and 151 transitions. [2024-06-27 17:53:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 258 transitions, 3141 flow [2024-06-27 17:53:19,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 258 transitions, 2980 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:19,398 INFO L231 Difference]: Finished difference. Result has 265 places, 233 transitions, 2473 flow [2024-06-27 17:53:19,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2473, PETRI_PLACES=265, PETRI_TRANSITIONS=233} [2024-06-27 17:53:19,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 17:53:19,399 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 233 transitions, 2473 flow [2024-06-27 17:53:19,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:19,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:19,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 17:53:19,400 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:19,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash 527839863, now seen corresponding path program 5 times [2024-06-27 17:53:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:19,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581102696] [2024-06-27 17:53:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581102696] [2024-06-27 17:53:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581102696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:22,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:22,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697337687] [2024-06-27 17:53:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:22,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:22,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 233 transitions, 2473 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:22,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:22,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:22,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:23,225 INFO L124 PetriNetUnfolderBase]: 1468/2587 cut-off events. [2024-06-27 17:53:23,225 INFO L125 PetriNetUnfolderBase]: For 133479/133482 co-relation queries the response was YES. [2024-06-27 17:53:23,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15501 conditions, 2587 events. 1468/2587 cut-off events. For 133479/133482 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14677 event pairs, 383 based on Foata normal form. 6/2470 useless extension candidates. Maximal degree in co-relation 15369. Up to 2279 conditions per place. [2024-06-27 17:53:23,249 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 232 selfloop transitions, 27 changer transitions 0/266 dead transitions. [2024-06-27 17:53:23,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 266 transitions, 3209 flow [2024-06-27 17:53:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:53:23,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37995337995337997 [2024-06-27 17:53:23,251 INFO L175 Difference]: Start difference. First operand has 265 places, 233 transitions, 2473 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:53:23,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 266 transitions, 3209 flow [2024-06-27 17:53:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 266 transitions, 3126 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:23,709 INFO L231 Difference]: Finished difference. Result has 267 places, 235 transitions, 2551 flow [2024-06-27 17:53:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2551, PETRI_PLACES=267, PETRI_TRANSITIONS=235} [2024-06-27 17:53:23,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 17:53:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 235 transitions, 2551 flow [2024-06-27 17:53:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:23,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 17:53:23,710 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash -241460117, now seen corresponding path program 6 times [2024-06-27 17:53:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41958165] [2024-06-27 17:53:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:26,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41958165] [2024-06-27 17:53:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41958165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:26,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030255930] [2024-06-27 17:53:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:26,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:27,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:27,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 235 transitions, 2551 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:27,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:27,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:27,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:28,109 INFO L124 PetriNetUnfolderBase]: 1500/2645 cut-off events. [2024-06-27 17:53:28,110 INFO L125 PetriNetUnfolderBase]: For 141480/141483 co-relation queries the response was YES. [2024-06-27 17:53:28,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16047 conditions, 2645 events. 1500/2645 cut-off events. For 141480/141483 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15126 event pairs, 357 based on Foata normal form. 6/2526 useless extension candidates. Maximal degree in co-relation 15914. Up to 2197 conditions per place. [2024-06-27 17:53:28,133 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 211 selfloop transitions, 50 changer transitions 0/268 dead transitions. [2024-06-27 17:53:28,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 268 transitions, 3295 flow [2024-06-27 17:53:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 17:53:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38927738927738925 [2024-06-27 17:53:28,135 INFO L175 Difference]: Start difference. First operand has 267 places, 235 transitions, 2551 flow. Second operand 11 states and 167 transitions. [2024-06-27 17:53:28,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 268 transitions, 3295 flow [2024-06-27 17:53:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 268 transitions, 3150 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:28,586 INFO L231 Difference]: Finished difference. Result has 269 places, 237 transitions, 2617 flow [2024-06-27 17:53:28,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2617, PETRI_PLACES=269, PETRI_TRANSITIONS=237} [2024-06-27 17:53:28,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-27 17:53:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 237 transitions, 2617 flow [2024-06-27 17:53:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:28,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:28,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 17:53:28,587 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:28,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2022909847, now seen corresponding path program 14 times [2024-06-27 17:53:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:28,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258508530] [2024-06-27 17:53:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:28,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258508530] [2024-06-27 17:53:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258508530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:31,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:31,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:53:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051712810] [2024-06-27 17:53:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:53:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:53:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:53:31,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:31,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 237 transitions, 2617 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:31,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:31,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:31,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:32,267 INFO L124 PetriNetUnfolderBase]: 1511/2661 cut-off events. [2024-06-27 17:53:32,267 INFO L125 PetriNetUnfolderBase]: For 134365/134368 co-relation queries the response was YES. [2024-06-27 17:53:32,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16032 conditions, 2661 events. 1511/2661 cut-off events. For 134365/134368 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15180 event pairs, 329 based on Foata normal form. 2/2534 useless extension candidates. Maximal degree in co-relation 15898. Up to 2191 conditions per place. [2024-06-27 17:53:32,293 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 211 selfloop transitions, 49 changer transitions 0/267 dead transitions. [2024-06-27 17:53:32,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 267 transitions, 3267 flow [2024-06-27 17:53:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:53:32,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:53:32,294 INFO L175 Difference]: Start difference. First operand has 269 places, 237 transitions, 2617 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:53:32,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 267 transitions, 3267 flow [2024-06-27 17:53:32,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 267 transitions, 3072 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:32,803 INFO L231 Difference]: Finished difference. Result has 270 places, 239 transitions, 2577 flow [2024-06-27 17:53:32,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2577, PETRI_PLACES=270, PETRI_TRANSITIONS=239} [2024-06-27 17:53:32,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 17:53:32,804 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 239 transitions, 2577 flow [2024-06-27 17:53:32,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:32,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:32,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:32,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 17:53:32,805 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:32,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2032185481, now seen corresponding path program 7 times [2024-06-27 17:53:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303099057] [2024-06-27 17:53:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:36,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303099057] [2024-06-27 17:53:36,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303099057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:36,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:36,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989954459] [2024-06-27 17:53:36,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 239 transitions, 2577 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:36,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:37,465 INFO L124 PetriNetUnfolderBase]: 1524/2686 cut-off events. [2024-06-27 17:53:37,465 INFO L125 PetriNetUnfolderBase]: For 136448/136451 co-relation queries the response was YES. [2024-06-27 17:53:37,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15965 conditions, 2686 events. 1524/2686 cut-off events. For 136448/136451 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15402 event pairs, 394 based on Foata normal form. 6/2565 useless extension candidates. Maximal degree in co-relation 15830. Up to 2342 conditions per place. [2024-06-27 17:53:37,489 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 231 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-27 17:53:37,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 272 transitions, 3333 flow [2024-06-27 17:53:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:53:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:53:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:53:37,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822843822843823 [2024-06-27 17:53:37,491 INFO L175 Difference]: Start difference. First operand has 270 places, 239 transitions, 2577 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:53:37,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 272 transitions, 3333 flow [2024-06-27 17:53:38,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 272 transitions, 3202 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:38,023 INFO L231 Difference]: Finished difference. Result has 273 places, 241 transitions, 2629 flow [2024-06-27 17:53:38,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2446, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2629, PETRI_PLACES=273, PETRI_TRANSITIONS=241} [2024-06-27 17:53:38,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 17:53:38,024 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 241 transitions, 2629 flow [2024-06-27 17:53:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:38,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:38,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 17:53:38,024 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:38,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2022650377, now seen corresponding path program 15 times [2024-06-27 17:53:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:38,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899403359] [2024-06-27 17:53:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899403359] [2024-06-27 17:53:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899403359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:53:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402863607] [2024-06-27 17:53:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:53:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:53:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:53:40,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:40,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 241 transitions, 2629 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:40,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:40,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:40,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:41,744 INFO L124 PetriNetUnfolderBase]: 1520/2679 cut-off events. [2024-06-27 17:53:41,744 INFO L125 PetriNetUnfolderBase]: For 123815/123818 co-relation queries the response was YES. [2024-06-27 17:53:41,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15653 conditions, 2679 events. 1520/2679 cut-off events. For 123815/123818 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15303 event pairs, 333 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 15517. Up to 2231 conditions per place. [2024-06-27 17:53:41,770 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 214 selfloop transitions, 46 changer transitions 0/267 dead transitions. [2024-06-27 17:53:41,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 267 transitions, 3225 flow [2024-06-27 17:53:41,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 17:53:41,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2024-06-27 17:53:41,772 INFO L175 Difference]: Start difference. First operand has 273 places, 241 transitions, 2629 flow. Second operand 10 states and 154 transitions. [2024-06-27 17:53:41,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 267 transitions, 3225 flow [2024-06-27 17:53:42,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 267 transitions, 3026 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:42,319 INFO L231 Difference]: Finished difference. Result has 274 places, 241 transitions, 2527 flow [2024-06-27 17:53:42,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2527, PETRI_PLACES=274, PETRI_TRANSITIONS=241} [2024-06-27 17:53:42,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 17:53:42,320 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 241 transitions, 2527 flow [2024-06-27 17:53:42,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:42,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:42,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:42,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 17:53:42,320 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:42,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash 998038335, now seen corresponding path program 1 times [2024-06-27 17:53:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90117685] [2024-06-27 17:53:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:44,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90117685] [2024-06-27 17:53:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90117685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:44,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:44,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:53:44,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895649229] [2024-06-27 17:53:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:44,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:53:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:53:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:53:44,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:44,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 241 transitions, 2527 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:44,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:44,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:44,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:45,908 INFO L124 PetriNetUnfolderBase]: 1536/2707 cut-off events. [2024-06-27 17:53:45,908 INFO L125 PetriNetUnfolderBase]: For 121800/121800 co-relation queries the response was YES. [2024-06-27 17:53:45,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15549 conditions, 2707 events. 1536/2707 cut-off events. For 121800/121800 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15571 event pairs, 318 based on Foata normal form. 2/2593 useless extension candidates. Maximal degree in co-relation 15412. Up to 2334 conditions per place. [2024-06-27 17:53:45,933 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 245 selfloop transitions, 27 changer transitions 0/279 dead transitions. [2024-06-27 17:53:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 279 transitions, 3361 flow [2024-06-27 17:53:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:53:45,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:53:45,935 INFO L175 Difference]: Start difference. First operand has 274 places, 241 transitions, 2527 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:53:45,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 279 transitions, 3361 flow [2024-06-27 17:53:46,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 279 transitions, 3255 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 17:53:46,442 INFO L231 Difference]: Finished difference. Result has 276 places, 245 transitions, 2642 flow [2024-06-27 17:53:46,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2642, PETRI_PLACES=276, PETRI_TRANSITIONS=245} [2024-06-27 17:53:46,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 17:53:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 245 transitions, 2642 flow [2024-06-27 17:53:46,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:46,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:46,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:46,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 17:53:46,443 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:46,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:46,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1919595829, now seen corresponding path program 2 times [2024-06-27 17:53:46,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:46,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429833893] [2024-06-27 17:53:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:46,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:48,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429833893] [2024-06-27 17:53:48,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429833893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:48,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:48,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:48,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801802941] [2024-06-27 17:53:48,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:48,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:49,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:49,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 245 transitions, 2642 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:49,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:49,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:49,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:49,963 INFO L124 PetriNetUnfolderBase]: 1556/2749 cut-off events. [2024-06-27 17:53:49,963 INFO L125 PetriNetUnfolderBase]: For 126695/126695 co-relation queries the response was YES. [2024-06-27 17:53:49,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15869 conditions, 2749 events. 1556/2749 cut-off events. For 126695/126695 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15879 event pairs, 424 based on Foata normal form. 2/2624 useless extension candidates. Maximal degree in co-relation 15730. Up to 2448 conditions per place. [2024-06-27 17:53:49,988 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 248 selfloop transitions, 23 changer transitions 0/278 dead transitions. [2024-06-27 17:53:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 278 transitions, 3378 flow [2024-06-27 17:53:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:53:49,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-06-27 17:53:49,989 INFO L175 Difference]: Start difference. First operand has 276 places, 245 transitions, 2642 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:53:49,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 278 transitions, 3378 flow [2024-06-27 17:53:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 278 transitions, 3204 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 17:53:50,519 INFO L231 Difference]: Finished difference. Result has 280 places, 246 transitions, 2542 flow [2024-06-27 17:53:50,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2542, PETRI_PLACES=280, PETRI_TRANSITIONS=246} [2024-06-27 17:53:50,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 17:53:50,521 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 246 transitions, 2542 flow [2024-06-27 17:53:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:50,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:50,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 17:53:50,522 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:50,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash 967687707, now seen corresponding path program 3 times [2024-06-27 17:53:50,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:50,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260614323] [2024-06-27 17:53:50,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:50,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260614323] [2024-06-27 17:53:52,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260614323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:52,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694901428] [2024-06-27 17:53:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:52,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:52,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 246 transitions, 2542 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:52,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:52,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:52,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:53,830 INFO L124 PetriNetUnfolderBase]: 1580/2805 cut-off events. [2024-06-27 17:53:53,831 INFO L125 PetriNetUnfolderBase]: For 129997/129997 co-relation queries the response was YES. [2024-06-27 17:53:53,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16150 conditions, 2805 events. 1580/2805 cut-off events. For 129997/129997 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16371 event pairs, 426 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 16009. Up to 2469 conditions per place. [2024-06-27 17:53:53,856 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 253 selfloop transitions, 23 changer transitions 0/283 dead transitions. [2024-06-27 17:53:53,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 283 transitions, 3344 flow [2024-06-27 17:53:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:53:53,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:53:53,857 INFO L175 Difference]: Start difference. First operand has 280 places, 246 transitions, 2542 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:53:53,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 283 transitions, 3344 flow [2024-06-27 17:53:54,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 283 transitions, 3284 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 17:53:54,397 INFO L231 Difference]: Finished difference. Result has 283 places, 248 transitions, 2596 flow [2024-06-27 17:53:54,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2596, PETRI_PLACES=283, PETRI_TRANSITIONS=248} [2024-06-27 17:53:54,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 17:53:54,398 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 248 transitions, 2596 flow [2024-06-27 17:53:54,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:54,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:54,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 17:53:54,398 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:54,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -750828979, now seen corresponding path program 4 times [2024-06-27 17:53:54,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:54,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109315404] [2024-06-27 17:53:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:54,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:56,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:56,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109315404] [2024-06-27 17:53:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109315404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:56,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:53:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119940875] [2024-06-27 17:53:56,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:53:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:53:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:53:56,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:53:56,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 248 transitions, 2596 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:56,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:56,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:53:56,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:57,654 INFO L124 PetriNetUnfolderBase]: 1596/2834 cut-off events. [2024-06-27 17:53:57,655 INFO L125 PetriNetUnfolderBase]: For 133947/133947 co-relation queries the response was YES. [2024-06-27 17:53:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16418 conditions, 2834 events. 1596/2834 cut-off events. For 133947/133947 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16592 event pairs, 423 based on Foata normal form. 2/2704 useless extension candidates. Maximal degree in co-relation 16275. Up to 2505 conditions per place. [2024-06-27 17:53:57,684 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 252 selfloop transitions, 24 changer transitions 0/283 dead transitions. [2024-06-27 17:53:57,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 283 transitions, 3370 flow [2024-06-27 17:53:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:53:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:53:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:53:57,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 17:53:57,687 INFO L175 Difference]: Start difference. First operand has 283 places, 248 transitions, 2596 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:53:57,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 283 transitions, 3370 flow [2024-06-27 17:53:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 283 transitions, 3288 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 17:53:58,289 INFO L231 Difference]: Finished difference. Result has 286 places, 250 transitions, 2661 flow [2024-06-27 17:53:58,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2661, PETRI_PLACES=286, PETRI_TRANSITIONS=250} [2024-06-27 17:53:58,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-27 17:53:58,290 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 250 transitions, 2661 flow [2024-06-27 17:53:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:58,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:58,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:58,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 17:53:58,290 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:58,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash -643143897, now seen corresponding path program 1 times [2024-06-27 17:53:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099153035] [2024-06-27 17:53:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:01,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:01,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099153035] [2024-06-27 17:54:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099153035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:01,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:01,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024252664] [2024-06-27 17:54:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:01,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:01,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:01,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:01,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 250 transitions, 2661 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:01,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:01,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:01,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:02,841 INFO L124 PetriNetUnfolderBase]: 1609/2853 cut-off events. [2024-06-27 17:54:02,841 INFO L125 PetriNetUnfolderBase]: For 136685/136685 co-relation queries the response was YES. [2024-06-27 17:54:02,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16527 conditions, 2853 events. 1609/2853 cut-off events. For 136685/136685 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16704 event pairs, 444 based on Foata normal form. 2/2719 useless extension candidates. Maximal degree in co-relation 16383. Up to 2537 conditions per place. [2024-06-27 17:54:02,871 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 250 selfloop transitions, 26 changer transitions 0/283 dead transitions. [2024-06-27 17:54:02,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 283 transitions, 3359 flow [2024-06-27 17:54:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:54:02,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37995337995337997 [2024-06-27 17:54:02,873 INFO L175 Difference]: Start difference. First operand has 286 places, 250 transitions, 2661 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:54:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 283 transitions, 3359 flow [2024-06-27 17:54:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 283 transitions, 3228 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:03,391 INFO L231 Difference]: Finished difference. Result has 289 places, 252 transitions, 2643 flow [2024-06-27 17:54:03,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2643, PETRI_PLACES=289, PETRI_TRANSITIONS=252} [2024-06-27 17:54:03,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 17:54:03,392 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 252 transitions, 2643 flow [2024-06-27 17:54:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:03,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:03,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 17:54:03,393 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:03,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 470133131, now seen corresponding path program 5 times [2024-06-27 17:54:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:03,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322690716] [2024-06-27 17:54:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322690716] [2024-06-27 17:54:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322690716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679898986] [2024-06-27 17:54:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:06,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:06,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 252 transitions, 2643 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:06,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:06,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:06,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:07,545 INFO L124 PetriNetUnfolderBase]: 1625/2881 cut-off events. [2024-06-27 17:54:07,545 INFO L125 PetriNetUnfolderBase]: For 139113/139113 co-relation queries the response was YES. [2024-06-27 17:54:07,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16680 conditions, 2881 events. 1625/2881 cut-off events. For 139113/139113 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16922 event pairs, 408 based on Foata normal form. 2/2747 useless extension candidates. Maximal degree in co-relation 16535. Up to 2438 conditions per place. [2024-06-27 17:54:07,574 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 235 selfloop transitions, 42 changer transitions 0/284 dead transitions. [2024-06-27 17:54:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 284 transitions, 3393 flow [2024-06-27 17:54:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:54:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:54:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:54:07,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025641025641026 [2024-06-27 17:54:07,575 INFO L175 Difference]: Start difference. First operand has 289 places, 252 transitions, 2643 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:54:07,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 284 transitions, 3393 flow [2024-06-27 17:54:08,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 284 transitions, 3304 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:08,107 INFO L231 Difference]: Finished difference. Result has 290 places, 254 transitions, 2741 flow [2024-06-27 17:54:08,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2741, PETRI_PLACES=290, PETRI_TRANSITIONS=254} [2024-06-27 17:54:08,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 17:54:08,108 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 254 transitions, 2741 flow [2024-06-27 17:54:08,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:08,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:08,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 17:54:08,108 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:08,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 470430359, now seen corresponding path program 2 times [2024-06-27 17:54:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307623456] [2024-06-27 17:54:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:12,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307623456] [2024-06-27 17:54:12,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307623456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:12,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:12,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283478692] [2024-06-27 17:54:12,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:12,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:12,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:12,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 254 transitions, 2741 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:12,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:12,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:12,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:14,710 INFO L124 PetriNetUnfolderBase]: 1863/3259 cut-off events. [2024-06-27 17:54:14,710 INFO L125 PetriNetUnfolderBase]: For 144693/144693 co-relation queries the response was YES. [2024-06-27 17:54:14,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19041 conditions, 3259 events. 1863/3259 cut-off events. For 144693/144693 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19307 event pairs, 450 based on Foata normal form. 2/3101 useless extension candidates. Maximal degree in co-relation 18895. Up to 2737 conditions per place. [2024-06-27 17:54:14,746 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 274 selfloop transitions, 66 changer transitions 0/347 dead transitions. [2024-06-27 17:54:14,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 347 transitions, 4288 flow [2024-06-27 17:54:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:54:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:54:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2024-06-27 17:54:14,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865877712031558 [2024-06-27 17:54:14,747 INFO L175 Difference]: Start difference. First operand has 290 places, 254 transitions, 2741 flow. Second operand 13 states and 196 transitions. [2024-06-27 17:54:14,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 347 transitions, 4288 flow [2024-06-27 17:54:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 347 transitions, 4050 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:15,590 INFO L231 Difference]: Finished difference. Result has 302 places, 306 transitions, 3471 flow [2024-06-27 17:54:15,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3471, PETRI_PLACES=302, PETRI_TRANSITIONS=306} [2024-06-27 17:54:15,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 17:54:15,591 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 306 transitions, 3471 flow [2024-06-27 17:54:15,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:15,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:15,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 17:54:15,592 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:15,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1245693, now seen corresponding path program 6 times [2024-06-27 17:54:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541604500] [2024-06-27 17:54:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:15,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:18,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:18,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541604500] [2024-06-27 17:54:18,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541604500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:18,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:18,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:18,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115638958] [2024-06-27 17:54:18,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:18,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:18,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:18,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:18,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 306 transitions, 3471 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:18,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:18,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:18,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:19,494 INFO L124 PetriNetUnfolderBase]: 1907/3359 cut-off events. [2024-06-27 17:54:19,494 INFO L125 PetriNetUnfolderBase]: For 148921/148921 co-relation queries the response was YES. [2024-06-27 17:54:19,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20322 conditions, 3359 events. 1907/3359 cut-off events. For 148921/148921 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20052 event pairs, 436 based on Foata normal form. 2/3194 useless extension candidates. Maximal degree in co-relation 20168. Up to 2918 conditions per place. [2024-06-27 17:54:19,527 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 295 selfloop transitions, 59 changer transitions 0/361 dead transitions. [2024-06-27 17:54:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 361 transitions, 4717 flow [2024-06-27 17:54:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:54:19,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40093240093240096 [2024-06-27 17:54:19,529 INFO L175 Difference]: Start difference. First operand has 302 places, 306 transitions, 3471 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:54:19,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 361 transitions, 4717 flow [2024-06-27 17:54:20,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 361 transitions, 4669 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:20,436 INFO L231 Difference]: Finished difference. Result has 316 places, 325 transitions, 3958 flow [2024-06-27 17:54:20,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3958, PETRI_PLACES=316, PETRI_TRANSITIONS=325} [2024-06-27 17:54:20,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 17:54:20,439 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 325 transitions, 3958 flow [2024-06-27 17:54:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:20,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:20,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:20,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 17:54:20,439 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:20,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1628398783, now seen corresponding path program 7 times [2024-06-27 17:54:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672832260] [2024-06-27 17:54:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:22,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672832260] [2024-06-27 17:54:22,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672832260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:22,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331212693] [2024-06-27 17:54:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:22,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:22,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 325 transitions, 3958 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:22,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:22,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:22,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:24,272 INFO L124 PetriNetUnfolderBase]: 1930/3406 cut-off events. [2024-06-27 17:54:24,272 INFO L125 PetriNetUnfolderBase]: For 154889/154889 co-relation queries the response was YES. [2024-06-27 17:54:24,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21107 conditions, 3406 events. 1930/3406 cut-off events. For 154889/154889 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20455 event pairs, 457 based on Foata normal form. 2/3238 useless extension candidates. Maximal degree in co-relation 20946. Up to 3013 conditions per place. [2024-06-27 17:54:24,308 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 309 selfloop transitions, 47 changer transitions 0/363 dead transitions. [2024-06-27 17:54:24,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 363 transitions, 4940 flow [2024-06-27 17:54:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 17:54:24,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962703962703963 [2024-06-27 17:54:24,310 INFO L175 Difference]: Start difference. First operand has 316 places, 325 transitions, 3958 flow. Second operand 11 states and 170 transitions. [2024-06-27 17:54:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 363 transitions, 4940 flow [2024-06-27 17:54:25,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 363 transitions, 4863 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:25,130 INFO L231 Difference]: Finished difference. Result has 324 places, 330 transitions, 4097 flow [2024-06-27 17:54:25,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4097, PETRI_PLACES=324, PETRI_TRANSITIONS=330} [2024-06-27 17:54:25,131 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 17:54:25,131 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 330 transitions, 4097 flow [2024-06-27 17:54:25,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:25,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:25,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:25,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 17:54:25,132 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:25,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1332354067, now seen corresponding path program 3 times [2024-06-27 17:54:25,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255919174] [2024-06-27 17:54:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255919174] [2024-06-27 17:54:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255919174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:28,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248103624] [2024-06-27 17:54:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:28,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:28,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 330 transitions, 4097 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:28,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:28,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:28,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:30,196 INFO L124 PetriNetUnfolderBase]: 2036/3569 cut-off events. [2024-06-27 17:54:30,197 INFO L125 PetriNetUnfolderBase]: For 178085/178085 co-relation queries the response was YES. [2024-06-27 17:54:30,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 3569 events. 2036/3569 cut-off events. For 178085/178085 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21453 event pairs, 450 based on Foata normal form. 4/3377 useless extension candidates. Maximal degree in co-relation 22391. Up to 2877 conditions per place. [2024-06-27 17:54:30,238 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 293 selfloop transitions, 102 changer transitions 0/402 dead transitions. [2024-06-27 17:54:30,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 402 transitions, 5722 flow [2024-06-27 17:54:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:54:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:54:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 17:54:30,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-27 17:54:30,241 INFO L175 Difference]: Start difference. First operand has 324 places, 330 transitions, 4097 flow. Second operand 12 states and 190 transitions. [2024-06-27 17:54:30,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 402 transitions, 5722 flow [2024-06-27 17:54:31,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 402 transitions, 5629 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:31,234 INFO L231 Difference]: Finished difference. Result has 333 places, 358 transitions, 4768 flow [2024-06-27 17:54:31,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4768, PETRI_PLACES=333, PETRI_TRANSITIONS=358} [2024-06-27 17:54:31,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 17:54:31,235 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 358 transitions, 4768 flow [2024-06-27 17:54:31,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:31,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:31,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:31,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 17:54:31,235 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:31,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1628392273, now seen corresponding path program 8 times [2024-06-27 17:54:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:31,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194543459] [2024-06-27 17:54:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:33,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:33,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194543459] [2024-06-27 17:54:33,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194543459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:33,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:33,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527112996] [2024-06-27 17:54:33,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:33,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:33,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:33,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 358 transitions, 4768 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:33,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:33,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:33,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:35,003 INFO L124 PetriNetUnfolderBase]: 2076/3648 cut-off events. [2024-06-27 17:54:35,003 INFO L125 PetriNetUnfolderBase]: For 177303/177303 co-relation queries the response was YES. [2024-06-27 17:54:35,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23651 conditions, 3648 events. 2076/3648 cut-off events. For 177303/177303 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22116 event pairs, 470 based on Foata normal form. 2/3452 useless extension candidates. Maximal degree in co-relation 23483. Up to 3228 conditions per place. [2024-06-27 17:54:35,047 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 346 selfloop transitions, 44 changer transitions 0/397 dead transitions. [2024-06-27 17:54:35,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 397 transitions, 5871 flow [2024-06-27 17:54:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 17:54:35,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2024-06-27 17:54:35,049 INFO L175 Difference]: Start difference. First operand has 333 places, 358 transitions, 4768 flow. Second operand 11 states and 173 transitions. [2024-06-27 17:54:35,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 397 transitions, 5871 flow [2024-06-27 17:54:36,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 397 transitions, 5696 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:36,048 INFO L231 Difference]: Finished difference. Result has 339 places, 360 transitions, 4738 flow [2024-06-27 17:54:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4738, PETRI_PLACES=339, PETRI_TRANSITIONS=360} [2024-06-27 17:54:36,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 17:54:36,049 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 360 transitions, 4738 flow [2024-06-27 17:54:36,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:36,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 17:54:36,050 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:36,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1628219293, now seen corresponding path program 9 times [2024-06-27 17:54:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208340433] [2024-06-27 17:54:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:38,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:38,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208340433] [2024-06-27 17:54:38,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208340433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:38,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:38,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884237872] [2024-06-27 17:54:38,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:38,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:38,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 360 transitions, 4738 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:38,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:38,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:38,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,871 INFO L124 PetriNetUnfolderBase]: 2129/3762 cut-off events. [2024-06-27 17:54:39,871 INFO L125 PetriNetUnfolderBase]: For 183122/183122 co-relation queries the response was YES. [2024-06-27 17:54:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24264 conditions, 3762 events. 2129/3762 cut-off events. For 183122/183122 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23089 event pairs, 490 based on Foata normal form. 2/3559 useless extension candidates. Maximal degree in co-relation 24093. Up to 3318 conditions per place. [2024-06-27 17:54:39,908 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 353 selfloop transitions, 43 changer transitions 0/403 dead transitions. [2024-06-27 17:54:39,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 403 transitions, 5835 flow [2024-06-27 17:54:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 17:54:39,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-06-27 17:54:39,910 INFO L175 Difference]: Start difference. First operand has 339 places, 360 transitions, 4738 flow. Second operand 11 states and 174 transitions. [2024-06-27 17:54:39,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 403 transitions, 5835 flow [2024-06-27 17:54:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 403 transitions, 5732 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 17:54:40,881 INFO L231 Difference]: Finished difference. Result has 344 places, 365 transitions, 4829 flow [2024-06-27 17:54:40,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4829, PETRI_PLACES=344, PETRI_TRANSITIONS=365} [2024-06-27 17:54:40,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 17:54:40,882 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 365 transitions, 4829 flow [2024-06-27 17:54:40,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:40,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:40,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 17:54:40,882 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:40,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1864881973, now seen corresponding path program 1 times [2024-06-27 17:54:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477685787] [2024-06-27 17:54:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477685787] [2024-06-27 17:54:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477685787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779937379] [2024-06-27 17:54:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:43,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:44,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:44,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 365 transitions, 4829 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:44,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:44,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:44,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:45,529 INFO L124 PetriNetUnfolderBase]: 2177/3849 cut-off events. [2024-06-27 17:54:45,530 INFO L125 PetriNetUnfolderBase]: For 190979/190979 co-relation queries the response was YES. [2024-06-27 17:54:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24847 conditions, 3849 events. 2177/3849 cut-off events. For 190979/190979 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23901 event pairs, 580 based on Foata normal form. 2/3641 useless extension candidates. Maximal degree in co-relation 24673. Up to 3421 conditions per place. [2024-06-27 17:54:45,566 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 351 selfloop transitions, 49 changer transitions 0/407 dead transitions. [2024-06-27 17:54:45,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 407 transitions, 5960 flow [2024-06-27 17:54:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:54:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:54:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2024-06-27 17:54:45,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782051282051282 [2024-06-27 17:54:45,568 INFO L175 Difference]: Start difference. First operand has 344 places, 365 transitions, 4829 flow. Second operand 12 states and 177 transitions. [2024-06-27 17:54:45,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 407 transitions, 5960 flow [2024-06-27 17:54:46,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 407 transitions, 5828 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:46,533 INFO L231 Difference]: Finished difference. Result has 352 places, 375 transitions, 5050 flow [2024-06-27 17:54:46,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4701, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5050, PETRI_PLACES=352, PETRI_TRANSITIONS=375} [2024-06-27 17:54:46,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 17:54:46,533 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 375 transitions, 5050 flow [2024-06-27 17:54:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:46,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:46,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 17:54:46,534 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:46,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1323776119, now seen corresponding path program 10 times [2024-06-27 17:54:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396809858] [2024-06-27 17:54:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:49,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396809858] [2024-06-27 17:54:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396809858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:49,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172648204] [2024-06-27 17:54:49,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:49,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:49,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:49,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:49,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 375 transitions, 5050 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:49,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:49,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:49,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:50,783 INFO L124 PetriNetUnfolderBase]: 2209/3909 cut-off events. [2024-06-27 17:54:50,783 INFO L125 PetriNetUnfolderBase]: For 196035/196035 co-relation queries the response was YES. [2024-06-27 17:54:50,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25310 conditions, 3909 events. 2209/3909 cut-off events. For 196035/196035 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24348 event pairs, 497 based on Foata normal form. 2/3698 useless extension candidates. Maximal degree in co-relation 25132. Up to 3425 conditions per place. [2024-06-27 17:54:50,826 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 346 selfloop transitions, 60 changer transitions 0/413 dead transitions. [2024-06-27 17:54:50,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 413 transitions, 6119 flow [2024-06-27 17:54:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:54:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:54:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 17:54:50,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2024-06-27 17:54:50,827 INFO L175 Difference]: Start difference. First operand has 352 places, 375 transitions, 5050 flow. Second operand 11 states and 173 transitions. [2024-06-27 17:54:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 413 transitions, 6119 flow [2024-06-27 17:54:51,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 413 transitions, 5971 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:51,956 INFO L231 Difference]: Finished difference. Result has 360 places, 379 transitions, 5155 flow [2024-06-27 17:54:51,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5155, PETRI_PLACES=360, PETRI_TRANSITIONS=379} [2024-06-27 17:54:51,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 17:54:51,957 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 379 transitions, 5155 flow [2024-06-27 17:54:51,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:51,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:51,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:51,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 17:54:51,957 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:51,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1102377157, now seen corresponding path program 4 times [2024-06-27 17:54:51,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:51,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859650094] [2024-06-27 17:54:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:55,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859650094] [2024-06-27 17:54:55,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859650094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:54:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623795055] [2024-06-27 17:54:55,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:54:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:54:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:54:55,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:54:55,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 379 transitions, 5155 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:55,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:55,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:54:55,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:56,660 INFO L124 PetriNetUnfolderBase]: 2222/3928 cut-off events. [2024-06-27 17:54:56,660 INFO L125 PetriNetUnfolderBase]: For 197470/197470 co-relation queries the response was YES. [2024-06-27 17:54:56,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25404 conditions, 3928 events. 2222/3928 cut-off events. For 197470/197470 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24433 event pairs, 515 based on Foata normal form. 2/3713 useless extension candidates. Maximal degree in co-relation 25224. Up to 3497 conditions per place. [2024-06-27 17:54:56,706 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 353 selfloop transitions, 54 changer transitions 0/414 dead transitions. [2024-06-27 17:54:56,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 414 transitions, 6138 flow [2024-06-27 17:54:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:54:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:54:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 180 transitions. [2024-06-27 17:54:56,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-27 17:54:56,708 INFO L175 Difference]: Start difference. First operand has 360 places, 379 transitions, 5155 flow. Second operand 12 states and 180 transitions. [2024-06-27 17:54:56,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 414 transitions, 6138 flow [2024-06-27 17:54:57,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 414 transitions, 5908 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-27 17:54:57,909 INFO L231 Difference]: Finished difference. Result has 364 places, 382 transitions, 5113 flow [2024-06-27 17:54:57,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5113, PETRI_PLACES=364, PETRI_TRANSITIONS=382} [2024-06-27 17:54:57,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 17:54:57,910 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 382 transitions, 5113 flow [2024-06-27 17:54:57,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:54:57,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:57,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:57,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 17:54:57,910 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:57,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1864583071, now seen corresponding path program 5 times [2024-06-27 17:54:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:57,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308400226] [2024-06-27 17:54:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:57,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:01,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308400226] [2024-06-27 17:55:01,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308400226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:01,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633569454] [2024-06-27 17:55:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:01,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:01,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 382 transitions, 5113 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:01,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:01,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:03,432 INFO L124 PetriNetUnfolderBase]: 2235/3947 cut-off events. [2024-06-27 17:55:03,432 INFO L125 PetriNetUnfolderBase]: For 197893/197893 co-relation queries the response was YES. [2024-06-27 17:55:03,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25356 conditions, 3947 events. 2235/3947 cut-off events. For 197893/197893 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24544 event pairs, 503 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 25175. Up to 3392 conditions per place. [2024-06-27 17:55:03,477 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 330 selfloop transitions, 82 changer transitions 0/419 dead transitions. [2024-06-27 17:55:03,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 419 transitions, 6118 flow [2024-06-27 17:55:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:55:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:55:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-27 17:55:03,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-27 17:55:03,479 INFO L175 Difference]: Start difference. First operand has 364 places, 382 transitions, 5113 flow. Second operand 12 states and 184 transitions. [2024-06-27 17:55:03,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 419 transitions, 6118 flow [2024-06-27 17:55:04,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 419 transitions, 5984 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:04,632 INFO L231 Difference]: Finished difference. Result has 368 places, 385 transitions, 5227 flow [2024-06-27 17:55:04,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5227, PETRI_PLACES=368, PETRI_TRANSITIONS=385} [2024-06-27 17:55:04,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 17:55:04,633 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 385 transitions, 5227 flow [2024-06-27 17:55:04,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:04,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:04,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:04,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 17:55:04,633 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:04,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1856539501, now seen corresponding path program 6 times [2024-06-27 17:55:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847168279] [2024-06-27 17:55:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:08,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847168279] [2024-06-27 17:55:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847168279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:08,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700833861] [2024-06-27 17:55:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:08,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:08,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 385 transitions, 5227 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:08,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:08,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,731 INFO L124 PetriNetUnfolderBase]: 2231/3941 cut-off events. [2024-06-27 17:55:09,732 INFO L125 PetriNetUnfolderBase]: For 189008/189008 co-relation queries the response was YES. [2024-06-27 17:55:09,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25170 conditions, 3941 events. 2231/3941 cut-off events. For 189008/189008 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24503 event pairs, 506 based on Foata normal form. 2/3723 useless extension candidates. Maximal degree in co-relation 24987. Up to 3456 conditions per place. [2024-06-27 17:55:09,773 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 346 selfloop transitions, 66 changer transitions 0/419 dead transitions. [2024-06-27 17:55:09,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 419 transitions, 6170 flow [2024-06-27 17:55:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:55:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:55:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-27 17:55:09,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 17:55:09,774 INFO L175 Difference]: Start difference. First operand has 368 places, 385 transitions, 5227 flow. Second operand 12 states and 182 transitions. [2024-06-27 17:55:09,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 419 transitions, 6170 flow [2024-06-27 17:55:10,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 419 transitions, 5956 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:10,743 INFO L231 Difference]: Finished difference. Result has 373 places, 386 transitions, 5167 flow [2024-06-27 17:55:10,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5013, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5167, PETRI_PLACES=373, PETRI_TRANSITIONS=386} [2024-06-27 17:55:10,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 17:55:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 386 transitions, 5167 flow [2024-06-27 17:55:10,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:10,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:10,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 17:55:10,744 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:10,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 208640309, now seen corresponding path program 11 times [2024-06-27 17:55:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095501865] [2024-06-27 17:55:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:13,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095501865] [2024-06-27 17:55:13,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095501865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:13,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:13,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:13,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766192820] [2024-06-27 17:55:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:13,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:13,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:13,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:13,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 386 transitions, 5167 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:13,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:13,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:13,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:15,212 INFO L124 PetriNetUnfolderBase]: 2247/3969 cut-off events. [2024-06-27 17:55:15,213 INFO L125 PetriNetUnfolderBase]: For 193009/193009 co-relation queries the response was YES. [2024-06-27 17:55:15,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 3969 events. 2247/3969 cut-off events. For 193009/193009 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24743 event pairs, 497 based on Foata normal form. 2/3753 useless extension candidates. Maximal degree in co-relation 25205. Up to 3464 conditions per place. [2024-06-27 17:55:15,259 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 350 selfloop transitions, 59 changer transitions 0/416 dead transitions. [2024-06-27 17:55:15,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 416 transitions, 6217 flow [2024-06-27 17:55:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:55:15,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-06-27 17:55:15,260 INFO L175 Difference]: Start difference. First operand has 373 places, 386 transitions, 5167 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:55:15,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 416 transitions, 6217 flow [2024-06-27 17:55:16,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 416 transitions, 6075 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:16,295 INFO L231 Difference]: Finished difference. Result has 374 places, 389 transitions, 5285 flow [2024-06-27 17:55:16,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5285, PETRI_PLACES=374, PETRI_TRANSITIONS=389} [2024-06-27 17:55:16,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 17:55:16,295 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 389 transitions, 5285 flow [2024-06-27 17:55:16,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:16,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:16,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:16,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 17:55:16,296 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:16,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 208633799, now seen corresponding path program 12 times [2024-06-27 17:55:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:16,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002615063] [2024-06-27 17:55:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:16,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:18,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002615063] [2024-06-27 17:55:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002615063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:18,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423541896] [2024-06-27 17:55:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:18,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:18,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 389 transitions, 5285 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:18,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:18,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:18,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:20,122 INFO L124 PetriNetUnfolderBase]: 2263/3997 cut-off events. [2024-06-27 17:55:20,123 INFO L125 PetriNetUnfolderBase]: For 200626/200626 co-relation queries the response was YES. [2024-06-27 17:55:20,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25860 conditions, 3997 events. 2263/3997 cut-off events. For 200626/200626 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24992 event pairs, 481 based on Foata normal form. 2/3781 useless extension candidates. Maximal degree in co-relation 25674. Up to 3469 conditions per place. [2024-06-27 17:55:20,173 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 361 selfloop transitions, 56 changer transitions 0/424 dead transitions. [2024-06-27 17:55:20,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 424 transitions, 6479 flow [2024-06-27 17:55:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-27 17:55:20,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 17:55:20,174 INFO L175 Difference]: Start difference. First operand has 374 places, 389 transitions, 5285 flow. Second operand 10 states and 155 transitions. [2024-06-27 17:55:20,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 424 transitions, 6479 flow [2024-06-27 17:55:21,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 424 transitions, 6249 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:21,373 INFO L231 Difference]: Finished difference. Result has 377 places, 395 transitions, 5426 flow [2024-06-27 17:55:21,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5426, PETRI_PLACES=377, PETRI_TRANSITIONS=395} [2024-06-27 17:55:21,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 17:55:21,373 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 395 transitions, 5426 flow [2024-06-27 17:55:21,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:21,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:21,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:21,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 17:55:21,374 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:21,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 208460819, now seen corresponding path program 13 times [2024-06-27 17:55:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:21,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578714610] [2024-06-27 17:55:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:21,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578714610] [2024-06-27 17:55:23,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578714610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:23,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:23,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536882332] [2024-06-27 17:55:23,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:23,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:23,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:23,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 395 transitions, 5426 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:23,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:23,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:23,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:25,385 INFO L124 PetriNetUnfolderBase]: 2287/4054 cut-off events. [2024-06-27 17:55:25,386 INFO L125 PetriNetUnfolderBase]: For 206902/206902 co-relation queries the response was YES. [2024-06-27 17:55:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 4054 events. 2287/4054 cut-off events. For 206902/206902 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25479 event pairs, 471 based on Foata normal form. 2/3832 useless extension candidates. Maximal degree in co-relation 26002. Up to 3468 conditions per place. [2024-06-27 17:55:25,432 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 369 selfloop transitions, 54 changer transitions 0/430 dead transitions. [2024-06-27 17:55:25,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 430 transitions, 6562 flow [2024-06-27 17:55:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:55:25,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:55:25,433 INFO L175 Difference]: Start difference. First operand has 377 places, 395 transitions, 5426 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:55:25,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 430 transitions, 6562 flow [2024-06-27 17:55:26,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 430 transitions, 6269 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:26,657 INFO L231 Difference]: Finished difference. Result has 382 places, 397 transitions, 5339 flow [2024-06-27 17:55:26,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5133, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5339, PETRI_PLACES=382, PETRI_TRANSITIONS=397} [2024-06-27 17:55:26,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 17:55:26,658 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 397 transitions, 5339 flow [2024-06-27 17:55:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:26,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:26,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:26,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 17:55:26,659 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:26,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 444824597, now seen corresponding path program 7 times [2024-06-27 17:55:26,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:26,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897291461] [2024-06-27 17:55:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897291461] [2024-06-27 17:55:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897291461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:29,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:29,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016352686] [2024-06-27 17:55:29,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:29,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:29,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:29,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:29,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 397 transitions, 5339 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:29,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:29,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:29,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:31,455 INFO L124 PetriNetUnfolderBase]: 2300/4073 cut-off events. [2024-06-27 17:55:31,455 INFO L125 PetriNetUnfolderBase]: For 203312/203312 co-relation queries the response was YES. [2024-06-27 17:55:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25972 conditions, 4073 events. 2300/4073 cut-off events. For 203312/203312 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25625 event pairs, 489 based on Foata normal form. 2/3847 useless extension candidates. Maximal degree in co-relation 25781. Up to 3311 conditions per place. [2024-06-27 17:55:31,506 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 314 selfloop transitions, 105 changer transitions 0/426 dead transitions. [2024-06-27 17:55:31,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 426 transitions, 6333 flow [2024-06-27 17:55:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:55:31,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:55:31,507 INFO L175 Difference]: Start difference. First operand has 382 places, 397 transitions, 5339 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:55:31,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 426 transitions, 6333 flow [2024-06-27 17:55:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 426 transitions, 6149 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 17:55:32,603 INFO L231 Difference]: Finished difference. Result has 385 places, 399 transitions, 5445 flow [2024-06-27 17:55:32,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5445, PETRI_PLACES=385, PETRI_TRANSITIONS=399} [2024-06-27 17:55:32,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 17:55:32,604 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 399 transitions, 5445 flow [2024-06-27 17:55:32,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:32,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:32,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:32,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 17:55:32,605 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:32,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1016577933, now seen corresponding path program 8 times [2024-06-27 17:55:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:32,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732975456] [2024-06-27 17:55:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:35,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:35,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732975456] [2024-06-27 17:55:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732975456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:35,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:35,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 17:55:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791718862] [2024-06-27 17:55:35,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:55:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:55:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:55:35,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:35,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 399 transitions, 5445 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:35,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:35,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:35,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:37,107 INFO L124 PetriNetUnfolderBase]: 2313/4078 cut-off events. [2024-06-27 17:55:37,107 INFO L125 PetriNetUnfolderBase]: For 200683/200683 co-relation queries the response was YES. [2024-06-27 17:55:37,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26104 conditions, 4078 events. 2313/4078 cut-off events. For 200683/200683 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25634 event pairs, 393 based on Foata normal form. 2/3850 useless extension candidates. Maximal degree in co-relation 25912. Up to 2525 conditions per place. [2024-06-27 17:55:37,148 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 199 selfloop transitions, 225 changer transitions 0/431 dead transitions. [2024-06-27 17:55:37,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 431 transitions, 6688 flow [2024-06-27 17:55:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 17:55:37,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205128205128205 [2024-06-27 17:55:37,150 INFO L175 Difference]: Start difference. First operand has 385 places, 399 transitions, 5445 flow. Second operand 10 states and 164 transitions. [2024-06-27 17:55:37,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 431 transitions, 6688 flow [2024-06-27 17:55:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 431 transitions, 6421 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-27 17:55:38,250 INFO L231 Difference]: Finished difference. Result has 385 places, 402 transitions, 5722 flow [2024-06-27 17:55:38,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5722, PETRI_PLACES=385, PETRI_TRANSITIONS=402} [2024-06-27 17:55:38,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 17:55:38,251 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 402 transitions, 5722 flow [2024-06-27 17:55:38,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:38,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:38,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 17:55:38,251 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:38,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1222859905, now seen corresponding path program 2 times [2024-06-27 17:55:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407344102] [2024-06-27 17:55:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:41,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:41,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407344102] [2024-06-27 17:55:41,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407344102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:41,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041251967] [2024-06-27 17:55:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:41,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:41,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:41,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 402 transitions, 5722 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:41,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:41,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:41,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:43,124 INFO L124 PetriNetUnfolderBase]: 2310/4085 cut-off events. [2024-06-27 17:55:43,124 INFO L125 PetriNetUnfolderBase]: For 185346/185346 co-relation queries the response was YES. [2024-06-27 17:55:43,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26295 conditions, 4085 events. 2310/4085 cut-off events. For 185346/185346 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25709 event pairs, 596 based on Foata normal form. 2/3861 useless extension candidates. Maximal degree in co-relation 26104. Up to 3489 conditions per place. [2024-06-27 17:55:43,176 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 355 selfloop transitions, 71 changer transitions 0/433 dead transitions. [2024-06-27 17:55:43,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 433 transitions, 6822 flow [2024-06-27 17:55:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:55:43,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:55:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-27 17:55:43,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37995337995337997 [2024-06-27 17:55:43,177 INFO L175 Difference]: Start difference. First operand has 385 places, 402 transitions, 5722 flow. Second operand 11 states and 163 transitions. [2024-06-27 17:55:43,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 433 transitions, 6822 flow [2024-06-27 17:55:44,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 433 transitions, 6481 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 17:55:44,258 INFO L231 Difference]: Finished difference. Result has 390 places, 404 transitions, 5667 flow [2024-06-27 17:55:44,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5667, PETRI_PLACES=390, PETRI_TRANSITIONS=404} [2024-06-27 17:55:44,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 17:55:44,259 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 404 transitions, 5667 flow [2024-06-27 17:55:44,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:44,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:44,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:44,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 17:55:44,259 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:44,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1007996265, now seen corresponding path program 14 times [2024-06-27 17:55:44,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:44,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299284702] [2024-06-27 17:55:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299284702] [2024-06-27 17:55:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299284702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:46,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723777456] [2024-06-27 17:55:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:46,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:46,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 404 transitions, 5667 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:46,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:46,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:46,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:48,516 INFO L124 PetriNetUnfolderBase]: 2330/4129 cut-off events. [2024-06-27 17:55:48,516 INFO L125 PetriNetUnfolderBase]: For 192143/192143 co-relation queries the response was YES. [2024-06-27 17:55:48,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26362 conditions, 4129 events. 2330/4129 cut-off events. For 192143/192143 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26052 event pairs, 514 based on Foata normal form. 2/3900 useless extension candidates. Maximal degree in co-relation 26170. Up to 3495 conditions per place. [2024-06-27 17:55:48,566 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 352 selfloop transitions, 76 changer transitions 0/435 dead transitions. [2024-06-27 17:55:48,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 435 transitions, 6755 flow [2024-06-27 17:55:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 17:55:48,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 17:55:48,568 INFO L175 Difference]: Start difference. First operand has 390 places, 404 transitions, 5667 flow. Second operand 10 states and 156 transitions. [2024-06-27 17:55:48,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 435 transitions, 6755 flow [2024-06-27 17:55:49,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 435 transitions, 6495 flow, removed 65 selfloop flow, removed 9 redundant places. [2024-06-27 17:55:49,821 INFO L231 Difference]: Finished difference. Result has 391 places, 405 transitions, 5616 flow [2024-06-27 17:55:49,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5616, PETRI_PLACES=391, PETRI_TRANSITIONS=405} [2024-06-27 17:55:49,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 17:55:49,822 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 405 transitions, 5616 flow [2024-06-27 17:55:49,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:49,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:49,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:49,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 17:55:49,823 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:49,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1007989755, now seen corresponding path program 15 times [2024-06-27 17:55:49,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:49,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760278524] [2024-06-27 17:55:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:52,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760278524] [2024-06-27 17:55:52,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760278524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:52,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:52,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17349077] [2024-06-27 17:55:52,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:52,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:52,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:52,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 405 transitions, 5616 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:52,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:52,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:52,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:53,916 INFO L124 PetriNetUnfolderBase]: 2354/4186 cut-off events. [2024-06-27 17:55:53,916 INFO L125 PetriNetUnfolderBase]: For 189047/189047 co-relation queries the response was YES. [2024-06-27 17:55:53,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26645 conditions, 4186 events. 2354/4186 cut-off events. For 189047/189047 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26556 event pairs, 507 based on Foata normal form. 2/3952 useless extension candidates. Maximal degree in co-relation 26452. Up to 3508 conditions per place. [2024-06-27 17:55:53,968 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 360 selfloop transitions, 73 changer transitions 0/440 dead transitions. [2024-06-27 17:55:53,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 440 transitions, 6770 flow [2024-06-27 17:55:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:55:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:55:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:55:53,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 17:55:53,970 INFO L175 Difference]: Start difference. First operand has 391 places, 405 transitions, 5616 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:55:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 440 transitions, 6770 flow [2024-06-27 17:55:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 440 transitions, 6593 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:55:55,078 INFO L231 Difference]: Finished difference. Result has 394 places, 407 transitions, 5684 flow [2024-06-27 17:55:55,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5684, PETRI_PLACES=394, PETRI_TRANSITIONS=407} [2024-06-27 17:55:55,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 17:55:55,079 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 407 transitions, 5684 flow [2024-06-27 17:55:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:55,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:55,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:55:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 17:55:55,079 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:55,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1033553295, now seen corresponding path program 9 times [2024-06-27 17:55:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:55,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000314124] [2024-06-27 17:55:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:58,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000314124] [2024-06-27 17:55:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000314124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:55:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052714648] [2024-06-27 17:55:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:58,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:55:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:55:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:55:58,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:55:58,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 407 transitions, 5684 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:55:58,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:58,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:55:58,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:00,072 INFO L124 PetriNetUnfolderBase]: 2367/4205 cut-off events. [2024-06-27 17:56:00,072 INFO L125 PetriNetUnfolderBase]: For 187011/187011 co-relation queries the response was YES. [2024-06-27 17:56:00,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26717 conditions, 4205 events. 2367/4205 cut-off events. For 187011/187011 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26640 event pairs, 515 based on Foata normal form. 2/3966 useless extension candidates. Maximal degree in co-relation 26522. Up to 3551 conditions per place. [2024-06-27 17:56:00,118 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 347 selfloop transitions, 81 changer transitions 0/435 dead transitions. [2024-06-27 17:56:00,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 435 transitions, 6690 flow [2024-06-27 17:56:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 17:56:00,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2024-06-27 17:56:00,120 INFO L175 Difference]: Start difference. First operand has 394 places, 407 transitions, 5684 flow. Second operand 10 states and 154 transitions. [2024-06-27 17:56:00,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 435 transitions, 6690 flow [2024-06-27 17:56:01,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 435 transitions, 6497 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 17:56:01,225 INFO L231 Difference]: Finished difference. Result has 397 places, 409 transitions, 5731 flow [2024-06-27 17:56:01,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5731, PETRI_PLACES=397, PETRI_TRANSITIONS=409} [2024-06-27 17:56:01,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 17:56:01,226 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 409 transitions, 5731 flow [2024-06-27 17:56:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:01,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:01,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:01,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 17:56:01,226 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:01,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:01,226 INFO L85 PathProgramCache]: Analyzing trace with hash 811908255, now seen corresponding path program 10 times [2024-06-27 17:56:01,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:01,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855396766] [2024-06-27 17:56:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:01,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:04,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855396766] [2024-06-27 17:56:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855396766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:04,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656089828] [2024-06-27 17:56:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:04,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:04,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 409 transitions, 5731 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:04,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:04,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:04,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:05,822 INFO L124 PetriNetUnfolderBase]: 2380/4224 cut-off events. [2024-06-27 17:56:05,823 INFO L125 PetriNetUnfolderBase]: For 187068/187068 co-relation queries the response was YES. [2024-06-27 17:56:05,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26773 conditions, 4224 events. 2380/4224 cut-off events. For 187068/187068 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26766 event pairs, 539 based on Foata normal form. 2/3982 useless extension candidates. Maximal degree in co-relation 26577. Up to 3668 conditions per place. [2024-06-27 17:56:05,876 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 366 selfloop transitions, 66 changer transitions 0/439 dead transitions. [2024-06-27 17:56:05,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 439 transitions, 6755 flow [2024-06-27 17:56:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:56:05,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822843822843823 [2024-06-27 17:56:05,877 INFO L175 Difference]: Start difference. First operand has 397 places, 409 transitions, 5731 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:56:05,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 439 transitions, 6755 flow [2024-06-27 17:56:07,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 439 transitions, 6542 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 17:56:07,100 INFO L231 Difference]: Finished difference. Result has 398 places, 411 transitions, 5729 flow [2024-06-27 17:56:07,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5729, PETRI_PLACES=398, PETRI_TRANSITIONS=411} [2024-06-27 17:56:07,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-27 17:56:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 411 transitions, 5729 flow [2024-06-27 17:56:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:07,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:07,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 17:56:07,101 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:07,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1160807211, now seen corresponding path program 11 times [2024-06-27 17:56:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440173655] [2024-06-27 17:56:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:10,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:10,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440173655] [2024-06-27 17:56:10,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440173655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:10,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:10,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924689940] [2024-06-27 17:56:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:10,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:10,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:10,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 411 transitions, 5729 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:10,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:10,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:10,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:12,149 INFO L124 PetriNetUnfolderBase]: 2393/4243 cut-off events. [2024-06-27 17:56:12,149 INFO L125 PetriNetUnfolderBase]: For 184309/184309 co-relation queries the response was YES. [2024-06-27 17:56:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 4243 events. 2393/4243 cut-off events. For 184309/184309 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26985 event pairs, 895 based on Foata normal form. 2/3998 useless extension candidates. Maximal degree in co-relation 26549. Up to 3879 conditions per place. [2024-06-27 17:56:12,203 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 405 selfloop transitions, 27 changer transitions 0/439 dead transitions. [2024-06-27 17:56:12,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 439 transitions, 6951 flow [2024-06-27 17:56:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:56:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:56:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 172 transitions. [2024-06-27 17:56:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36752136752136755 [2024-06-27 17:56:12,204 INFO L175 Difference]: Start difference. First operand has 398 places, 411 transitions, 5729 flow. Second operand 12 states and 172 transitions. [2024-06-27 17:56:12,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 439 transitions, 6951 flow [2024-06-27 17:56:13,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 439 transitions, 6770 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 17:56:13,307 INFO L231 Difference]: Finished difference. Result has 400 places, 413 transitions, 5653 flow [2024-06-27 17:56:13,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5653, PETRI_PLACES=400, PETRI_TRANSITIONS=413} [2024-06-27 17:56:13,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 17:56:13,308 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 413 transitions, 5653 flow [2024-06-27 17:56:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:13,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 17:56:13,309 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:13,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1094175653, now seen corresponding path program 16 times [2024-06-27 17:56:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:13,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059737237] [2024-06-27 17:56:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:13,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059737237] [2024-06-27 17:56:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059737237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:56:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754897319] [2024-06-27 17:56:16,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:56:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:56:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:56:16,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:16,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 413 transitions, 5653 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:16,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:16,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:17,974 INFO L124 PetriNetUnfolderBase]: 2413/4272 cut-off events. [2024-06-27 17:56:17,974 INFO L125 PetriNetUnfolderBase]: For 187531/187531 co-relation queries the response was YES. [2024-06-27 17:56:18,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26998 conditions, 4272 events. 2413/4272 cut-off events. For 187531/187531 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27164 event pairs, 432 based on Foata normal form. 2/4026 useless extension candidates. Maximal degree in co-relation 26803. Up to 3335 conditions per place. [2024-06-27 17:56:18,023 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 313 selfloop transitions, 124 changer transitions 0/444 dead transitions. [2024-06-27 17:56:18,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 444 transitions, 6759 flow [2024-06-27 17:56:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:56:18,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-27 17:56:18,025 INFO L175 Difference]: Start difference. First operand has 400 places, 413 transitions, 5653 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:56:18,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 444 transitions, 6759 flow [2024-06-27 17:56:19,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 444 transitions, 6675 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 17:56:19,147 INFO L231 Difference]: Finished difference. Result has 400 places, 414 transitions, 5869 flow [2024-06-27 17:56:19,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5569, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5869, PETRI_PLACES=400, PETRI_TRANSITIONS=414} [2024-06-27 17:56:19,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 17:56:19,148 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 414 transitions, 5869 flow [2024-06-27 17:56:19,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:19,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:19,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 17:56:19,148 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:19,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 580688727, now seen corresponding path program 12 times [2024-06-27 17:56:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119410109] [2024-06-27 17:56:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119410109] [2024-06-27 17:56:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119410109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:22,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:22,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:56:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693091743] [2024-06-27 17:56:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:22,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:56:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:56:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:56:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:22,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 414 transitions, 5869 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:24,575 INFO L124 PetriNetUnfolderBase]: 2426/4291 cut-off events. [2024-06-27 17:56:24,575 INFO L125 PetriNetUnfolderBase]: For 192323/192323 co-relation queries the response was YES. [2024-06-27 17:56:24,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27592 conditions, 4291 events. 2426/4291 cut-off events. For 192323/192323 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27319 event pairs, 513 based on Foata normal form. 2/4041 useless extension candidates. Maximal degree in co-relation 27396. Up to 3672 conditions per place. [2024-06-27 17:56:24,622 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 373 selfloop transitions, 67 changer transitions 0/447 dead transitions. [2024-06-27 17:56:24,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 447 transitions, 6925 flow [2024-06-27 17:56:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-27 17:56:24,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40093240093240096 [2024-06-27 17:56:24,624 INFO L175 Difference]: Start difference. First operand has 400 places, 414 transitions, 5869 flow. Second operand 11 states and 172 transitions. [2024-06-27 17:56:24,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 447 transitions, 6925 flow [2024-06-27 17:56:25,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 447 transitions, 6651 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:25,705 INFO L231 Difference]: Finished difference. Result has 403 places, 416 transitions, 5808 flow [2024-06-27 17:56:25,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5808, PETRI_PLACES=403, PETRI_TRANSITIONS=416} [2024-06-27 17:56:25,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-27 17:56:25,706 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 416 transitions, 5808 flow [2024-06-27 17:56:25,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:25,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:25,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:25,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 17:56:25,706 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:25,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash -419163225, now seen corresponding path program 13 times [2024-06-27 17:56:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546232790] [2024-06-27 17:56:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546232790] [2024-06-27 17:56:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546232790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:29,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:29,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257191829] [2024-06-27 17:56:29,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:29,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 416 transitions, 5808 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:29,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:29,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:29,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:31,066 INFO L124 PetriNetUnfolderBase]: 2439/4310 cut-off events. [2024-06-27 17:56:31,066 INFO L125 PetriNetUnfolderBase]: For 192443/192443 co-relation queries the response was YES. [2024-06-27 17:56:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27430 conditions, 4310 events. 2439/4310 cut-off events. For 192443/192443 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27404 event pairs, 519 based on Foata normal form. 2/4057 useless extension candidates. Maximal degree in co-relation 27233. Up to 3740 conditions per place. [2024-06-27 17:56:31,122 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 379 selfloop transitions, 59 changer transitions 0/445 dead transitions. [2024-06-27 17:56:31,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 445 transitions, 6850 flow [2024-06-27 17:56:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:56:31,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:56:31,123 INFO L175 Difference]: Start difference. First operand has 403 places, 416 transitions, 5808 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:56:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 445 transitions, 6850 flow [2024-06-27 17:56:32,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 445 transitions, 6663 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:32,363 INFO L231 Difference]: Finished difference. Result has 404 places, 418 transitions, 5823 flow [2024-06-27 17:56:32,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5823, PETRI_PLACES=404, PETRI_TRANSITIONS=418} [2024-06-27 17:56:32,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 17:56:32,364 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 418 transitions, 5823 flow [2024-06-27 17:56:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:32,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:32,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 17:56:32,364 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:32,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1160796981, now seen corresponding path program 14 times [2024-06-27 17:56:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504770956] [2024-06-27 17:56:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:35,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:35,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504770956] [2024-06-27 17:56:35,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504770956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:35,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:56:35,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595934738] [2024-06-27 17:56:35,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:35,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:56:35,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:56:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:56:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:35,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 418 transitions, 5823 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:35,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:35,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:35,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:37,463 INFO L124 PetriNetUnfolderBase]: 2435/4304 cut-off events. [2024-06-27 17:56:37,464 INFO L125 PetriNetUnfolderBase]: For 181301/181301 co-relation queries the response was YES. [2024-06-27 17:56:37,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27015 conditions, 4304 events. 2435/4304 cut-off events. For 181301/181301 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27368 event pairs, 398 based on Foata normal form. 2/4051 useless extension candidates. Maximal degree in co-relation 26817. Up to 3020 conditions per place. [2024-06-27 17:56:37,523 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 255 selfloop transitions, 187 changer transitions 0/449 dead transitions. [2024-06-27 17:56:37,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 449 transitions, 6819 flow [2024-06-27 17:56:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 17:56:37,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2024-06-27 17:56:37,525 INFO L175 Difference]: Start difference. First operand has 404 places, 418 transitions, 5823 flow. Second operand 11 states and 173 transitions. [2024-06-27 17:56:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 449 transitions, 6819 flow [2024-06-27 17:56:38,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 449 transitions, 6614 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:38,780 INFO L231 Difference]: Finished difference. Result has 407 places, 419 transitions, 6010 flow [2024-06-27 17:56:38,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6010, PETRI_PLACES=407, PETRI_TRANSITIONS=419} [2024-06-27 17:56:38,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 17:56:38,780 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 419 transitions, 6010 flow [2024-06-27 17:56:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:38,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:38,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 17:56:38,781 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 818498391, now seen corresponding path program 15 times [2024-06-27 17:56:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436772246] [2024-06-27 17:56:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:42,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:42,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436772246] [2024-06-27 17:56:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436772246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:42,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:42,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238142434] [2024-06-27 17:56:42,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:42,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 419 transitions, 6010 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:42,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:42,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:42,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:44,691 INFO L124 PetriNetUnfolderBase]: 2448/4323 cut-off events. [2024-06-27 17:56:44,691 INFO L125 PetriNetUnfolderBase]: For 180580/180580 co-relation queries the response was YES. [2024-06-27 17:56:44,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27474 conditions, 4323 events. 2448/4323 cut-off events. For 180580/180580 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27479 event pairs, 426 based on Foata normal form. 2/4067 useless extension candidates. Maximal degree in co-relation 27275. Up to 3361 conditions per place. [2024-06-27 17:56:44,736 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 315 selfloop transitions, 130 changer transitions 0/452 dead transitions. [2024-06-27 17:56:44,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 452 transitions, 7048 flow [2024-06-27 17:56:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:56:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:56:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-27 17:56:44,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-06-27 17:56:44,737 INFO L175 Difference]: Start difference. First operand has 407 places, 419 transitions, 6010 flow. Second operand 11 states and 174 transitions. [2024-06-27 17:56:44,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 452 transitions, 7048 flow [2024-06-27 17:56:45,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 452 transitions, 6672 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:45,879 INFO L231 Difference]: Finished difference. Result has 409 places, 421 transitions, 5945 flow [2024-06-27 17:56:45,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5945, PETRI_PLACES=409, PETRI_TRANSITIONS=421} [2024-06-27 17:56:45,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-27 17:56:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 421 transitions, 5945 flow [2024-06-27 17:56:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:45,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:45,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 17:56:45,881 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash -419172153, now seen corresponding path program 17 times [2024-06-27 17:56:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127459881] [2024-06-27 17:56:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:48,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127459881] [2024-06-27 17:56:48,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127459881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:48,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:48,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686246236] [2024-06-27 17:56:48,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:48,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:48,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:49,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:49,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 421 transitions, 5945 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:49,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:49,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:49,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:50,589 INFO L124 PetriNetUnfolderBase]: 2464/4352 cut-off events. [2024-06-27 17:56:50,589 INFO L125 PetriNetUnfolderBase]: For 187367/187367 co-relation queries the response was YES. [2024-06-27 17:56:50,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27689 conditions, 4352 events. 2464/4352 cut-off events. For 187367/187367 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27776 event pairs, 526 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 27489. Up to 3789 conditions per place. [2024-06-27 17:56:50,640 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 387 selfloop transitions, 58 changer transitions 0/452 dead transitions. [2024-06-27 17:56:50,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 452 transitions, 7069 flow [2024-06-27 17:56:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:56:50,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 17:56:50,643 INFO L175 Difference]: Start difference. First operand has 409 places, 421 transitions, 5945 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:56:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 452 transitions, 7069 flow [2024-06-27 17:56:51,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 452 transitions, 6699 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 17:56:51,985 INFO L231 Difference]: Finished difference. Result has 410 places, 423 transitions, 5822 flow [2024-06-27 17:56:51,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5575, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5822, PETRI_PLACES=410, PETRI_TRANSITIONS=423} [2024-06-27 17:56:51,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 17:56:51,987 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 423 transitions, 5822 flow [2024-06-27 17:56:51,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:51,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:51,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 17:56:51,990 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:51,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash -427446363, now seen corresponding path program 18 times [2024-06-27 17:56:51,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:51,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444848189] [2024-06-27 17:56:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:56:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:56:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:56:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444848189] [2024-06-27 17:56:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444848189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:56:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:56:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:56:54,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392553757] [2024-06-27 17:56:54,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:56:54,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:56:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:56:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:56:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:56:54,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:56:54,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 423 transitions, 5822 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:54,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:56:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:56:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:56:56,255 INFO L124 PetriNetUnfolderBase]: 2484/4395 cut-off events. [2024-06-27 17:56:56,256 INFO L125 PetriNetUnfolderBase]: For 196571/196571 co-relation queries the response was YES. [2024-06-27 17:56:56,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27839 conditions, 4395 events. 2484/4395 cut-off events. For 196571/196571 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28140 event pairs, 533 based on Foata normal form. 2/4136 useless extension candidates. Maximal degree in co-relation 27638. Up to 3855 conditions per place. [2024-06-27 17:56:56,314 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 395 selfloop transitions, 52 changer transitions 0/454 dead transitions. [2024-06-27 17:56:56,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 454 transitions, 6952 flow [2024-06-27 17:56:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:56:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:56:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:56:56,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:56:56,316 INFO L175 Difference]: Start difference. First operand has 410 places, 423 transitions, 5822 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:56:56,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 454 transitions, 6952 flow [2024-06-27 17:56:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 454 transitions, 6721 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 17:56:57,772 INFO L231 Difference]: Finished difference. Result has 412 places, 424 transitions, 5751 flow [2024-06-27 17:56:57,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5751, PETRI_PLACES=412, PETRI_TRANSITIONS=424} [2024-06-27 17:56:57,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 17:56:57,772 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 424 transitions, 5751 flow [2024-06-27 17:56:57,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:56:57,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:56:57,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:56:57,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 17:56:57,773 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:56:57,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:56:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1094184581, now seen corresponding path program 16 times [2024-06-27 17:56:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:56:57,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728094702] [2024-06-27 17:56:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:56:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:56:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:01,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:01,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728094702] [2024-06-27 17:57:01,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728094702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:01,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:01,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425350208] [2024-06-27 17:57:01,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:01,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:01,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:01,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:01,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:01,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 424 transitions, 5751 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:01,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:01,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:01,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:02,878 INFO L124 PetriNetUnfolderBase]: 2480/4388 cut-off events. [2024-06-27 17:57:02,878 INFO L125 PetriNetUnfolderBase]: For 179707/179707 co-relation queries the response was YES. [2024-06-27 17:57:02,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27250 conditions, 4388 events. 2480/4388 cut-off events. For 179707/179707 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28046 event pairs, 441 based on Foata normal form. 2/4129 useless extension candidates. Maximal degree in co-relation 27048. Up to 3442 conditions per place. [2024-06-27 17:57:02,929 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 319 selfloop transitions, 127 changer transitions 0/453 dead transitions. [2024-06-27 17:57:02,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 453 transitions, 6743 flow [2024-06-27 17:57:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-27 17:57:02,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962703962703963 [2024-06-27 17:57:02,930 INFO L175 Difference]: Start difference. First operand has 412 places, 424 transitions, 5751 flow. Second operand 11 states and 170 transitions. [2024-06-27 17:57:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 453 transitions, 6743 flow [2024-06-27 17:57:04,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 453 transitions, 6587 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:04,303 INFO L231 Difference]: Finished difference. Result has 415 places, 424 transitions, 5854 flow [2024-06-27 17:57:04,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5854, PETRI_PLACES=415, PETRI_TRANSITIONS=424} [2024-06-27 17:57:04,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 17:57:04,304 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 424 transitions, 5854 flow [2024-06-27 17:57:04,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:04,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:04,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 17:57:04,305 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:04,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -427452873, now seen corresponding path program 19 times [2024-06-27 17:57:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797541191] [2024-06-27 17:57:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:07,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797541191] [2024-06-27 17:57:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797541191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:07,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842730304] [2024-06-27 17:57:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:07,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:07,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 424 transitions, 5854 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:07,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:07,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:07,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:09,044 INFO L124 PetriNetUnfolderBase]: 2496/4417 cut-off events. [2024-06-27 17:57:09,044 INFO L125 PetriNetUnfolderBase]: For 182887/182887 co-relation queries the response was YES. [2024-06-27 17:57:09,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27737 conditions, 4417 events. 2496/4417 cut-off events. For 182887/182887 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28289 event pairs, 534 based on Foata normal form. 2/4158 useless extension candidates. Maximal degree in co-relation 27534. Up to 3870 conditions per place. [2024-06-27 17:57:09,099 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 398 selfloop transitions, 53 changer transitions 0/458 dead transitions. [2024-06-27 17:57:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 458 transitions, 7106 flow [2024-06-27 17:57:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 17:57:09,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-06-27 17:57:09,101 INFO L175 Difference]: Start difference. First operand has 415 places, 424 transitions, 5854 flow. Second operand 10 states and 159 transitions. [2024-06-27 17:57:09,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 458 transitions, 7106 flow [2024-06-27 17:57:10,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 458 transitions, 6836 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 17:57:10,534 INFO L231 Difference]: Finished difference. Result has 416 places, 428 transitions, 5926 flow [2024-06-27 17:57:10,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5926, PETRI_PLACES=416, PETRI_TRANSITIONS=428} [2024-06-27 17:57:10,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 17:57:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 428 transitions, 5926 flow [2024-06-27 17:57:10,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:10,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:10,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:10,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 17:57:10,536 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:10,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -427206795, now seen corresponding path program 17 times [2024-06-27 17:57:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426827972] [2024-06-27 17:57:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:10,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:14,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:14,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426827972] [2024-06-27 17:57:14,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426827972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:14,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:14,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846612297] [2024-06-27 17:57:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:14,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:14,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:14,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 428 transitions, 5926 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:14,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:14,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:16,023 INFO L124 PetriNetUnfolderBase]: 2509/4436 cut-off events. [2024-06-27 17:57:16,024 INFO L125 PetriNetUnfolderBase]: For 190034/190034 co-relation queries the response was YES. [2024-06-27 17:57:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27759 conditions, 4436 events. 2509/4436 cut-off events. For 190034/190034 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28437 event pairs, 542 based on Foata normal form. 2/4173 useless extension candidates. Maximal degree in co-relation 27554. Up to 3894 conditions per place. [2024-06-27 17:57:16,085 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 397 selfloop transitions, 55 changer transitions 0/459 dead transitions. [2024-06-27 17:57:16,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 459 transitions, 7006 flow [2024-06-27 17:57:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 17:57:16,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916083916083916 [2024-06-27 17:57:16,086 INFO L175 Difference]: Start difference. First operand has 416 places, 428 transitions, 5926 flow. Second operand 11 states and 168 transitions. [2024-06-27 17:57:16,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 459 transitions, 7006 flow [2024-06-27 17:57:17,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 459 transitions, 6728 flow, removed 106 selfloop flow, removed 6 redundant places. [2024-06-27 17:57:17,463 INFO L231 Difference]: Finished difference. Result has 421 places, 430 transitions, 5845 flow [2024-06-27 17:57:17,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5845, PETRI_PLACES=421, PETRI_TRANSITIONS=430} [2024-06-27 17:57:17,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 17:57:17,464 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 430 transitions, 5845 flow [2024-06-27 17:57:17,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:17,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:17,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:17,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 17:57:17,464 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:17,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1714013913, now seen corresponding path program 18 times [2024-06-27 17:57:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644134094] [2024-06-27 17:57:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644134094] [2024-06-27 17:57:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644134094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:21,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:21,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122392621] [2024-06-27 17:57:21,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:21,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:21,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 430 transitions, 5845 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:21,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:21,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:21,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:23,540 INFO L124 PetriNetUnfolderBase]: 2522/4455 cut-off events. [2024-06-27 17:57:23,541 INFO L125 PetriNetUnfolderBase]: For 186998/186998 co-relation queries the response was YES. [2024-06-27 17:57:23,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27693 conditions, 4455 events. 2522/4455 cut-off events. For 186998/186998 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28551 event pairs, 488 based on Foata normal form. 2/4189 useless extension candidates. Maximal degree in co-relation 27486. Up to 3702 conditions per place. [2024-06-27 17:57:23,600 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 365 selfloop transitions, 91 changer transitions 0/463 dead transitions. [2024-06-27 17:57:23,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 463 transitions, 6945 flow [2024-06-27 17:57:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 173 transitions. [2024-06-27 17:57:23,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2024-06-27 17:57:23,602 INFO L175 Difference]: Start difference. First operand has 421 places, 430 transitions, 5845 flow. Second operand 11 states and 173 transitions. [2024-06-27 17:57:23,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 463 transitions, 6945 flow [2024-06-27 17:57:24,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 463 transitions, 6760 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:24,920 INFO L231 Difference]: Finished difference. Result has 423 places, 432 transitions, 5933 flow [2024-06-27 17:57:24,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5660, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5933, PETRI_PLACES=423, PETRI_TRANSITIONS=432} [2024-06-27 17:57:24,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-27 17:57:24,921 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 432 transitions, 5933 flow [2024-06-27 17:57:24,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:24,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:24,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:24,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 17:57:24,921 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:24,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:24,922 INFO L85 PathProgramCache]: Analyzing trace with hash -655347513, now seen corresponding path program 20 times [2024-06-27 17:57:24,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:24,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101726121] [2024-06-27 17:57:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:27,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:27,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101726121] [2024-06-27 17:57:27,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101726121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:27,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318128925] [2024-06-27 17:57:27,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:27,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:27,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:27,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 432 transitions, 5933 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:29,178 INFO L124 PetriNetUnfolderBase]: 2538/4483 cut-off events. [2024-06-27 17:57:29,178 INFO L125 PetriNetUnfolderBase]: For 193351/193351 co-relation queries the response was YES. [2024-06-27 17:57:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 4483 events. 2538/4483 cut-off events. For 193351/193351 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28742 event pairs, 558 based on Foata normal form. 2/4218 useless extension candidates. Maximal degree in co-relation 27937. Up to 3972 conditions per place. [2024-06-27 17:57:29,240 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 403 selfloop transitions, 50 changer transitions 0/460 dead transitions. [2024-06-27 17:57:29,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 460 transitions, 7073 flow [2024-06-27 17:57:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 17:57:29,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2024-06-27 17:57:29,241 INFO L175 Difference]: Start difference. First operand has 423 places, 432 transitions, 5933 flow. Second operand 10 states and 153 transitions. [2024-06-27 17:57:29,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 460 transitions, 7073 flow [2024-06-27 17:57:30,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 460 transitions, 6826 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:30,828 INFO L231 Difference]: Finished difference. Result has 424 places, 434 transitions, 5927 flow [2024-06-27 17:57:30,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5686, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5927, PETRI_PLACES=424, PETRI_TRANSITIONS=434} [2024-06-27 17:57:30,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-27 17:57:30,829 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 434 transitions, 5927 flow [2024-06-27 17:57:30,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:30,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:30,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 17:57:30,830 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:30,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash -655354023, now seen corresponding path program 21 times [2024-06-27 17:57:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:30,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85042589] [2024-06-27 17:57:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85042589] [2024-06-27 17:57:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85042589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:33,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:33,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:33,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452125880] [2024-06-27 17:57:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:33,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:33,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:33,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:33,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 434 transitions, 5927 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:33,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:33,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:33,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:35,033 INFO L124 PetriNetUnfolderBase]: 2562/4539 cut-off events. [2024-06-27 17:57:35,034 INFO L125 PetriNetUnfolderBase]: For 203188/203188 co-relation queries the response was YES. [2024-06-27 17:57:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28564 conditions, 4539 events. 2562/4539 cut-off events. For 203188/203188 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 29304 event pairs, 560 based on Foata normal form. 2/4270 useless extension candidates. Maximal degree in co-relation 28355. Up to 3987 conditions per place. [2024-06-27 17:57:35,094 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 411 selfloop transitions, 49 changer transitions 0/467 dead transitions. [2024-06-27 17:57:35,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 467 transitions, 7147 flow [2024-06-27 17:57:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:57:35,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025641025641026 [2024-06-27 17:57:35,096 INFO L175 Difference]: Start difference. First operand has 424 places, 434 transitions, 5927 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:57:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 467 transitions, 7147 flow [2024-06-27 17:57:36,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 467 transitions, 6922 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:36,576 INFO L231 Difference]: Finished difference. Result has 427 places, 436 transitions, 5906 flow [2024-06-27 17:57:36,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5906, PETRI_PLACES=427, PETRI_TRANSITIONS=436} [2024-06-27 17:57:36,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-27 17:57:36,577 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 436 transitions, 5906 flow [2024-06-27 17:57:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:36,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:36,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:36,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 17:57:36,577 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:36,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -648851835, now seen corresponding path program 19 times [2024-06-27 17:57:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:36,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426967182] [2024-06-27 17:57:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:39,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426967182] [2024-06-27 17:57:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426967182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:39,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:39,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297579269] [2024-06-27 17:57:39,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:39,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:39,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:39,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:39,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 436 transitions, 5906 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:39,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:39,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:39,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:41,699 INFO L124 PetriNetUnfolderBase]: 2575/4559 cut-off events. [2024-06-27 17:57:41,699 INFO L125 PetriNetUnfolderBase]: For 202648/202648 co-relation queries the response was YES. [2024-06-27 17:57:41,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28542 conditions, 4559 events. 2575/4559 cut-off events. For 202648/202648 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29379 event pairs, 570 based on Foata normal form. 2/4285 useless extension candidates. Maximal degree in co-relation 28331. Up to 4027 conditions per place. [2024-06-27 17:57:41,764 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 406 selfloop transitions, 52 changer transitions 0/465 dead transitions. [2024-06-27 17:57:41,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 465 transitions, 7000 flow [2024-06-27 17:57:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:57:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:57:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-27 17:57:41,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822843822843823 [2024-06-27 17:57:41,766 INFO L175 Difference]: Start difference. First operand has 427 places, 436 transitions, 5906 flow. Second operand 11 states and 164 transitions. [2024-06-27 17:57:41,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 465 transitions, 7000 flow [2024-06-27 17:57:43,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 465 transitions, 6840 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 17:57:43,301 INFO L231 Difference]: Finished difference. Result has 431 places, 438 transitions, 5945 flow [2024-06-27 17:57:43,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5945, PETRI_PLACES=431, PETRI_TRANSITIONS=438} [2024-06-27 17:57:43,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 17:57:43,301 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 438 transitions, 5945 flow [2024-06-27 17:57:43,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:43,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:43,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 17:57:43,302 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:43,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash -316540375, now seen corresponding path program 22 times [2024-06-27 17:57:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495187987] [2024-06-27 17:57:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:43,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495187987] [2024-06-27 17:57:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495187987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931160488] [2024-06-27 17:57:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:46,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:46,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 438 transitions, 5945 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:46,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:46,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:46,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:47,847 INFO L124 PetriNetUnfolderBase]: 2595/4601 cut-off events. [2024-06-27 17:57:47,848 INFO L125 PetriNetUnfolderBase]: For 206762/206762 co-relation queries the response was YES. [2024-06-27 17:57:47,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28890 conditions, 4601 events. 2595/4601 cut-off events. For 206762/206762 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29740 event pairs, 521 based on Foata normal form. 2/4326 useless extension candidates. Maximal degree in co-relation 28678. Up to 3867 conditions per place. [2024-06-27 17:57:47,907 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 380 selfloop transitions, 83 changer transitions 0/470 dead transitions. [2024-06-27 17:57:47,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 470 transitions, 7123 flow [2024-06-27 17:57:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 17:57:47,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128205128205128 [2024-06-27 17:57:47,908 INFO L175 Difference]: Start difference. First operand has 431 places, 438 transitions, 5945 flow. Second operand 10 states and 161 transitions. [2024-06-27 17:57:47,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 470 transitions, 7123 flow [2024-06-27 17:57:49,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 470 transitions, 6950 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 17:57:49,558 INFO L231 Difference]: Finished difference. Result has 432 places, 439 transitions, 6002 flow [2024-06-27 17:57:49,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5772, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=432, PETRI_TRANSITIONS=439} [2024-06-27 17:57:49,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 17:57:49,559 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 439 transitions, 6002 flow [2024-06-27 17:57:49,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:49,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:49,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 17:57:49,560 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:49,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash -655527003, now seen corresponding path program 23 times [2024-06-27 17:57:49,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:49,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558683845] [2024-06-27 17:57:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:52,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558683845] [2024-06-27 17:57:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558683845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:52,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:52,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:57:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127524275] [2024-06-27 17:57:52,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:52,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:57:52,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:57:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:57:52,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:52,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 439 transitions, 6002 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:52,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:52,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:52,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:57:53,917 INFO L124 PetriNetUnfolderBase]: 2619/4658 cut-off events. [2024-06-27 17:57:53,917 INFO L125 PetriNetUnfolderBase]: For 216858/216858 co-relation queries the response was YES. [2024-06-27 17:57:53,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 4658 events. 2619/4658 cut-off events. For 216858/216858 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30297 event pairs, 565 based on Foata normal form. 2/4378 useless extension candidates. Maximal degree in co-relation 29400. Up to 4078 conditions per place. [2024-06-27 17:57:53,977 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 417 selfloop transitions, 49 changer transitions 0/473 dead transitions. [2024-06-27 17:57:53,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 473 transitions, 7246 flow [2024-06-27 17:57:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:57:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:57:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 17:57:53,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40512820512820513 [2024-06-27 17:57:53,979 INFO L175 Difference]: Start difference. First operand has 432 places, 439 transitions, 6002 flow. Second operand 10 states and 158 transitions. [2024-06-27 17:57:53,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 473 transitions, 7246 flow [2024-06-27 17:57:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 473 transitions, 7046 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 17:57:55,463 INFO L231 Difference]: Finished difference. Result has 435 places, 441 transitions, 6012 flow [2024-06-27 17:57:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5802, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6012, PETRI_PLACES=435, PETRI_TRANSITIONS=441} [2024-06-27 17:57:55,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 17:57:55,484 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 441 transitions, 6012 flow [2024-06-27 17:57:55,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:55,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:57:55,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:57:55,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 17:57:55,485 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:57:55,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:57:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -291213985, now seen corresponding path program 20 times [2024-06-27 17:57:55,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:57:55,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325709777] [2024-06-27 17:57:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:57:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:57:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:57:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:57:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:57:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325709777] [2024-06-27 17:57:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325709777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:57:59,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:57:59,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:57:59,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740266948] [2024-06-27 17:57:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:57:59,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:57:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:57:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:57:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:57:59,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:57:59,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 441 transitions, 6012 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:57:59,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:57:59,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:57:59,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:01,636 INFO L124 PetriNetUnfolderBase]: 2632/4677 cut-off events. [2024-06-27 17:58:01,636 INFO L125 PetriNetUnfolderBase]: For 216693/216693 co-relation queries the response was YES. [2024-06-27 17:58:01,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29557 conditions, 4677 events. 2632/4677 cut-off events. For 216693/216693 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30434 event pairs, 525 based on Foata normal form. 2/4393 useless extension candidates. Maximal degree in co-relation 29342. Up to 3928 conditions per place. [2024-06-27 17:58:01,704 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 380 selfloop transitions, 86 changer transitions 0/473 dead transitions. [2024-06-27 17:58:01,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 473 transitions, 7136 flow [2024-06-27 17:58:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:58:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:58:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-27 17:58:01,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3986013986013986 [2024-06-27 17:58:01,706 INFO L175 Difference]: Start difference. First operand has 435 places, 441 transitions, 6012 flow. Second operand 11 states and 171 transitions. [2024-06-27 17:58:01,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 473 transitions, 7136 flow [2024-06-27 17:58:03,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 473 transitions, 6970 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:03,483 INFO L231 Difference]: Finished difference. Result has 439 places, 443 transitions, 6117 flow [2024-06-27 17:58:03,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6117, PETRI_PLACES=439, PETRI_TRANSITIONS=443} [2024-06-27 17:58:03,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-27 17:58:03,484 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 443 transitions, 6117 flow [2024-06-27 17:58:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:03,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:03,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:03,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 17:58:03,484 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:03,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1722585351, now seen corresponding path program 24 times [2024-06-27 17:58:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381152274] [2024-06-27 17:58:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:06,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381152274] [2024-06-27 17:58:06,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381152274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:06,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:06,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:58:06,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108092163] [2024-06-27 17:58:06,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:06,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:58:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:58:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:58:06,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:06,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 443 transitions, 6117 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:06,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:06,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:06,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:08,177 INFO L124 PetriNetUnfolderBase]: 2652/4719 cut-off events. [2024-06-27 17:58:08,177 INFO L125 PetriNetUnfolderBase]: For 221022/221022 co-relation queries the response was YES. [2024-06-27 17:58:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30049 conditions, 4719 events. 2652/4719 cut-off events. For 221022/221022 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30750 event pairs, 541 based on Foata normal form. 2/4434 useless extension candidates. Maximal degree in co-relation 29833. Up to 3989 conditions per place. [2024-06-27 17:58:08,239 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 386 selfloop transitions, 80 changer transitions 0/473 dead transitions. [2024-06-27 17:58:08,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 473 transitions, 7299 flow [2024-06-27 17:58:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 17:58:08,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025641025641026 [2024-06-27 17:58:08,240 INFO L175 Difference]: Start difference. First operand has 439 places, 443 transitions, 6117 flow. Second operand 10 states and 157 transitions. [2024-06-27 17:58:08,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 473 transitions, 7299 flow [2024-06-27 17:58:10,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 473 transitions, 7054 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:10,028 INFO L231 Difference]: Finished difference. Result has 440 places, 444 transitions, 6100 flow [2024-06-27 17:58:10,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6100, PETRI_PLACES=440, PETRI_TRANSITIONS=444} [2024-06-27 17:58:10,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-27 17:58:10,029 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 444 transitions, 6100 flow [2024-06-27 17:58:10,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:10,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:10,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:10,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 17:58:10,030 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:10,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1547494851, now seen corresponding path program 21 times [2024-06-27 17:58:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:10,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027321584] [2024-06-27 17:58:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:10,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:13,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:13,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027321584] [2024-06-27 17:58:13,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027321584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:13,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:13,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594182587] [2024-06-27 17:58:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:13,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:13,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 444 transitions, 6100 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:13,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:13,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:15,837 INFO L124 PetriNetUnfolderBase]: 2648/4713 cut-off events. [2024-06-27 17:58:15,837 INFO L125 PetriNetUnfolderBase]: For 205793/205793 co-relation queries the response was YES. [2024-06-27 17:58:15,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29529 conditions, 4713 events. 2648/4713 cut-off events. For 205793/205793 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30751 event pairs, 541 based on Foata normal form. 2/4427 useless extension candidates. Maximal degree in co-relation 29312. Up to 3981 conditions per place. [2024-06-27 17:58:15,905 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 382 selfloop transitions, 83 changer transitions 0/472 dead transitions. [2024-06-27 17:58:15,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 472 transitions, 7126 flow [2024-06-27 17:58:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:58:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:58:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-27 17:58:15,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38927738927738925 [2024-06-27 17:58:15,906 INFO L175 Difference]: Start difference. First operand has 440 places, 444 transitions, 6100 flow. Second operand 11 states and 167 transitions. [2024-06-27 17:58:15,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 472 transitions, 7126 flow [2024-06-27 17:58:17,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 472 transitions, 6910 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:17,663 INFO L231 Difference]: Finished difference. Result has 443 places, 444 transitions, 6055 flow [2024-06-27 17:58:17,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6055, PETRI_PLACES=443, PETRI_TRANSITIONS=444} [2024-06-27 17:58:17,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-27 17:58:17,664 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 444 transitions, 6055 flow [2024-06-27 17:58:17,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:17,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:17,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:17,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 17:58:17,665 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:17,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1722591861, now seen corresponding path program 25 times [2024-06-27 17:58:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829770278] [2024-06-27 17:58:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:17,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:20,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829770278] [2024-06-27 17:58:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829770278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:20,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:20,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 17:58:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405692307] [2024-06-27 17:58:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:58:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:20,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:58:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:58:20,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:20,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 444 transitions, 6055 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:20,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:20,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:20,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:22,354 INFO L124 PetriNetUnfolderBase]: 2656/4741 cut-off events. [2024-06-27 17:58:22,354 INFO L125 PetriNetUnfolderBase]: For 189199/189199 co-relation queries the response was YES. [2024-06-27 17:58:22,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29276 conditions, 4741 events. 2656/4741 cut-off events. For 189199/189199 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31041 event pairs, 535 based on Foata normal form. 2/4452 useless extension candidates. Maximal degree in co-relation 29058. Up to 3976 conditions per place. [2024-06-27 17:58:22,415 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 391 selfloop transitions, 80 changer transitions 0/478 dead transitions. [2024-06-27 17:58:22,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 478 transitions, 7313 flow [2024-06-27 17:58:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:58:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:58:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 17:58:22,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-27 17:58:22,417 INFO L175 Difference]: Start difference. First operand has 443 places, 444 transitions, 6055 flow. Second operand 10 states and 160 transitions. [2024-06-27 17:58:22,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 478 transitions, 7313 flow [2024-06-27 17:58:24,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 478 transitions, 7077 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-27 17:58:24,222 INFO L231 Difference]: Finished difference. Result has 444 places, 446 transitions, 6097 flow [2024-06-27 17:58:24,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6097, PETRI_PLACES=444, PETRI_TRANSITIONS=446} [2024-06-27 17:58:24,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 17:58:24,223 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 446 transitions, 6097 flow [2024-06-27 17:58:24,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:24,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 17:58:24,223 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:24,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1966271160, now seen corresponding path program 1 times [2024-06-27 17:58:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527075185] [2024-06-27 17:58:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:27,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527075185] [2024-06-27 17:58:27,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527075185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:58:27,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129686297] [2024-06-27 17:58:27,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:58:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:58:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:58:27,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:27,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 446 transitions, 6097 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:27,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:27,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,471 INFO L124 PetriNetUnfolderBase]: 2728/4869 cut-off events. [2024-06-27 17:58:29,471 INFO L125 PetriNetUnfolderBase]: For 192644/192644 co-relation queries the response was YES. [2024-06-27 17:58:29,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30215 conditions, 4869 events. 2728/4869 cut-off events. For 192644/192644 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31889 event pairs, 702 based on Foata normal form. 2/4570 useless extension candidates. Maximal degree in co-relation 29996. Up to 4380 conditions per place. [2024-06-27 17:58:29,529 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 446 selfloop transitions, 45 changer transitions 0/498 dead transitions. [2024-06-27 17:58:29,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 498 transitions, 7619 flow [2024-06-27 17:58:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-27 17:58:29,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38675213675213677 [2024-06-27 17:58:29,531 INFO L175 Difference]: Start difference. First operand has 444 places, 446 transitions, 6097 flow. Second operand 12 states and 181 transitions. [2024-06-27 17:58:29,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 498 transitions, 7619 flow [2024-06-27 17:58:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 498 transitions, 7355 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:31,383 INFO L231 Difference]: Finished difference. Result has 452 places, 464 transitions, 6402 flow [2024-06-27 17:58:31,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6402, PETRI_PLACES=452, PETRI_TRANSITIONS=464} [2024-06-27 17:58:31,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-27 17:58:31,384 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 464 transitions, 6402 flow [2024-06-27 17:58:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:31,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:31,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 17:58:31,385 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:31,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -579364018, now seen corresponding path program 2 times [2024-06-27 17:58:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15015987] [2024-06-27 17:58:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15015987] [2024-06-27 17:58:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15015987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:34,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:58:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649354618] [2024-06-27 17:58:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:58:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:58:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:58:34,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:34,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 464 transitions, 6402 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:34,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:34,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:34,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:36,381 INFO L124 PetriNetUnfolderBase]: 2768/4948 cut-off events. [2024-06-27 17:58:36,381 INFO L125 PetriNetUnfolderBase]: For 192906/192906 co-relation queries the response was YES. [2024-06-27 17:58:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30460 conditions, 4948 events. 2768/4948 cut-off events. For 192906/192906 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32600 event pairs, 706 based on Foata normal form. 2/4646 useless extension candidates. Maximal degree in co-relation 30237. Up to 4428 conditions per place. [2024-06-27 17:58:36,455 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 457 selfloop transitions, 42 changer transitions 0/506 dead transitions. [2024-06-27 17:58:36,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 506 transitions, 7759 flow [2024-06-27 17:58:36,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-27 17:58:36,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952991452991453 [2024-06-27 17:58:36,456 INFO L175 Difference]: Start difference. First operand has 452 places, 464 transitions, 6402 flow. Second operand 12 states and 185 transitions. [2024-06-27 17:58:36,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 506 transitions, 7759 flow [2024-06-27 17:58:38,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 506 transitions, 7591 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:38,465 INFO L231 Difference]: Finished difference. Result has 459 places, 467 transitions, 6458 flow [2024-06-27 17:58:38,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6458, PETRI_PLACES=459, PETRI_TRANSITIONS=467} [2024-06-27 17:58:38,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 17:58:38,487 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 467 transitions, 6458 flow [2024-06-27 17:58:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:38,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:38,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:38,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 17:58:38,488 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:38,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:38,489 INFO L85 PathProgramCache]: Analyzing trace with hash -137676112, now seen corresponding path program 3 times [2024-06-27 17:58:38,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:38,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33994840] [2024-06-27 17:58:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:41,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:41,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33994840] [2024-06-27 17:58:41,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33994840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:41,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:41,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 17:58:41,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310822637] [2024-06-27 17:58:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:58:41,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:58:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:58:41,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:41,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 467 transitions, 6458 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:41,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:41,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:41,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:43,586 INFO L124 PetriNetUnfolderBase]: 2828/5075 cut-off events. [2024-06-27 17:58:43,587 INFO L125 PetriNetUnfolderBase]: For 201065/201065 co-relation queries the response was YES. [2024-06-27 17:58:43,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31238 conditions, 5075 events. 2828/5075 cut-off events. For 201065/201065 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33834 event pairs, 724 based on Foata normal form. 2/4766 useless extension candidates. Maximal degree in co-relation 31013. Up to 4516 conditions per place. [2024-06-27 17:58:43,660 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 468 selfloop transitions, 40 changer transitions 0/515 dead transitions. [2024-06-27 17:58:43,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 515 transitions, 7881 flow [2024-06-27 17:58:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 17:58:43,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 17:58:43,661 INFO L175 Difference]: Start difference. First operand has 459 places, 467 transitions, 6458 flow. Second operand 12 states and 188 transitions. [2024-06-27 17:58:43,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 515 transitions, 7881 flow [2024-06-27 17:58:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 515 transitions, 7693 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:45,509 INFO L231 Difference]: Finished difference. Result has 464 places, 472 transitions, 6518 flow [2024-06-27 17:58:45,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6270, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6518, PETRI_PLACES=464, PETRI_TRANSITIONS=472} [2024-06-27 17:58:45,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 17:58:45,510 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 472 transitions, 6518 flow [2024-06-27 17:58:45,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:45,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:45,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 17:58:45,511 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:45,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:45,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1901085512, now seen corresponding path program 4 times [2024-06-27 17:58:45,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:45,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34452318] [2024-06-27 17:58:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:45,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34452318] [2024-06-27 17:58:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34452318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:48,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:48,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:58:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879324825] [2024-06-27 17:58:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:58:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:58:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:58:48,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:48,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 472 transitions, 6518 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:48,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:48,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:48,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:50,463 INFO L124 PetriNetUnfolderBase]: 2901/5219 cut-off events. [2024-06-27 17:58:50,463 INFO L125 PetriNetUnfolderBase]: For 209501/209501 co-relation queries the response was YES. [2024-06-27 17:58:50,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32095 conditions, 5219 events. 2901/5219 cut-off events. For 209501/209501 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35066 event pairs, 752 based on Foata normal form. 2/4905 useless extension candidates. Maximal degree in co-relation 31867. Up to 4642 conditions per place. [2024-06-27 17:58:50,538 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 478 selfloop transitions, 39 changer transitions 0/524 dead transitions. [2024-06-27 17:58:50,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 524 transitions, 7993 flow [2024-06-27 17:58:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 17:58:50,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 17:58:50,540 INFO L175 Difference]: Start difference. First operand has 464 places, 472 transitions, 6518 flow. Second operand 12 states and 189 transitions. [2024-06-27 17:58:50,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 524 transitions, 7993 flow [2024-06-27 17:58:52,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 524 transitions, 7809 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:52,567 INFO L231 Difference]: Finished difference. Result has 471 places, 480 transitions, 6699 flow [2024-06-27 17:58:52,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6699, PETRI_PLACES=471, PETRI_TRANSITIONS=480} [2024-06-27 17:58:52,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-27 17:58:52,568 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 480 transitions, 6699 flow [2024-06-27 17:58:52,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:52,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:52,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:52,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 17:58:52,569 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:58:52,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -684452454, now seen corresponding path program 5 times [2024-06-27 17:58:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:52,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238991790] [2024-06-27 17:58:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:52,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238991790] [2024-06-27 17:58:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238991790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:58:55,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434502478] [2024-06-27 17:58:55,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:55,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:58:55,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:58:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:58:55,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:58:55,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 480 transitions, 6699 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:55,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:55,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:58:55,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:58,098 INFO L124 PetriNetUnfolderBase]: 2961/5340 cut-off events. [2024-06-27 17:58:58,098 INFO L125 PetriNetUnfolderBase]: For 217845/217845 co-relation queries the response was YES. [2024-06-27 17:58:58,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32863 conditions, 5340 events. 2961/5340 cut-off events. For 217845/217845 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36234 event pairs, 774 based on Foata normal form. 2/5020 useless extension candidates. Maximal degree in co-relation 32631. Up to 4741 conditions per place. [2024-06-27 17:58:58,168 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 489 selfloop transitions, 37 changer transitions 0/533 dead transitions. [2024-06-27 17:58:58,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 533 transitions, 8168 flow [2024-06-27 17:58:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:58:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:58:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 17:58:58,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081196581196581 [2024-06-27 17:58:58,170 INFO L175 Difference]: Start difference. First operand has 471 places, 480 transitions, 6699 flow. Second operand 12 states and 191 transitions. [2024-06-27 17:58:58,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 533 transitions, 8168 flow [2024-06-27 17:59:00,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 533 transitions, 7885 flow, removed 110 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:00,406 INFO L231 Difference]: Finished difference. Result has 479 places, 487 transitions, 6738 flow [2024-06-27 17:59:00,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6738, PETRI_PLACES=479, PETRI_TRANSITIONS=487} [2024-06-27 17:59:00,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-27 17:59:00,406 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 487 transitions, 6738 flow [2024-06-27 17:59:00,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:00,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:00,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 17:59:00,407 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:00,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1694749888, now seen corresponding path program 1 times [2024-06-27 17:59:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:00,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126061642] [2024-06-27 17:59:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:04,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126061642] [2024-06-27 17:59:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126061642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:04,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684567255] [2024-06-27 17:59:04,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:04,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:04,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 487 transitions, 6738 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:06,953 INFO L124 PetriNetUnfolderBase]: 3042/5487 cut-off events. [2024-06-27 17:59:06,954 INFO L125 PetriNetUnfolderBase]: For 297588/297588 co-relation queries the response was YES. [2024-06-27 17:59:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33541 conditions, 5487 events. 3042/5487 cut-off events. For 297588/297588 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37425 event pairs, 861 based on Foata normal form. 10/5175 useless extension candidates. Maximal degree in co-relation 33305. Up to 4821 conditions per place. [2024-06-27 17:59:07,037 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 478 selfloop transitions, 46 changer transitions 0/531 dead transitions. [2024-06-27 17:59:07,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 531 transitions, 8063 flow [2024-06-27 17:59:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:59:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:59:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-27 17:59:07,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.388560157790927 [2024-06-27 17:59:07,039 INFO L175 Difference]: Start difference. First operand has 479 places, 487 transitions, 6738 flow. Second operand 13 states and 197 transitions. [2024-06-27 17:59:07,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 531 transitions, 8063 flow [2024-06-27 17:59:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 531 transitions, 7817 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-27 17:59:09,576 INFO L231 Difference]: Finished difference. Result has 486 places, 490 transitions, 6713 flow [2024-06-27 17:59:09,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6713, PETRI_PLACES=486, PETRI_TRANSITIONS=490} [2024-06-27 17:59:09,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-27 17:59:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 490 transitions, 6713 flow [2024-06-27 17:59:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 17:59:09,577 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:09,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1976429734, now seen corresponding path program 6 times [2024-06-27 17:59:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453089745] [2024-06-27 17:59:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453089745] [2024-06-27 17:59:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453089745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:13,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410652359] [2024-06-27 17:59:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:13,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:13,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:13,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 490 transitions, 6713 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:13,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:13,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:13,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:15,374 INFO L124 PetriNetUnfolderBase]: 3062/5532 cut-off events. [2024-06-27 17:59:15,374 INFO L125 PetriNetUnfolderBase]: For 229344/229344 co-relation queries the response was YES. [2024-06-27 17:59:15,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33695 conditions, 5532 events. 3062/5532 cut-off events. For 229344/229344 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37901 event pairs, 817 based on Foata normal form. 2/5208 useless extension candidates. Maximal degree in co-relation 33457. Up to 4668 conditions per place. [2024-06-27 17:59:15,467 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 405 selfloop transitions, 119 changer transitions 0/531 dead transitions. [2024-06-27 17:59:15,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 531 transitions, 8047 flow [2024-06-27 17:59:15,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:59:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:59:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 17:59:15,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 17:59:15,468 INFO L175 Difference]: Start difference. First operand has 486 places, 490 transitions, 6713 flow. Second operand 12 states and 189 transitions. [2024-06-27 17:59:15,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 531 transitions, 8047 flow [2024-06-27 17:59:17,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 531 transitions, 7876 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-27 17:59:17,951 INFO L231 Difference]: Finished difference. Result has 489 places, 492 transitions, 6884 flow [2024-06-27 17:59:17,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6884, PETRI_PLACES=489, PETRI_TRANSITIONS=492} [2024-06-27 17:59:17,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-27 17:59:17,952 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 492 transitions, 6884 flow [2024-06-27 17:59:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:17,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:17,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 17:59:17,952 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:17,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1646366592, now seen corresponding path program 2 times [2024-06-27 17:59:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141038179] [2024-06-27 17:59:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141038179] [2024-06-27 17:59:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141038179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:21,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693762885] [2024-06-27 17:59:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:21,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:21,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 492 transitions, 6884 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:21,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:21,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:21,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:24,089 INFO L124 PetriNetUnfolderBase]: 3231/5934 cut-off events. [2024-06-27 17:59:24,090 INFO L125 PetriNetUnfolderBase]: For 388525/388525 co-relation queries the response was YES. [2024-06-27 17:59:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37124 conditions, 5934 events. 3231/5934 cut-off events. For 388525/388525 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41663 event pairs, 868 based on Foata normal form. 8/5597 useless extension candidates. Maximal degree in co-relation 36884. Up to 4255 conditions per place. [2024-06-27 17:59:24,183 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 407 selfloop transitions, 135 changer transitions 0/549 dead transitions. [2024-06-27 17:59:24,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 549 transitions, 8699 flow [2024-06-27 17:59:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:59:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:59:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 215 transitions. [2024-06-27 17:59:24,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4240631163708087 [2024-06-27 17:59:24,185 INFO L175 Difference]: Start difference. First operand has 489 places, 492 transitions, 6884 flow. Second operand 13 states and 215 transitions. [2024-06-27 17:59:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 549 transitions, 8699 flow [2024-06-27 17:59:27,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 549 transitions, 8480 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:27,535 INFO L231 Difference]: Finished difference. Result has 494 places, 493 transitions, 7009 flow [2024-06-27 17:59:27,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7009, PETRI_PLACES=494, PETRI_TRANSITIONS=493} [2024-06-27 17:59:27,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-27 17:59:27,536 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 493 transitions, 7009 flow [2024-06-27 17:59:27,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:27,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:27,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 17:59:27,536 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:27,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1976756784, now seen corresponding path program 3 times [2024-06-27 17:59:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:27,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137778215] [2024-06-27 17:59:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:32,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137778215] [2024-06-27 17:59:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137778215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:32,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639107379] [2024-06-27 17:59:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:32,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:32,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:32,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:32,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 493 transitions, 7009 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:32,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:32,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:32,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:35,491 INFO L124 PetriNetUnfolderBase]: 3315/6130 cut-off events. [2024-06-27 17:59:35,491 INFO L125 PetriNetUnfolderBase]: For 420990/420990 co-relation queries the response was YES. [2024-06-27 17:59:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38244 conditions, 6130 events. 3315/6130 cut-off events. For 420990/420990 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43623 event pairs, 970 based on Foata normal form. 10/5777 useless extension candidates. Maximal degree in co-relation 38002. Up to 4862 conditions per place. [2024-06-27 17:59:35,582 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 397 selfloop transitions, 139 changer transitions 0/543 dead transitions. [2024-06-27 17:59:35,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 543 transitions, 8364 flow [2024-06-27 17:59:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:59:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:59:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 221 transitions. [2024-06-27 17:59:35,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 17:59:35,584 INFO L175 Difference]: Start difference. First operand has 494 places, 493 transitions, 7009 flow. Second operand 14 states and 221 transitions. [2024-06-27 17:59:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 543 transitions, 8364 flow [2024-06-27 17:59:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 543 transitions, 8146 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 17:59:38,888 INFO L231 Difference]: Finished difference. Result has 499 places, 493 transitions, 7076 flow [2024-06-27 17:59:38,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7076, PETRI_PLACES=499, PETRI_TRANSITIONS=493} [2024-06-27 17:59:38,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-27 17:59:38,889 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 493 transitions, 7076 flow [2024-06-27 17:59:38,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:38,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:38,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:38,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 17:59:38,889 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:38,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:38,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1710732454, now seen corresponding path program 7 times [2024-06-27 17:59:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:38,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298014118] [2024-06-27 17:59:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:38,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298014118] [2024-06-27 17:59:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298014118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:42,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:42,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226566035] [2024-06-27 17:59:42,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:42,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:42,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:42,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:42,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:42,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 493 transitions, 7076 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:42,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:42,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:42,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:44,805 INFO L124 PetriNetUnfolderBase]: 3331/6160 cut-off events. [2024-06-27 17:59:44,806 INFO L125 PetriNetUnfolderBase]: For 354674/354674 co-relation queries the response was YES. [2024-06-27 17:59:44,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38873 conditions, 6160 events. 3331/6160 cut-off events. For 354674/354674 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43930 event pairs, 1003 based on Foata normal form. 2/5795 useless extension candidates. Maximal degree in co-relation 38630. Up to 5385 conditions per place. [2024-06-27 17:59:44,903 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 449 selfloop transitions, 74 changer transitions 0/530 dead transitions. [2024-06-27 17:59:44,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 530 transitions, 8387 flow [2024-06-27 17:59:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:59:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:59:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 184 transitions. [2024-06-27 17:59:44,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2024-06-27 17:59:44,904 INFO L175 Difference]: Start difference. First operand has 499 places, 493 transitions, 7076 flow. Second operand 12 states and 184 transitions. [2024-06-27 17:59:44,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 530 transitions, 8387 flow [2024-06-27 17:59:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 530 transitions, 8101 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-27 17:59:48,463 INFO L231 Difference]: Finished difference. Result has 498 places, 495 transitions, 7082 flow [2024-06-27 17:59:48,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7082, PETRI_PLACES=498, PETRI_TRANSITIONS=495} [2024-06-27 17:59:48,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-27 17:59:48,463 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 495 transitions, 7082 flow [2024-06-27 17:59:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:48,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:48,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:48,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 17:59:48,464 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:48,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1967232964, now seen corresponding path program 8 times [2024-06-27 17:59:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:48,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162779206] [2024-06-27 17:59:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:59:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:59:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:59:51,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162779206] [2024-06-27 17:59:51,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162779206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:59:51,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:59:51,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 17:59:51,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614342815] [2024-06-27 17:59:51,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:59:51,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:59:51,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:59:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:59:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:59:51,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 17:59:51,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 495 transitions, 7082 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:51,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:59:51,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 17:59:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:59:54,205 INFO L124 PetriNetUnfolderBase]: 3347/6188 cut-off events. [2024-06-27 17:59:54,206 INFO L125 PetriNetUnfolderBase]: For 365689/365689 co-relation queries the response was YES. [2024-06-27 17:59:54,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39164 conditions, 6188 events. 3347/6188 cut-off events. For 365689/365689 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44145 event pairs, 1007 based on Foata normal form. 2/5823 useless extension candidates. Maximal degree in co-relation 38920. Up to 5327 conditions per place. [2024-06-27 17:59:54,306 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 432 selfloop transitions, 94 changer transitions 0/533 dead transitions. [2024-06-27 17:59:54,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 533 transitions, 8407 flow [2024-06-27 17:59:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:59:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:59:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 17:59:54,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 17:59:54,308 INFO L175 Difference]: Start difference. First operand has 498 places, 495 transitions, 7082 flow. Second operand 12 states and 186 transitions. [2024-06-27 17:59:54,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 533 transitions, 8407 flow [2024-06-27 17:59:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 533 transitions, 8133 flow, removed 65 selfloop flow, removed 10 redundant places. [2024-06-27 17:59:57,648 INFO L231 Difference]: Finished difference. Result has 500 places, 497 transitions, 7144 flow [2024-06-27 17:59:57,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7144, PETRI_PLACES=500, PETRI_TRANSITIONS=497} [2024-06-27 17:59:57,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-27 17:59:57,648 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 497 transitions, 7144 flow [2024-06-27 17:59:57,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:59:57,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:59:57,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:59:57,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 17:59:57,649 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:59:57,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:59:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1710725014, now seen corresponding path program 9 times [2024-06-27 17:59:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:59:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107672040] [2024-06-27 17:59:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:59:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:59:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:01,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:01,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107672040] [2024-06-27 18:00:01,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107672040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:01,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:01,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382553747] [2024-06-27 18:00:01,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:01,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:01,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:01,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:01,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 497 transitions, 7144 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:01,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:01,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:01,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:03,822 INFO L124 PetriNetUnfolderBase]: 3367/6225 cut-off events. [2024-06-27 18:00:03,822 INFO L125 PetriNetUnfolderBase]: For 374190/374190 co-relation queries the response was YES. [2024-06-27 18:00:03,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39587 conditions, 6225 events. 3367/6225 cut-off events. For 374190/374190 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44516 event pairs, 994 based on Foata normal form. 2/5859 useless extension candidates. Maximal degree in co-relation 39342. Up to 5425 conditions per place. [2024-06-27 18:00:03,909 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 461 selfloop transitions, 71 changer transitions 0/539 dead transitions. [2024-06-27 18:00:03,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 539 transitions, 8601 flow [2024-06-27 18:00:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:00:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:00:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 18:00:03,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 18:00:03,911 INFO L175 Difference]: Start difference. First operand has 500 places, 497 transitions, 7144 flow. Second operand 12 states and 188 transitions. [2024-06-27 18:00:03,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 539 transitions, 8601 flow [2024-06-27 18:00:07,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 539 transitions, 8283 flow, removed 67 selfloop flow, removed 10 redundant places. [2024-06-27 18:00:07,490 INFO L231 Difference]: Finished difference. Result has 502 places, 499 transitions, 7119 flow [2024-06-27 18:00:07,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7119, PETRI_PLACES=502, PETRI_TRANSITIONS=499} [2024-06-27 18:00:07,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-27 18:00:07,491 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 499 transitions, 7119 flow [2024-06-27 18:00:07,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:07,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:07,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:07,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 18:00:07,491 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:07,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1059235900, now seen corresponding path program 10 times [2024-06-27 18:00:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576285595] [2024-06-27 18:00:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:10,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:10,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576285595] [2024-06-27 18:00:10,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576285595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:10,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:10,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176708476] [2024-06-27 18:00:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:10,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:10,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 499 transitions, 7119 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:10,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:10,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:10,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:13,044 INFO L124 PetriNetUnfolderBase]: 3383/6259 cut-off events. [2024-06-27 18:00:13,045 INFO L125 PetriNetUnfolderBase]: For 384276/384276 co-relation queries the response was YES. [2024-06-27 18:00:13,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39784 conditions, 6259 events. 3383/6259 cut-off events. For 384276/384276 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44841 event pairs, 1038 based on Foata normal form. 2/5891 useless extension candidates. Maximal degree in co-relation 39538. Up to 5547 conditions per place. [2024-06-27 18:00:13,177 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 470 selfloop transitions, 58 changer transitions 0/535 dead transitions. [2024-06-27 18:00:13,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 535 transitions, 8448 flow [2024-06-27 18:00:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:00:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:00:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-27 18:00:13,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 18:00:13,190 INFO L175 Difference]: Start difference. First operand has 502 places, 499 transitions, 7119 flow. Second operand 12 states and 182 transitions. [2024-06-27 18:00:13,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 535 transitions, 8448 flow [2024-06-27 18:00:16,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 535 transitions, 8171 flow, removed 69 selfloop flow, removed 10 redundant places. [2024-06-27 18:00:16,907 INFO L231 Difference]: Finished difference. Result has 504 places, 501 transitions, 7114 flow [2024-06-27 18:00:16,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7114, PETRI_PLACES=504, PETRI_TRANSITIONS=501} [2024-06-27 18:00:16,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-27 18:00:16,908 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 501 transitions, 7114 flow [2024-06-27 18:00:16,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:16,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:16,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:16,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 18:00:16,909 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:16,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1967225524, now seen corresponding path program 11 times [2024-06-27 18:00:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120324474] [2024-06-27 18:00:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:16,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120324474] [2024-06-27 18:00:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120324474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:20,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:20,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:20,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967390190] [2024-06-27 18:00:20,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:20,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 501 transitions, 7114 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:23,167 INFO L124 PetriNetUnfolderBase]: 3423/6338 cut-off events. [2024-06-27 18:00:23,167 INFO L125 PetriNetUnfolderBase]: For 395158/395158 co-relation queries the response was YES. [2024-06-27 18:00:23,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 6338 events. 3423/6338 cut-off events. For 395158/395158 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45608 event pairs, 1030 based on Foata normal form. 2/5967 useless extension candidates. Maximal degree in co-relation 40010. Up to 5439 conditions per place. [2024-06-27 18:00:23,290 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 447 selfloop transitions, 92 changer transitions 0/546 dead transitions. [2024-06-27 18:00:23,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 546 transitions, 8579 flow [2024-06-27 18:00:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:00:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:00:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 18:00:23,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-27 18:00:23,309 INFO L175 Difference]: Start difference. First operand has 504 places, 501 transitions, 7114 flow. Second operand 12 states and 190 transitions. [2024-06-27 18:00:23,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 546 transitions, 8579 flow [2024-06-27 18:00:27,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 546 transitions, 8325 flow, removed 71 selfloop flow, removed 10 redundant places. [2024-06-27 18:00:27,162 INFO L231 Difference]: Finished difference. Result has 507 places, 505 transitions, 7286 flow [2024-06-27 18:00:27,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7286, PETRI_PLACES=507, PETRI_TRANSITIONS=505} [2024-06-27 18:00:27,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-27 18:00:27,164 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 505 transitions, 7286 flow [2024-06-27 18:00:27,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:27,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:27,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 18:00:27,164 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:27,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1967502354, now seen corresponding path program 4 times [2024-06-27 18:00:27,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:27,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072523185] [2024-06-27 18:00:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:27,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:31,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072523185] [2024-06-27 18:00:31,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072523185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:31,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:31,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:31,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503270401] [2024-06-27 18:00:31,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:31,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:31,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:31,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 505 transitions, 7286 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:31,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:31,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:31,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:34,063 INFO L124 PetriNetUnfolderBase]: 3527/6541 cut-off events. [2024-06-27 18:00:34,063 INFO L125 PetriNetUnfolderBase]: For 560339/560339 co-relation queries the response was YES. [2024-06-27 18:00:34,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41695 conditions, 6541 events. 3527/6541 cut-off events. For 560339/560339 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 47507 event pairs, 1097 based on Foata normal form. 16/6184 useless extension candidates. Maximal degree in co-relation 41446. Up to 5440 conditions per place. [2024-06-27 18:00:34,158 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 446 selfloop transitions, 96 changer transitions 0/549 dead transitions. [2024-06-27 18:00:34,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 549 transitions, 8643 flow [2024-06-27 18:00:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:00:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:00:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-27 18:00:34,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40039447731755423 [2024-06-27 18:00:34,159 INFO L175 Difference]: Start difference. First operand has 507 places, 505 transitions, 7286 flow. Second operand 13 states and 203 transitions. [2024-06-27 18:00:34,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 549 transitions, 8643 flow [2024-06-27 18:00:37,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 549 transitions, 8255 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-06-27 18:00:37,807 INFO L231 Difference]: Finished difference. Result has 511 places, 506 transitions, 7202 flow [2024-06-27 18:00:37,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7202, PETRI_PLACES=511, PETRI_TRANSITIONS=506} [2024-06-27 18:00:37,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-27 18:00:37,813 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 506 transitions, 7202 flow [2024-06-27 18:00:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:37,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:37,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:37,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 18:00:37,814 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:37,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1976439654, now seen corresponding path program 5 times [2024-06-27 18:00:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835570879] [2024-06-27 18:00:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:41,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:41,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835570879] [2024-06-27 18:00:41,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835570879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:41,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:41,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:41,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607718366] [2024-06-27 18:00:41,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:41,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:41,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:41,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:41,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 506 transitions, 7202 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:41,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:41,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:41,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:45,097 INFO L124 PetriNetUnfolderBase]: 3595/6670 cut-off events. [2024-06-27 18:00:45,097 INFO L125 PetriNetUnfolderBase]: For 512707/512707 co-relation queries the response was YES. [2024-06-27 18:00:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42214 conditions, 6670 events. 3595/6670 cut-off events. For 512707/512707 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 48705 event pairs, 1099 based on Foata normal form. 10/6307 useless extension candidates. Maximal degree in co-relation 41964. Up to 5298 conditions per place. [2024-06-27 18:00:45,218 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 419 selfloop transitions, 126 changer transitions 0/552 dead transitions. [2024-06-27 18:00:45,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 552 transitions, 8596 flow [2024-06-27 18:00:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:00:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:00:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 207 transitions. [2024-06-27 18:00:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40828402366863903 [2024-06-27 18:00:45,219 INFO L175 Difference]: Start difference. First operand has 511 places, 506 transitions, 7202 flow. Second operand 13 states and 207 transitions. [2024-06-27 18:00:45,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 552 transitions, 8596 flow [2024-06-27 18:00:49,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 552 transitions, 8314 flow, removed 48 selfloop flow, removed 11 redundant places. [2024-06-27 18:00:49,113 INFO L231 Difference]: Finished difference. Result has 513 places, 508 transitions, 7317 flow [2024-06-27 18:00:49,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7317, PETRI_PLACES=513, PETRI_TRANSITIONS=508} [2024-06-27 18:00:49,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-27 18:00:49,114 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 508 transitions, 7317 flow [2024-06-27 18:00:49,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:49,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:00:49,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:00:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 18:00:49,115 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:00:49,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:00:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1710523204, now seen corresponding path program 12 times [2024-06-27 18:00:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:00:49,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578744849] [2024-06-27 18:00:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:00:49,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:00:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:00:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:00:53,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:00:53,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578744849] [2024-06-27 18:00:53,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578744849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:00:53,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:00:53,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:00:53,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805423855] [2024-06-27 18:00:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:00:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:00:53,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:00:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:00:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:00:53,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:00:53,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 508 transitions, 7317 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:00:53,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:00:53,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:00:53,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:00:56,244 INFO L124 PetriNetUnfolderBase]: 3623/6736 cut-off events. [2024-06-27 18:00:56,244 INFO L125 PetriNetUnfolderBase]: For 426985/426985 co-relation queries the response was YES. [2024-06-27 18:00:56,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42431 conditions, 6736 events. 3623/6736 cut-off events. For 426985/426985 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 49380 event pairs, 1150 based on Foata normal form. 2/6355 useless extension candidates. Maximal degree in co-relation 42180. Up to 5885 conditions per place. [2024-06-27 18:00:56,330 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 477 selfloop transitions, 70 changer transitions 0/554 dead transitions. [2024-06-27 18:00:56,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 554 transitions, 8774 flow [2024-06-27 18:00:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:00:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:00:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-27 18:00:56,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081196581196581 [2024-06-27 18:00:56,332 INFO L175 Difference]: Start difference. First operand has 513 places, 508 transitions, 7317 flow. Second operand 12 states and 191 transitions. [2024-06-27 18:00:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 554 transitions, 8774 flow [2024-06-27 18:01:00,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 554 transitions, 8412 flow, removed 60 selfloop flow, removed 11 redundant places. [2024-06-27 18:01:00,147 INFO L231 Difference]: Finished difference. Result has 516 places, 512 transitions, 7303 flow [2024-06-27 18:01:00,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6955, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7303, PETRI_PLACES=516, PETRI_TRANSITIONS=512} [2024-06-27 18:01:00,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-27 18:01:00,148 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 512 transitions, 7303 flow [2024-06-27 18:01:00,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:00,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:00,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 18:01:00,148 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:00,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1718151684, now seen corresponding path program 6 times [2024-06-27 18:01:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:00,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746531376] [2024-06-27 18:01:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:04,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:04,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746531376] [2024-06-27 18:01:04,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746531376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:04,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466853582] [2024-06-27 18:01:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:04,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 512 transitions, 7303 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:04,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:04,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:04,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:07,147 INFO L124 PetriNetUnfolderBase]: 3691/6867 cut-off events. [2024-06-27 18:01:07,148 INFO L125 PetriNetUnfolderBase]: For 503336/503336 co-relation queries the response was YES. [2024-06-27 18:01:07,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42214 conditions, 6867 events. 3691/6867 cut-off events. For 503336/503336 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 50638 event pairs, 1181 based on Foata normal form. 10/6493 useless extension candidates. Maximal degree in co-relation 41960. Up to 5932 conditions per place. [2024-06-27 18:01:07,271 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 473 selfloop transitions, 75 changer transitions 0/555 dead transitions. [2024-06-27 18:01:07,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 555 transitions, 8674 flow [2024-06-27 18:01:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:01:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:01:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 200 transitions. [2024-06-27 18:01:07,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39447731755424065 [2024-06-27 18:01:07,273 INFO L175 Difference]: Start difference. First operand has 516 places, 512 transitions, 7303 flow. Second operand 13 states and 200 transitions. [2024-06-27 18:01:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 555 transitions, 8674 flow [2024-06-27 18:01:11,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 555 transitions, 8358 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-27 18:01:11,464 INFO L231 Difference]: Finished difference. Result has 521 places, 513 transitions, 7252 flow [2024-06-27 18:01:11,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7252, PETRI_PLACES=521, PETRI_TRANSITIONS=513} [2024-06-27 18:01:11,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-27 18:01:11,465 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 513 transitions, 7252 flow [2024-06-27 18:01:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:11,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:11,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:11,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 18:01:11,465 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:11,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash -387410580, now seen corresponding path program 13 times [2024-06-27 18:01:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518920143] [2024-06-27 18:01:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518920143] [2024-06-27 18:01:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518920143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758024237] [2024-06-27 18:01:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:14,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:15,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 513 transitions, 7252 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:15,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:15,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:15,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:18,207 INFO L124 PetriNetUnfolderBase]: 3715/6923 cut-off events. [2024-06-27 18:01:18,207 INFO L125 PetriNetUnfolderBase]: For 427455/427455 co-relation queries the response was YES. [2024-06-27 18:01:18,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42533 conditions, 6923 events. 3715/6923 cut-off events. For 427455/427455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51261 event pairs, 1206 based on Foata normal form. 2/6536 useless extension candidates. Maximal degree in co-relation 42278. Up to 6103 conditions per place. [2024-06-27 18:01:18,330 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 489 selfloop transitions, 59 changer transitions 0/555 dead transitions. [2024-06-27 18:01:18,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 555 transitions, 8721 flow [2024-06-27 18:01:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:01:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:01:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-27 18:01:18,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-06-27 18:01:18,332 INFO L175 Difference]: Start difference. First operand has 521 places, 513 transitions, 7252 flow. Second operand 12 states and 188 transitions. [2024-06-27 18:01:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 555 transitions, 8721 flow [2024-06-27 18:01:22,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 555 transitions, 8470 flow, removed 52 selfloop flow, removed 11 redundant places. [2024-06-27 18:01:22,670 INFO L231 Difference]: Finished difference. Result has 522 places, 515 transitions, 7234 flow [2024-06-27 18:01:22,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7001, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7234, PETRI_PLACES=522, PETRI_TRANSITIONS=515} [2024-06-27 18:01:22,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-27 18:01:22,671 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 515 transitions, 7234 flow [2024-06-27 18:01:22,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:22,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:22,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:22,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 18:01:22,671 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:22,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -387612390, now seen corresponding path program 14 times [2024-06-27 18:01:22,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:22,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433515352] [2024-06-27 18:01:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:22,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:26,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433515352] [2024-06-27 18:01:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433515352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:26,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:26,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688014435] [2024-06-27 18:01:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:26,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:26,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:26,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 515 transitions, 7234 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:26,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:26,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:26,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:29,094 INFO L124 PetriNetUnfolderBase]: 3735/6959 cut-off events. [2024-06-27 18:01:29,094 INFO L125 PetriNetUnfolderBase]: For 424611/424611 co-relation queries the response was YES. [2024-06-27 18:01:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42678 conditions, 6959 events. 3735/6959 cut-off events. For 424611/424611 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 51611 event pairs, 1206 based on Foata normal form. 2/6571 useless extension candidates. Maximal degree in co-relation 42422. Up to 6163 conditions per place. [2024-06-27 18:01:29,208 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 499 selfloop transitions, 54 changer transitions 0/560 dead transitions. [2024-06-27 18:01:29,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 560 transitions, 8689 flow [2024-06-27 18:01:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:01:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:01:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 18:01:29,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 18:01:29,210 INFO L175 Difference]: Start difference. First operand has 522 places, 515 transitions, 7234 flow. Second operand 12 states and 189 transitions. [2024-06-27 18:01:29,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 560 transitions, 8689 flow [2024-06-27 18:01:33,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 560 transitions, 8544 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 18:01:33,922 INFO L231 Difference]: Finished difference. Result has 526 places, 517 transitions, 7373 flow [2024-06-27 18:01:33,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7089, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7373, PETRI_PLACES=526, PETRI_TRANSITIONS=517} [2024-06-27 18:01:33,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-27 18:01:33,923 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 517 transitions, 7373 flow [2024-06-27 18:01:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:33,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:33,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 18:01:33,923 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:33,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash -186044500, now seen corresponding path program 7 times [2024-06-27 18:01:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:33,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880151950] [2024-06-27 18:01:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:37,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:37,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880151950] [2024-06-27 18:01:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880151950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642429358] [2024-06-27 18:01:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:37,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:37,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 517 transitions, 7373 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:37,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:37,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:37,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:40,942 INFO L124 PetriNetUnfolderBase]: 3803/7090 cut-off events. [2024-06-27 18:01:40,942 INFO L125 PetriNetUnfolderBase]: For 532119/532119 co-relation queries the response was YES. [2024-06-27 18:01:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43710 conditions, 7090 events. 3803/7090 cut-off events. For 532119/532119 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 52799 event pairs, 1258 based on Foata normal form. 10/6709 useless extension candidates. Maximal degree in co-relation 43452. Up to 6210 conditions per place. [2024-06-27 18:01:41,070 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 493 selfloop transitions, 59 changer transitions 0/559 dead transitions. [2024-06-27 18:01:41,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 559 transitions, 8752 flow [2024-06-27 18:01:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:01:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:01:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 198 transitions. [2024-06-27 18:01:41,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905325443786982 [2024-06-27 18:01:41,071 INFO L175 Difference]: Start difference. First operand has 526 places, 517 transitions, 7373 flow. Second operand 13 states and 198 transitions. [2024-06-27 18:01:41,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 559 transitions, 8752 flow [2024-06-27 18:01:45,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 559 transitions, 8486 flow, removed 81 selfloop flow, removed 10 redundant places. [2024-06-27 18:01:45,804 INFO L231 Difference]: Finished difference. Result has 529 places, 518 transitions, 7344 flow [2024-06-27 18:01:45,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7344, PETRI_PLACES=529, PETRI_TRANSITIONS=518} [2024-06-27 18:01:45,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 486 predicate places. [2024-06-27 18:01:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 518 transitions, 7344 flow [2024-06-27 18:01:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:45,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 18:01:45,806 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:45,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash -392974770, now seen corresponding path program 15 times [2024-06-27 18:01:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:45,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654329245] [2024-06-27 18:01:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:45,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654329245] [2024-06-27 18:01:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654329245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:48,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:01:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753141784] [2024-06-27 18:01:48,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:48,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:01:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:48,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:01:48,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:01:48,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:48,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 518 transitions, 7344 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:48,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:48,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:01:51,962 INFO L124 PetriNetUnfolderBase]: 3823/7126 cut-off events. [2024-06-27 18:01:51,962 INFO L125 PetriNetUnfolderBase]: For 452351/452351 co-relation queries the response was YES. [2024-06-27 18:01:52,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43945 conditions, 7126 events. 3823/7126 cut-off events. For 452351/452351 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 53126 event pairs, 1235 based on Foata normal form. 2/6735 useless extension candidates. Maximal degree in co-relation 43686. Up to 6322 conditions per place. [2024-06-27 18:01:52,059 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 506 selfloop transitions, 51 changer transitions 0/564 dead transitions. [2024-06-27 18:01:52,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 564 transitions, 8927 flow [2024-06-27 18:01:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:01:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:01:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-27 18:01:52,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-27 18:01:52,061 INFO L175 Difference]: Start difference. First operand has 529 places, 518 transitions, 7344 flow. Second operand 12 states and 190 transitions. [2024-06-27 18:01:52,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 564 transitions, 8927 flow [2024-06-27 18:01:56,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 564 transitions, 8704 flow, removed 54 selfloop flow, removed 11 redundant places. [2024-06-27 18:01:56,365 INFO L231 Difference]: Finished difference. Result has 530 places, 520 transitions, 7404 flow [2024-06-27 18:01:56,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7404, PETRI_PLACES=530, PETRI_TRANSITIONS=520} [2024-06-27 18:01:56,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-27 18:01:56,366 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 520 transitions, 7404 flow [2024-06-27 18:01:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:56,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:01:56,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:01:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 18:01:56,366 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:01:56,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:01:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash 963899188, now seen corresponding path program 16 times [2024-06-27 18:01:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:01:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337858573] [2024-06-27 18:01:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:01:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:01:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:01:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:01:59,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:01:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337858573] [2024-06-27 18:01:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337858573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:01:59,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:01:59,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:01:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865079895] [2024-06-27 18:01:59,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:01:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:01:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:01:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:01:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:01:59,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:01:59,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 520 transitions, 7404 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:01:59,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:01:59,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:01:59,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,676 INFO L124 PetriNetUnfolderBase]: 3969/7438 cut-off events. [2024-06-27 18:02:02,677 INFO L125 PetriNetUnfolderBase]: For 461146/461146 co-relation queries the response was YES. [2024-06-27 18:02:02,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45476 conditions, 7438 events. 3969/7438 cut-off events. For 461146/461146 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 56340 event pairs, 1400 based on Foata normal form. 2/7032 useless extension candidates. Maximal degree in co-relation 45216. Up to 6536 conditions per place. [2024-06-27 18:02:02,825 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 534 selfloop transitions, 47 changer transitions 0/588 dead transitions. [2024-06-27 18:02:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 588 transitions, 9219 flow [2024-06-27 18:02:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:02:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:02:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-27 18:02:02,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-27 18:02:02,827 INFO L175 Difference]: Start difference. First operand has 530 places, 520 transitions, 7404 flow. Second operand 12 states and 189 transitions. [2024-06-27 18:02:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 588 transitions, 9219 flow [2024-06-27 18:02:07,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 588 transitions, 8948 flow, removed 84 selfloop flow, removed 10 redundant places. [2024-06-27 18:02:07,852 INFO L231 Difference]: Finished difference. Result has 537 places, 541 transitions, 7651 flow [2024-06-27 18:02:07,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7137, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7651, PETRI_PLACES=537, PETRI_TRANSITIONS=541} [2024-06-27 18:02:07,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 494 predicate places. [2024-06-27 18:02:07,869 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 541 transitions, 7651 flow [2024-06-27 18:02:07,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:07,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:07,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:07,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 18:02:07,870 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:07,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash 263366954, now seen corresponding path program 17 times [2024-06-27 18:02:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:07,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066930612] [2024-06-27 18:02:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:11,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:11,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066930612] [2024-06-27 18:02:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066930612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:11,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-27 18:02:11,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733506622] [2024-06-27 18:02:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:11,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 18:02:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 18:02:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-27 18:02:11,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:02:11,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 541 transitions, 7651 flow. Second operand has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:11,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:11,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:02:11,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:14,612 INFO L124 PetriNetUnfolderBase]: 4007/7509 cut-off events. [2024-06-27 18:02:14,613 INFO L125 PetriNetUnfolderBase]: For 466593/466593 co-relation queries the response was YES. [2024-06-27 18:02:14,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46651 conditions, 7509 events. 4007/7509 cut-off events. For 466593/466593 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 56913 event pairs, 1483 based on Foata normal form. 2/7106 useless extension candidates. Maximal degree in co-relation 46385. Up to 6730 conditions per place. [2024-06-27 18:02:14,769 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 522 selfloop transitions, 57 changer transitions 0/586 dead transitions. [2024-06-27 18:02:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 586 transitions, 9312 flow [2024-06-27 18:02:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:02:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:02:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-06-27 18:02:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38247863247863245 [2024-06-27 18:02:14,771 INFO L175 Difference]: Start difference. First operand has 537 places, 541 transitions, 7651 flow. Second operand 12 states and 179 transitions. [2024-06-27 18:02:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 586 transitions, 9312 flow [2024-06-27 18:02:20,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 586 transitions, 9156 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 18:02:20,499 INFO L231 Difference]: Finished difference. Result has 547 places, 553 transitions, 8043 flow [2024-06-27 18:02:20,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8043, PETRI_PLACES=547, PETRI_TRANSITIONS=553} [2024-06-27 18:02:20,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-27 18:02:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 553 transitions, 8043 flow [2024-06-27 18:02:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.214285714285714) internal successors, (129), 14 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:20,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:20,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 18:02:20,500 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:20,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:20,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1466464244, now seen corresponding path program 18 times [2024-06-27 18:02:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903004241] [2024-06-27 18:02:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:23,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903004241] [2024-06-27 18:02:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903004241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:23,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:23,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:02:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127631507] [2024-06-27 18:02:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:02:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:02:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:23,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:02:23,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 553 transitions, 8043 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:23,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:23,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:02:23,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:27,044 INFO L124 PetriNetUnfolderBase]: 4075/7646 cut-off events. [2024-06-27 18:02:27,044 INFO L125 PetriNetUnfolderBase]: For 485153/485153 co-relation queries the response was YES. [2024-06-27 18:02:27,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48042 conditions, 7646 events. 4075/7646 cut-off events. For 485153/485153 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 58386 event pairs, 1497 based on Foata normal form. 2/7234 useless extension candidates. Maximal degree in co-relation 47772. Up to 6803 conditions per place. [2024-06-27 18:02:27,188 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 537 selfloop transitions, 53 changer transitions 0/597 dead transitions. [2024-06-27 18:02:27,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 597 transitions, 9723 flow [2024-06-27 18:02:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:02:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:02:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 183 transitions. [2024-06-27 18:02:27,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391025641025641 [2024-06-27 18:02:27,190 INFO L175 Difference]: Start difference. First operand has 547 places, 553 transitions, 8043 flow. Second operand 12 states and 183 transitions. [2024-06-27 18:02:27,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 597 transitions, 9723 flow [2024-06-27 18:02:32,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 597 transitions, 9344 flow, removed 85 selfloop flow, removed 10 redundant places. [2024-06-27 18:02:32,678 INFO L231 Difference]: Finished difference. Result has 550 places, 559 transitions, 8015 flow [2024-06-27 18:02:32,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8015, PETRI_PLACES=550, PETRI_TRANSITIONS=559} [2024-06-27 18:02:32,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 507 predicate places. [2024-06-27 18:02:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 559 transitions, 8015 flow [2024-06-27 18:02:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:32,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:32,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 18:02:32,679 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:32,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2130801204, now seen corresponding path program 19 times [2024-06-27 18:02:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735418195] [2024-06-27 18:02:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:36,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:36,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735418195] [2024-06-27 18:02:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735418195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:36,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:02:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634034000] [2024-06-27 18:02:36,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:36,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:02:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:02:36,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:36,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:02:36,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 559 transitions, 8015 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:36,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:02:36,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:39,225 INFO L124 PetriNetUnfolderBase]: 4177/7869 cut-off events. [2024-06-27 18:02:39,225 INFO L125 PetriNetUnfolderBase]: For 505938/505938 co-relation queries the response was YES. [2024-06-27 18:02:39,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49428 conditions, 7869 events. 4177/7869 cut-off events. For 505938/505938 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 60676 event pairs, 1537 based on Foata normal form. 2/7442 useless extension candidates. Maximal degree in co-relation 49156. Up to 6946 conditions per place. [2024-06-27 18:02:39,371 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 553 selfloop transitions, 51 changer transitions 0/611 dead transitions. [2024-06-27 18:02:39,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 611 transitions, 9799 flow [2024-06-27 18:02:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:02:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:02:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-27 18:02:39,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-06-27 18:02:39,373 INFO L175 Difference]: Start difference. First operand has 550 places, 559 transitions, 8015 flow. Second operand 12 states and 186 transitions. [2024-06-27 18:02:39,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 611 transitions, 9799 flow [2024-06-27 18:02:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 611 transitions, 9530 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-27 18:02:45,069 INFO L231 Difference]: Finished difference. Result has 555 places, 569 transitions, 8157 flow [2024-06-27 18:02:45,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8157, PETRI_PLACES=555, PETRI_TRANSITIONS=569} [2024-06-27 18:02:45,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 512 predicate places. [2024-06-27 18:02:45,070 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 569 transitions, 8157 flow [2024-06-27 18:02:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 18:02:45,070 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:45,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1255198004, now seen corresponding path program 20 times [2024-06-27 18:02:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492968468] [2024-06-27 18:02:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:47,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492968468] [2024-06-27 18:02:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492968468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:47,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:47,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:02:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521732110] [2024-06-27 18:02:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:47,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:02:47,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:02:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:02:47,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:02:47,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 569 transitions, 8157 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:47,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:47,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:02:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:51,974 INFO L124 PetriNetUnfolderBase]: 4299/8134 cut-off events. [2024-06-27 18:02:51,975 INFO L125 PetriNetUnfolderBase]: For 522665/522665 co-relation queries the response was YES. [2024-06-27 18:02:52,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 8134 events. 4299/8134 cut-off events. For 522665/522665 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 63470 event pairs, 1592 based on Foata normal form. 2/7690 useless extension candidates. Maximal degree in co-relation 50638. Up to 7151 conditions per place. [2024-06-27 18:02:52,110 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 572 selfloop transitions, 49 changer transitions 0/628 dead transitions. [2024-06-27 18:02:52,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 628 transitions, 9997 flow [2024-06-27 18:02:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:02:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:02:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-27 18:02:52,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995726495726496 [2024-06-27 18:02:52,112 INFO L175 Difference]: Start difference. First operand has 555 places, 569 transitions, 8157 flow. Second operand 12 states and 187 transitions. [2024-06-27 18:02:52,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 628 transitions, 9997 flow [2024-06-27 18:02:57,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 628 transitions, 9736 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-27 18:02:57,685 INFO L231 Difference]: Finished difference. Result has 562 places, 583 transitions, 8325 flow [2024-06-27 18:02:57,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8325, PETRI_PLACES=562, PETRI_TRANSITIONS=583} [2024-06-27 18:02:57,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 519 predicate places. [2024-06-27 18:02:57,685 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 583 transitions, 8325 flow [2024-06-27 18:02:57,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:57,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:57,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:57,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 18:02:57,686 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:02:57,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1217122260, now seen corresponding path program 21 times [2024-06-27 18:02:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738003076] [2024-06-27 18:02:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:57,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:03:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:00,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738003076] [2024-06-27 18:03:00,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738003076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:00,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:00,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 18:03:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023721837] [2024-06-27 18:03:00,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 18:03:00,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:00,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 18:03:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-27 18:03:00,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-27 18:03:00,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 583 transitions, 8325 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:00,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:00,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-27 18:03:00,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15