./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:53:06,547 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:53:06,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:53:06,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:53:06,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:53:06,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:53:06,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:53:06,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:53:06,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:53:06,686 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:53:06,687 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:53:06,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:53:06,688 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:53:06,689 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:53:06,689 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:53:06,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:53:06,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:53:06,690 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:53:06,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:53:06,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:53:06,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:53:06,691 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:53:06,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:53:06,692 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:53:06,692 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:53:06,693 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:53:06,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:53:06,693 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:53:06,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:53:06,694 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:53:06,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:53:06,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:53:06,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:53:06,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:53:06,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:53:06,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:53:06,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:53:06,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:53:06,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:53:06,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:53:06,697 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:53:06,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:53:06,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:53:06,698 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:53:06,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:53:07,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:53:07,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:53:07,005 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:53:07,006 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:53:07,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 20:53:08,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:53:08,460 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:53:08,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 20:53:08,487 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9225ef8d9/e00d7a23d43d4a5ab527cf5a015f07e0/FLAGa29e72521 [2024-06-27 20:53:08,499 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9225ef8d9/e00d7a23d43d4a5ab527cf5a015f07e0 [2024-06-27 20:53:08,501 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:53:08,502 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:53:08,502 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe002_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 20:53:08,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:53:08,662 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:53:08,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:53:08,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:53:08,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:53:08,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:53:08" (1/2) ... [2024-06-27 20:53:08,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731e7f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:53:08, skipping insertion in model container [2024-06-27 20:53:08,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:53:08" (1/2) ... [2024-06-27 20:53:08,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@331c8ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:53:08, skipping insertion in model container [2024-06-27 20:53:08,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:53:08" (2/2) ... [2024-06-27 20:53:08,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731e7f49 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:53:08, skipping insertion in model container [2024-06-27 20:53:08,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:53:08" (2/2) ... [2024-06-27 20:53:08,671 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:53:08,760 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:53:08,762 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:53:08,762 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:53:08,762 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] (((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 20:53:08,763 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:53:08,763 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-27 20:53:08,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:53:09,230 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:53:09,241 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:53:09,380 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:53:09,430 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:53:09,431 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:53:09 WrapperNode [2024-06-27 20:53:09,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:53:09,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:53:09,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:53:09,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:53:09,440 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,470 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,503 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-27 20:53:09,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:53:09,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:53:09,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:53:09,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:53:09,514 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,514 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,517 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,545 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:53:09,547 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,547 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,558 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,566 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,574 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,576 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:53:09,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:53:09,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:53:09,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:53:09,585 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 08:53:09" (1/1) ... [2024-06-27 20:53:09,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:53:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:53:09,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:53:09,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:53:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:53:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:53:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:53:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:53:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:53:09,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:53:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:53:09,656 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:53:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:53:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:53:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:53:09,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:53:09,658 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:53:09,797 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:53:09,799 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:53:10,159 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:53:10,160 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:53:10,342 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:53:10,342 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:53:10,343 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:53:10 BoogieIcfgContainer [2024-06-27 20:53:10,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:53:10,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:53:10,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:53:10,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:53:10,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:53:08" (1/4) ... [2024-06-27 20:53:10,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153edb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:53:10, skipping insertion in model container [2024-06-27 20:53:10,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:53:08" (2/4) ... [2024-06-27 20:53:10,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153edb11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:53:10, skipping insertion in model container [2024-06-27 20:53:10,351 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 08:53:09" (3/4) ... [2024-06-27 20:53:10,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@153edb11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:53:10, skipping insertion in model container [2024-06-27 20:53:10,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:53:10" (4/4) ... [2024-06-27 20:53:10,352 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-27 20:53:10,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:53:10,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:53:10,368 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:53:10,424 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:53:10,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:53:10,496 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:53:10,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:53:10,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:53:10,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:53:10,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:53:10,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:53:10,523 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;@7d78d16a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:53:10,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:53:10,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:53:10,529 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:53:10,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:53:10,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:10,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:53:10,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:10,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 362302094, now seen corresponding path program 1 times [2024-06-27 20:53:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:10,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602055272] [2024-06-27 20:53:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:11,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602055272] [2024-06-27 20:53:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602055272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:11,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:11,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:53:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131911364] [2024-06-27 20:53:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:53:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:53:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:53:11,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 20:53:11,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:11,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:11,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 20:53:11,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:12,015 INFO L124 PetriNetUnfolderBase]: 891/1368 cut-off events. [2024-06-27 20:53:12,016 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-27 20:53:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2789 conditions, 1368 events. 891/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6418 event pairs, 463 based on Foata normal form. 2/1341 useless extension candidates. Maximal degree in co-relation 2777. Up to 1335 conditions per place. [2024-06-27 20:53:12,031 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:53:12,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 169 flow [2024-06-27 20:53:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:53:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:53:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-27 20:53:12,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 20:53:12,047 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-27 20:53:12,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 169 flow [2024-06-27 20:53:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:12,052 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:53:12,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 20:53:12,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:53:12,059 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:53:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:12,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:12,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:12,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:53:12,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:12,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash 383754188, now seen corresponding path program 1 times [2024-06-27 20:53:12,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:12,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382666347] [2024-06-27 20:53:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382666347] [2024-06-27 20:53:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382666347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:13,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:53:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873322786] [2024-06-27 20:53:13,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:13,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:53:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:53:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:53:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-27 20:53:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-27 20:53:13,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:13,906 INFO L124 PetriNetUnfolderBase]: 1131/1721 cut-off events. [2024-06-27 20:53:13,906 INFO L125 PetriNetUnfolderBase]: For 339/353 co-relation queries the response was YES. [2024-06-27 20:53:13,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3989 conditions, 1721 events. 1131/1721 cut-off events. For 339/353 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7884 event pairs, 409 based on Foata normal form. 13/1730 useless extension candidates. Maximal degree in co-relation 3977. Up to 1639 conditions per place. [2024-06-27 20:53:13,918 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 37 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-27 20:53:13,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 222 flow [2024-06-27 20:53:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:53:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:53:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 20:53:13,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 20:53:13,923 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 94 transitions. [2024-06-27 20:53:13,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 222 flow [2024-06-27 20:53:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:53:13,927 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-27 20:53:13,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-27 20:53:13,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-27 20:53:13,929 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-27 20:53:13,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:13,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:13,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:13,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:53:13,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash -113496575, now seen corresponding path program 1 times [2024-06-27 20:53:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:13,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451001289] [2024-06-27 20:53:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451001289] [2024-06-27 20:53:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451001289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:14,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:14,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:53:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730677910] [2024-06-27 20:53:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:53:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:53:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:53:14,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:53:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 20:53:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:14,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:53:14,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:14,997 INFO L124 PetriNetUnfolderBase]: 888/1371 cut-off events. [2024-06-27 20:53:14,997 INFO L125 PetriNetUnfolderBase]: For 720/723 co-relation queries the response was YES. [2024-06-27 20:53:15,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1371 events. 888/1371 cut-off events. For 720/723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6342 event pairs, 408 based on Foata normal form. 6/1375 useless extension candidates. Maximal degree in co-relation 3460. Up to 1326 conditions per place. [2024-06-27 20:53:15,006 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-27 20:53:15,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 271 flow [2024-06-27 20:53:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:53:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:53:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-27 20:53:15,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-27 20:53:15,008 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 5 states and 99 transitions. [2024-06-27 20:53:15,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 271 flow [2024-06-27 20:53:15,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:15,011 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 170 flow [2024-06-27 20:53:15,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-27 20:53:15,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-06-27 20:53:15,012 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 170 flow [2024-06-27 20:53:15,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 20:53:15,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:15,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:53:15,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:15,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash 768531133, now seen corresponding path program 1 times [2024-06-27 20:53:15,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:15,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847288845] [2024-06-27 20:53:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:15,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847288845] [2024-06-27 20:53:15,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847288845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:15,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:15,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:53:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843575684] [2024-06-27 20:53:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:15,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:53:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:53:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:53:15,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:16,165 INFO L124 PetriNetUnfolderBase]: 1319/1996 cut-off events. [2024-06-27 20:53:16,165 INFO L125 PetriNetUnfolderBase]: For 1821/1821 co-relation queries the response was YES. [2024-06-27 20:53:16,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5618 conditions, 1996 events. 1319/1996 cut-off events. For 1821/1821 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9232 event pairs, 564 based on Foata normal form. 2/1997 useless extension candidates. Maximal degree in co-relation 5600. Up to 1953 conditions per place. [2024-06-27 20:53:16,179 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-27 20:53:16,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 357 flow [2024-06-27 20:53:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:53:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:53:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:53:16,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:53:16,181 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 170 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:53:16,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 357 flow [2024-06-27 20:53:16,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 342 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:16,185 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 230 flow [2024-06-27 20:53:16,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-27 20:53:16,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-27 20:53:16,186 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 230 flow [2024-06-27 20:53:16,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:16,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:16,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:53:16,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:16,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1945337390, now seen corresponding path program 1 times [2024-06-27 20:53:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93083004] [2024-06-27 20:53:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93083004] [2024-06-27 20:53:17,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93083004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:17,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:17,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:53:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350678400] [2024-06-27 20:53:17,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:17,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:53:17,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:53:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:53:17,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:17,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:17,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:17,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:17,537 INFO L124 PetriNetUnfolderBase]: 1314/1989 cut-off events. [2024-06-27 20:53:17,538 INFO L125 PetriNetUnfolderBase]: For 2745/2745 co-relation queries the response was YES. [2024-06-27 20:53:17,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6110 conditions, 1989 events. 1314/1989 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9211 event pairs, 546 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 6088. Up to 1937 conditions per place. [2024-06-27 20:53:17,553 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 54 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-06-27 20:53:17,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 424 flow [2024-06-27 20:53:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:53:17,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:53:17,555 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 230 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:53:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 424 flow [2024-06-27 20:53:17,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:53:17,560 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 280 flow [2024-06-27 20:53:17,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-27 20:53:17,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 20:53:17,561 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 280 flow [2024-06-27 20:53:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:17,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:53:17,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:17,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:17,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1258998764, now seen corresponding path program 1 times [2024-06-27 20:53:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938572535] [2024-06-27 20:53:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:17,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:18,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938572535] [2024-06-27 20:53:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938572535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:53:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029007325] [2024-06-27 20:53:18,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:53:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:53:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:53:18,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:53:18,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:18,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:18,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:53:18,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:19,059 INFO L124 PetriNetUnfolderBase]: 1272/1944 cut-off events. [2024-06-27 20:53:19,059 INFO L125 PetriNetUnfolderBase]: For 4197/4231 co-relation queries the response was YES. [2024-06-27 20:53:19,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6530 conditions, 1944 events. 1272/1944 cut-off events. For 4197/4231 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9187 event pairs, 484 based on Foata normal form. 20/1923 useless extension candidates. Maximal degree in co-relation 6505. Up to 1790 conditions per place. [2024-06-27 20:53:19,074 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-27 20:53:19,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 464 flow [2024-06-27 20:53:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:53:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:53:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 20:53:19,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-27 20:53:19,078 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 280 flow. Second operand 5 states and 98 transitions. [2024-06-27 20:53:19,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 464 flow [2024-06-27 20:53:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 436 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:19,084 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 320 flow [2024-06-27 20:53:19,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 20:53:19,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 20:53:19,087 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 320 flow [2024-06-27 20:53:19,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:19,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:19,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:19,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:53:19,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:19,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2126637698, now seen corresponding path program 1 times [2024-06-27 20:53:19,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:19,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404321659] [2024-06-27 20:53:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:19,835 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 20:53:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404321659] [2024-06-27 20:53:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404321659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:19,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:19,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:53:19,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335639620] [2024-06-27 20:53:19,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:53:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:53:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:53:19,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:19,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:19,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:19,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:19,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:20,527 INFO L124 PetriNetUnfolderBase]: 1526/2298 cut-off events. [2024-06-27 20:53:20,528 INFO L125 PetriNetUnfolderBase]: For 5795/5797 co-relation queries the response was YES. [2024-06-27 20:53:20,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2298 events. 1526/2298 cut-off events. For 5795/5797 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10715 event pairs, 522 based on Foata normal form. 15/2311 useless extension candidates. Maximal degree in co-relation 8195. Up to 2041 conditions per place. [2024-06-27 20:53:20,551 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 65 selfloop transitions, 30 changer transitions 0/99 dead transitions. [2024-06-27 20:53:20,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 99 transitions, 711 flow [2024-06-27 20:53:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:53:20,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:53:20,553 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 320 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:53:20,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 99 transitions, 711 flow [2024-06-27 20:53:20,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 660 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:20,563 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 506 flow [2024-06-27 20:53:20,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-06-27 20:53:20,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-27 20:53:20,565 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 506 flow [2024-06-27 20:53:20,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:20,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:20,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:53:20,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1036225552, now seen corresponding path program 2 times [2024-06-27 20:53:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585623548] [2024-06-27 20:53:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:21,349 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 20:53:21,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585623548] [2024-06-27 20:53:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585623548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:21,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:53:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532975022] [2024-06-27 20:53:21,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:53:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:53:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:53:21,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:21,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:21,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:21,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:21,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:22,085 INFO L124 PetriNetUnfolderBase]: 1660/2486 cut-off events. [2024-06-27 20:53:22,086 INFO L125 PetriNetUnfolderBase]: For 7806/7808 co-relation queries the response was YES. [2024-06-27 20:53:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 2486 events. 1660/2486 cut-off events. For 7806/7808 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11592 event pairs, 481 based on Foata normal form. 12/2496 useless extension candidates. Maximal degree in co-relation 10054. Up to 2243 conditions per place. [2024-06-27 20:53:22,113 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 87 selfloop transitions, 27 changer transitions 0/118 dead transitions. [2024-06-27 20:53:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 953 flow [2024-06-27 20:53:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:53:22,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:53:22,117 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 506 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:53:22,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 953 flow [2024-06-27 20:53:22,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 924 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:22,131 INFO L231 Difference]: Finished difference. Result has 73 places, 89 transitions, 678 flow [2024-06-27 20:53:22,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=678, PETRI_PLACES=73, PETRI_TRANSITIONS=89} [2024-06-27 20:53:22,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 20:53:22,134 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 89 transitions, 678 flow [2024-06-27 20:53:22,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:22,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:22,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:22,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:53:22,134 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:22,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash -175924580, now seen corresponding path program 3 times [2024-06-27 20:53:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:22,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810345140] [2024-06-27 20:53:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:22,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:22,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810345140] [2024-06-27 20:53:22,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810345140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:22,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:22,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:53:22,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005114318] [2024-06-27 20:53:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:22,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:53:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:53:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:53:22,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:22,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 89 transitions, 678 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:22,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:22,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:22,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:23,400 INFO L124 PetriNetUnfolderBase]: 1666/2498 cut-off events. [2024-06-27 20:53:23,400 INFO L125 PetriNetUnfolderBase]: For 10727/10729 co-relation queries the response was YES. [2024-06-27 20:53:23,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11248 conditions, 2498 events. 1666/2498 cut-off events. For 10727/10729 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11609 event pairs, 556 based on Foata normal form. 6/2502 useless extension candidates. Maximal degree in co-relation 11215. Up to 2326 conditions per place. [2024-06-27 20:53:23,420 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 95 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-06-27 20:53:23,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1146 flow [2024-06-27 20:53:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:53:23,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 20:53:23,423 INFO L175 Difference]: Start difference. First operand has 73 places, 89 transitions, 678 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:53:23,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1146 flow [2024-06-27 20:53:23,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 1075 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:23,441 INFO L231 Difference]: Finished difference. Result has 80 places, 104 transitions, 881 flow [2024-06-27 20:53:23,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=80, PETRI_TRANSITIONS=104} [2024-06-27 20:53:23,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 20:53:23,443 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 104 transitions, 881 flow [2024-06-27 20:53:23,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:23,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:23,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:23,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:53:23,444 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:23,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -175915652, now seen corresponding path program 1 times [2024-06-27 20:53:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396331787] [2024-06-27 20:53:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:23,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396331787] [2024-06-27 20:53:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396331787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:24,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:24,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:24,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914936936] [2024-06-27 20:53:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:24,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:24,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:24,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 104 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:24,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:24,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:24,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:25,034 INFO L124 PetriNetUnfolderBase]: 1658/2489 cut-off events. [2024-06-27 20:53:25,034 INFO L125 PetriNetUnfolderBase]: For 13116/13116 co-relation queries the response was YES. [2024-06-27 20:53:25,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2489 events. 1658/2489 cut-off events. For 13116/13116 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11562 event pairs, 564 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 11765. Up to 2402 conditions per place. [2024-06-27 20:53:25,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-27 20:53:25,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 1217 flow [2024-06-27 20:53:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:53:25,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:53:25,055 INFO L175 Difference]: Start difference. First operand has 80 places, 104 transitions, 881 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:53:25,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 1217 flow [2024-06-27 20:53:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 1171 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 20:53:25,072 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 902 flow [2024-06-27 20:53:25,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=902, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-27 20:53:25,073 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-27 20:53:25,076 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 902 flow [2024-06-27 20:53:25,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:25,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:25,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:25,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:53:25,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:25,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1365496808, now seen corresponding path program 1 times [2024-06-27 20:53:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:25,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627236111] [2024-06-27 20:53:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:26,121 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 20:53:26,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:26,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627236111] [2024-06-27 20:53:26,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627236111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:26,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:26,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:26,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249832424] [2024-06-27 20:53:26,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:26,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:26,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:26,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:26,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:26,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:26,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:26,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:26,780 INFO L124 PetriNetUnfolderBase]: 1717/2573 cut-off events. [2024-06-27 20:53:26,781 INFO L125 PetriNetUnfolderBase]: For 15441/15441 co-relation queries the response was YES. [2024-06-27 20:53:26,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12536 conditions, 2573 events. 1717/2573 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12080 event pairs, 499 based on Foata normal form. 5/2574 useless extension candidates. Maximal degree in co-relation 12495. Up to 2225 conditions per place. [2024-06-27 20:53:26,803 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 90 selfloop transitions, 52 changer transitions 0/146 dead transitions. [2024-06-27 20:53:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1460 flow [2024-06-27 20:53:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:53:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:53:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:53:26,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-27 20:53:26,805 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 902 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:53:26,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1460 flow [2024-06-27 20:53:26,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1405 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:26,831 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 1180 flow [2024-06-27 20:53:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1180, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-27 20:53:26,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-27 20:53:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 1180 flow [2024-06-27 20:53:26,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:26,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:26,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:53:26,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:26,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1251907265, now seen corresponding path program 1 times [2024-06-27 20:53:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:26,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115031514] [2024-06-27 20:53:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115031514] [2024-06-27 20:53:27,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115031514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:27,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206019691] [2024-06-27 20:53:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:27,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:27,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:27,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:27,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 1180 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:27,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:27,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:27,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:28,516 INFO L124 PetriNetUnfolderBase]: 1806/2711 cut-off events. [2024-06-27 20:53:28,516 INFO L125 PetriNetUnfolderBase]: For 21027/21034 co-relation queries the response was YES. [2024-06-27 20:53:28,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14635 conditions, 2711 events. 1806/2711 cut-off events. For 21027/21034 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12842 event pairs, 514 based on Foata normal form. 14/2723 useless extension candidates. Maximal degree in co-relation 14591. Up to 2429 conditions per place. [2024-06-27 20:53:28,538 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 121 selfloop transitions, 52 changer transitions 0/177 dead transitions. [2024-06-27 20:53:28,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 177 transitions, 1981 flow [2024-06-27 20:53:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:53:28,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 20:53:28,540 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 1180 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:53:28,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 177 transitions, 1981 flow [2024-06-27 20:53:28,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 1937 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:28,586 INFO L231 Difference]: Finished difference. Result has 99 places, 150 transitions, 1657 flow [2024-06-27 20:53:28,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1657, PETRI_PLACES=99, PETRI_TRANSITIONS=150} [2024-06-27 20:53:28,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-27 20:53:28,587 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 150 transitions, 1657 flow [2024-06-27 20:53:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:28,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:28,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:28,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:53:28,588 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:28,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2058219777, now seen corresponding path program 2 times [2024-06-27 20:53:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:28,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017876090] [2024-06-27 20:53:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:29,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:29,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017876090] [2024-06-27 20:53:29,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017876090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:29,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:29,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:29,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791270164] [2024-06-27 20:53:29,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:29,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:29,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:29,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:29,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 150 transitions, 1657 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:29,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:29,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:29,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:30,403 INFO L124 PetriNetUnfolderBase]: 1836/2740 cut-off events. [2024-06-27 20:53:30,403 INFO L125 PetriNetUnfolderBase]: For 26433/26440 co-relation queries the response was YES. [2024-06-27 20:53:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16340 conditions, 2740 events. 1836/2740 cut-off events. For 26433/26440 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12788 event pairs, 506 based on Foata normal form. 11/2749 useless extension candidates. Maximal degree in co-relation 16291. Up to 2564 conditions per place. [2024-06-27 20:53:30,428 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 161 selfloop transitions, 37 changer transitions 0/202 dead transitions. [2024-06-27 20:53:30,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 202 transitions, 2373 flow [2024-06-27 20:53:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:30,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:53:30,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:53:30,430 INFO L175 Difference]: Start difference. First operand has 99 places, 150 transitions, 1657 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:53:30,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 202 transitions, 2373 flow [2024-06-27 20:53:30,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 2296 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:30,487 INFO L231 Difference]: Finished difference. Result has 110 places, 173 transitions, 1947 flow [2024-06-27 20:53:30,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1947, PETRI_PLACES=110, PETRI_TRANSITIONS=173} [2024-06-27 20:53:30,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 20:53:30,489 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 173 transitions, 1947 flow [2024-06-27 20:53:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:30,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:30,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:53:30,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:30,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1086501403, now seen corresponding path program 3 times [2024-06-27 20:53:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:30,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873442782] [2024-06-27 20:53:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:31,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:31,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873442782] [2024-06-27 20:53:31,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873442782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:31,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994736916] [2024-06-27 20:53:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:31,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:31,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:31,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:31,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 173 transitions, 1947 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:31,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:31,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:31,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:32,219 INFO L124 PetriNetUnfolderBase]: 1858/2790 cut-off events. [2024-06-27 20:53:32,219 INFO L125 PetriNetUnfolderBase]: For 30008/30015 co-relation queries the response was YES. [2024-06-27 20:53:32,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17407 conditions, 2790 events. 1858/2790 cut-off events. For 30008/30015 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13184 event pairs, 518 based on Foata normal form. 10/2798 useless extension candidates. Maximal degree in co-relation 17352. Up to 2578 conditions per place. [2024-06-27 20:53:32,241 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 163 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-27 20:53:32,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 205 transitions, 2512 flow [2024-06-27 20:53:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:53:32,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:53:32,244 INFO L175 Difference]: Start difference. First operand has 110 places, 173 transitions, 1947 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:53:32,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 205 transitions, 2512 flow [2024-06-27 20:53:32,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 205 transitions, 2421 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:32,308 INFO L231 Difference]: Finished difference. Result has 116 places, 177 transitions, 2017 flow [2024-06-27 20:53:32,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2017, PETRI_PLACES=116, PETRI_TRANSITIONS=177} [2024-06-27 20:53:32,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-27 20:53:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 177 transitions, 2017 flow [2024-06-27 20:53:32,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:53:32,310 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2050601217, now seen corresponding path program 4 times [2024-06-27 20:53:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413812590] [2024-06-27 20:53:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413812590] [2024-06-27 20:53:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413812590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:33,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760970884] [2024-06-27 20:53:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:33,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:33,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 177 transitions, 2017 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:33,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:33,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:33,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:33,916 INFO L124 PetriNetUnfolderBase]: 1869/2811 cut-off events. [2024-06-27 20:53:33,916 INFO L125 PetriNetUnfolderBase]: For 33684/33691 co-relation queries the response was YES. [2024-06-27 20:53:33,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18112 conditions, 2811 events. 1869/2811 cut-off events. For 33684/33691 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13338 event pairs, 518 based on Foata normal form. 8/2817 useless extension candidates. Maximal degree in co-relation 18055. Up to 2542 conditions per place. [2024-06-27 20:53:33,939 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 164 selfloop transitions, 53 changer transitions 0/221 dead transitions. [2024-06-27 20:53:33,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 221 transitions, 2740 flow [2024-06-27 20:53:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:53:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:53:33,942 INFO L175 Difference]: Start difference. First operand has 116 places, 177 transitions, 2017 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:53:33,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 221 transitions, 2740 flow [2024-06-27 20:53:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 221 transitions, 2621 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:34,013 INFO L231 Difference]: Finished difference. Result has 120 places, 187 transitions, 2176 flow [2024-06-27 20:53:34,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2176, PETRI_PLACES=120, PETRI_TRANSITIONS=187} [2024-06-27 20:53:34,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-27 20:53:34,014 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 187 transitions, 2176 flow [2024-06-27 20:53:34,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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 20:53:34,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:34,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:34,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:53:34,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:34,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:34,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1960279976, now seen corresponding path program 1 times [2024-06-27 20:53:34,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:34,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078668460] [2024-06-27 20:53:34,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:34,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078668460] [2024-06-27 20:53:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078668460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:34,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:34,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:53:34,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335361302] [2024-06-27 20:53:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:53:34,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:34,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:53:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:53:34,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 187 transitions, 2176 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:34,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:34,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:34,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:35,224 INFO L124 PetriNetUnfolderBase]: 1859/2782 cut-off events. [2024-06-27 20:53:35,225 INFO L125 PetriNetUnfolderBase]: For 36949/36949 co-relation queries the response was YES. [2024-06-27 20:53:35,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18601 conditions, 2782 events. 1859/2782 cut-off events. For 36949/36949 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13096 event pairs, 468 based on Foata normal form. 6/2784 useless extension candidates. Maximal degree in co-relation 18542. Up to 2667 conditions per place. [2024-06-27 20:53:35,245 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 176 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-06-27 20:53:35,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 199 transitions, 2656 flow [2024-06-27 20:53:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:53:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:53:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 20:53:35,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-27 20:53:35,247 INFO L175 Difference]: Start difference. First operand has 120 places, 187 transitions, 2176 flow. Second operand 5 states and 92 transitions. [2024-06-27 20:53:35,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 199 transitions, 2656 flow [2024-06-27 20:53:35,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 199 transitions, 2535 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:35,311 INFO L231 Difference]: Finished difference. Result has 120 places, 190 transitions, 2155 flow [2024-06-27 20:53:35,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2155, PETRI_PLACES=120, PETRI_TRANSITIONS=190} [2024-06-27 20:53:35,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-27 20:53:35,312 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 190 transitions, 2155 flow [2024-06-27 20:53:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:35,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:35,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:53:35,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:35,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1759449951, now seen corresponding path program 1 times [2024-06-27 20:53:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:35,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462907243] [2024-06-27 20:53:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:35,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:36,241 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 20:53:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462907243] [2024-06-27 20:53:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462907243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632172529] [2024-06-27 20:53:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:36,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:53:36,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 190 transitions, 2155 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:36,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:36,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:53:36,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:36,922 INFO L124 PetriNetUnfolderBase]: 1850/2779 cut-off events. [2024-06-27 20:53:36,922 INFO L125 PetriNetUnfolderBase]: For 40237/40340 co-relation queries the response was YES. [2024-06-27 20:53:36,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18974 conditions, 2779 events. 1850/2779 cut-off events. For 40237/40340 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13251 event pairs, 341 based on Foata normal form. 15/2753 useless extension candidates. Maximal degree in co-relation 18913. Up to 2560 conditions per place. [2024-06-27 20:53:36,946 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 170 selfloop transitions, 13 changer transitions 0/209 dead transitions. [2024-06-27 20:53:36,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 209 transitions, 2593 flow [2024-06-27 20:53:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:53:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:53:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:53:36,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-27 20:53:36,948 INFO L175 Difference]: Start difference. First operand has 120 places, 190 transitions, 2155 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:53:36,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 209 transitions, 2593 flow [2024-06-27 20:53:37,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 209 transitions, 2545 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:37,008 INFO L231 Difference]: Finished difference. Result has 123 places, 192 transitions, 2174 flow [2024-06-27 20:53:37,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2174, PETRI_PLACES=123, PETRI_TRANSITIONS=192} [2024-06-27 20:53:37,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-27 20:53:37,009 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 192 transitions, 2174 flow [2024-06-27 20:53:37,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:37,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:37,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:37,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:53:37,010 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:37,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -816385509, now seen corresponding path program 2 times [2024-06-27 20:53:37,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124728217] [2024-06-27 20:53:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:38,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124728217] [2024-06-27 20:53:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124728217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:38,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:53:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770487919] [2024-06-27 20:53:38,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:38,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:53:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:53:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:53:38,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-27 20:53:38,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 192 transitions, 2174 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:38,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:38,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-27 20:53:38,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:38,655 INFO L124 PetriNetUnfolderBase]: 1836/2759 cut-off events. [2024-06-27 20:53:38,655 INFO L125 PetriNetUnfolderBase]: For 42523/42598 co-relation queries the response was YES. [2024-06-27 20:53:38,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19083 conditions, 2759 events. 1836/2759 cut-off events. For 42523/42598 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13121 event pairs, 440 based on Foata normal form. 15/2734 useless extension candidates. Maximal degree in co-relation 19021. Up to 2485 conditions per place. [2024-06-27 20:53:38,676 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 148 selfloop transitions, 36 changer transitions 0/210 dead transitions. [2024-06-27 20:53:38,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 210 transitions, 2616 flow [2024-06-27 20:53:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:53:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:53:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:53:38,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 20:53:38,677 INFO L175 Difference]: Start difference. First operand has 123 places, 192 transitions, 2174 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:53:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 210 transitions, 2616 flow [2024-06-27 20:53:38,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 210 transitions, 2581 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:53:38,736 INFO L231 Difference]: Finished difference. Result has 125 places, 194 transitions, 2262 flow [2024-06-27 20:53:38,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2262, PETRI_PLACES=125, PETRI_TRANSITIONS=194} [2024-06-27 20:53:38,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-27 20:53:38,737 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 194 transitions, 2262 flow [2024-06-27 20:53:38,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:38,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:38,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:38,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:53:38,738 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:38,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1065731219, now seen corresponding path program 1 times [2024-06-27 20:53:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124188639] [2024-06-27 20:53:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:39,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:39,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124188639] [2024-06-27 20:53:39,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124188639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:39,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:39,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:39,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148007670] [2024-06-27 20:53:39,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:39,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:39,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 194 transitions, 2262 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:39,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:39,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:39,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:40,656 INFO L124 PetriNetUnfolderBase]: 1922/2881 cut-off events. [2024-06-27 20:53:40,656 INFO L125 PetriNetUnfolderBase]: For 47586/47586 co-relation queries the response was YES. [2024-06-27 20:53:40,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20241 conditions, 2881 events. 1922/2881 cut-off events. For 47586/47586 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13720 event pairs, 404 based on Foata normal form. 5/2882 useless extension candidates. Maximal degree in co-relation 20178. Up to 2491 conditions per place. [2024-06-27 20:53:40,679 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 148 selfloop transitions, 85 changer transitions 0/237 dead transitions. [2024-06-27 20:53:40,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 3141 flow [2024-06-27 20:53:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:53:40,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-27 20:53:40,681 INFO L175 Difference]: Start difference. First operand has 125 places, 194 transitions, 2262 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:53:40,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 3141 flow [2024-06-27 20:53:40,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 237 transitions, 3058 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:53:40,745 INFO L231 Difference]: Finished difference. Result has 133 places, 208 transitions, 2695 flow [2024-06-27 20:53:40,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2695, PETRI_PLACES=133, PETRI_TRANSITIONS=208} [2024-06-27 20:53:40,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-27 20:53:40,746 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 208 transitions, 2695 flow [2024-06-27 20:53:40,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:53:40,746 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:40,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 705638807, now seen corresponding path program 2 times [2024-06-27 20:53:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897841206] [2024-06-27 20:53:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:42,012 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 20:53:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897841206] [2024-06-27 20:53:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897841206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:42,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875172775] [2024-06-27 20:53:42,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:42,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:42,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:42,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 208 transitions, 2695 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:42,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:42,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:42,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:42,902 INFO L124 PetriNetUnfolderBase]: 1982/2978 cut-off events. [2024-06-27 20:53:42,902 INFO L125 PetriNetUnfolderBase]: For 53997/54004 co-relation queries the response was YES. [2024-06-27 20:53:42,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22338 conditions, 2978 events. 1982/2978 cut-off events. For 53997/54004 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14267 event pairs, 446 based on Foata normal form. 11/2987 useless extension candidates. Maximal degree in co-relation 22271. Up to 2658 conditions per place. [2024-06-27 20:53:42,929 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 188 selfloop transitions, 63 changer transitions 0/255 dead transitions. [2024-06-27 20:53:42,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 255 transitions, 3576 flow [2024-06-27 20:53:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:53:42,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-27 20:53:42,931 INFO L175 Difference]: Start difference. First operand has 133 places, 208 transitions, 2695 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:53:42,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 255 transitions, 3576 flow [2024-06-27 20:53:43,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 255 transitions, 3454 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:43,033 INFO L231 Difference]: Finished difference. Result has 140 places, 223 transitions, 2976 flow [2024-06-27 20:53:43,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=140, PETRI_TRANSITIONS=223} [2024-06-27 20:53:43,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 20:53:43,033 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 223 transitions, 2976 flow [2024-06-27 20:53:43,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:43,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:43,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:53:43,034 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:43,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 705645565, now seen corresponding path program 1 times [2024-06-27 20:53:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494716109] [2024-06-27 20:53:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:43,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:43,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494716109] [2024-06-27 20:53:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494716109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:43,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:43,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:43,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090153857] [2024-06-27 20:53:43,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:43,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:43,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:44,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:44,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 223 transitions, 2976 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:44,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:44,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:44,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:44,873 INFO L124 PetriNetUnfolderBase]: 2478/3785 cut-off events. [2024-06-27 20:53:44,873 INFO L125 PetriNetUnfolderBase]: For 88829/88836 co-relation queries the response was YES. [2024-06-27 20:53:44,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28111 conditions, 3785 events. 2478/3785 cut-off events. For 88829/88836 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19591 event pairs, 535 based on Foata normal form. 117/3900 useless extension candidates. Maximal degree in co-relation 28041. Up to 2653 conditions per place. [2024-06-27 20:53:44,905 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 187 selfloop transitions, 86 changer transitions 0/277 dead transitions. [2024-06-27 20:53:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 277 transitions, 4022 flow [2024-06-27 20:53:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:53:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-27 20:53:44,913 INFO L175 Difference]: Start difference. First operand has 140 places, 223 transitions, 2976 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:53:44,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 277 transitions, 4022 flow [2024-06-27 20:53:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 277 transitions, 3822 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:45,027 INFO L231 Difference]: Finished difference. Result has 145 places, 238 transitions, 3306 flow [2024-06-27 20:53:45,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3306, PETRI_PLACES=145, PETRI_TRANSITIONS=238} [2024-06-27 20:53:45,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 20:53:45,028 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 238 transitions, 3306 flow [2024-06-27 20:53:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:45,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:45,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:53:45,028 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:45,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash -154418505, now seen corresponding path program 3 times [2024-06-27 20:53:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:45,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658103153] [2024-06-27 20:53:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:45,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:46,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:46,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658103153] [2024-06-27 20:53:46,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658103153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:46,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:46,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:46,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540134636] [2024-06-27 20:53:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:46,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:46,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:46,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:46,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:46,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 238 transitions, 3306 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:46,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:46,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:46,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:47,237 INFO L124 PetriNetUnfolderBase]: 2508/3841 cut-off events. [2024-06-27 20:53:47,237 INFO L125 PetriNetUnfolderBase]: For 86435/86442 co-relation queries the response was YES. [2024-06-27 20:53:47,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30056 conditions, 3841 events. 2508/3841 cut-off events. For 86435/86442 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20019 event pairs, 595 based on Foata normal form. 11/3850 useless extension candidates. Maximal degree in co-relation 29984. Up to 3416 conditions per place. [2024-06-27 20:53:47,272 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 190 selfloop transitions, 86 changer transitions 0/280 dead transitions. [2024-06-27 20:53:47,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 280 transitions, 4159 flow [2024-06-27 20:53:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:53:47,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-27 20:53:47,274 INFO L175 Difference]: Start difference. First operand has 145 places, 238 transitions, 3306 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:53:47,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 280 transitions, 4159 flow [2024-06-27 20:53:47,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 280 transitions, 3980 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:53:47,424 INFO L231 Difference]: Finished difference. Result has 150 places, 243 transitions, 3444 flow [2024-06-27 20:53:47,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3444, PETRI_PLACES=150, PETRI_TRANSITIONS=243} [2024-06-27 20:53:47,425 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 20:53:47,425 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 243 transitions, 3444 flow [2024-06-27 20:53:47,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:47,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:47,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:53:47,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:47,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 619697399, now seen corresponding path program 4 times [2024-06-27 20:53:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:47,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368700945] [2024-06-27 20:53:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368700945] [2024-06-27 20:53:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368700945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:48,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730676910] [2024-06-27 20:53:48,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:48,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:48,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 243 transitions, 3444 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:48,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:48,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:48,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:49,369 INFO L124 PetriNetUnfolderBase]: 2562/3927 cut-off events. [2024-06-27 20:53:49,369 INFO L125 PetriNetUnfolderBase]: For 93480/93480 co-relation queries the response was YES. [2024-06-27 20:53:49,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31390 conditions, 3927 events. 2562/3927 cut-off events. For 93480/93480 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20681 event pairs, 591 based on Foata normal form. 5/3928 useless extension candidates. Maximal degree in co-relation 31316. Up to 3520 conditions per place. [2024-06-27 20:53:49,408 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 209 selfloop transitions, 75 changer transitions 0/288 dead transitions. [2024-06-27 20:53:49,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 288 transitions, 4510 flow [2024-06-27 20:53:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:53:49,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 20:53:49,409 INFO L175 Difference]: Start difference. First operand has 150 places, 243 transitions, 3444 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:53:49,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 288 transitions, 4510 flow [2024-06-27 20:53:49,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 288 transitions, 4231 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:49,555 INFO L231 Difference]: Finished difference. Result has 152 places, 252 transitions, 3570 flow [2024-06-27 20:53:49,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3165, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3570, PETRI_PLACES=152, PETRI_TRANSITIONS=252} [2024-06-27 20:53:49,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-27 20:53:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 252 transitions, 3570 flow [2024-06-27 20:53:49,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:49,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:49,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:53:49,556 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:49,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1559756389, now seen corresponding path program 2 times [2024-06-27 20:53:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:49,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890679443] [2024-06-27 20:53:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890679443] [2024-06-27 20:53:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890679443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:50,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:50,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610019605] [2024-06-27 20:53:50,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:50,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:50,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:50,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:50,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 252 transitions, 3570 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:50,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:50,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:50,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:51,440 INFO L124 PetriNetUnfolderBase]: 2654/4094 cut-off events. [2024-06-27 20:53:51,441 INFO L125 PetriNetUnfolderBase]: For 109120/109127 co-relation queries the response was YES. [2024-06-27 20:53:51,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32866 conditions, 4094 events. 2654/4094 cut-off events. For 109120/109127 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21877 event pairs, 656 based on Foata normal form. 30/4122 useless extension candidates. Maximal degree in co-relation 32791. Up to 3695 conditions per place. [2024-06-27 20:53:51,472 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 244 selfloop transitions, 43 changer transitions 0/291 dead transitions. [2024-06-27 20:53:51,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 291 transitions, 4388 flow [2024-06-27 20:53:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:53:51,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:53:51,474 INFO L175 Difference]: Start difference. First operand has 152 places, 252 transitions, 3570 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:53:51,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 291 transitions, 4388 flow [2024-06-27 20:53:51,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 291 transitions, 4165 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:51,617 INFO L231 Difference]: Finished difference. Result has 155 places, 254 transitions, 3498 flow [2024-06-27 20:53:51,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3498, PETRI_PLACES=155, PETRI_TRANSITIONS=254} [2024-06-27 20:53:51,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-27 20:53:51,617 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 254 transitions, 3498 flow [2024-06-27 20:53:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:51,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:51,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:51,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:53:51,618 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:51,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 847598549, now seen corresponding path program 5 times [2024-06-27 20:53:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:51,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016934326] [2024-06-27 20:53:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:52,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016934326] [2024-06-27 20:53:52,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016934326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:52,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:52,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327706365] [2024-06-27 20:53:52,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:52,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:52,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 254 transitions, 3498 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:52,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:52,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:52,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:53,709 INFO L124 PetriNetUnfolderBase]: 2665/4115 cut-off events. [2024-06-27 20:53:53,709 INFO L125 PetriNetUnfolderBase]: For 107747/107754 co-relation queries the response was YES. [2024-06-27 20:53:53,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33164 conditions, 4115 events. 2665/4115 cut-off events. For 107747/107754 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22094 event pairs, 656 based on Foata normal form. 8/4121 useless extension candidates. Maximal degree in co-relation 33087. Up to 3840 conditions per place. [2024-06-27 20:53:53,744 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 244 selfloop transitions, 47 changer transitions 0/295 dead transitions. [2024-06-27 20:53:53,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 295 transitions, 4321 flow [2024-06-27 20:53:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:53:53,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 20:53:53,746 INFO L175 Difference]: Start difference. First operand has 155 places, 254 transitions, 3498 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:53:53,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 295 transitions, 4321 flow [2024-06-27 20:53:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 295 transitions, 4204 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:53:53,887 INFO L231 Difference]: Finished difference. Result has 159 places, 260 transitions, 3622 flow [2024-06-27 20:53:53,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3622, PETRI_PLACES=159, PETRI_TRANSITIONS=260} [2024-06-27 20:53:53,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 20:53:53,888 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 260 transitions, 3622 flow [2024-06-27 20:53:53,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:53,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:53,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:53:53,889 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:53,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1551482427, now seen corresponding path program 6 times [2024-06-27 20:53:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216958598] [2024-06-27 20:53:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:54,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:54,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216958598] [2024-06-27 20:53:54,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216958598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:54,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:54,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:54,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223267747] [2024-06-27 20:53:54,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:54,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:54,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:54,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:54,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:54,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:54,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 260 transitions, 3622 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:54,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:54,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:54,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:55,707 INFO L124 PetriNetUnfolderBase]: 2660/4105 cut-off events. [2024-06-27 20:53:55,707 INFO L125 PetriNetUnfolderBase]: For 110258/110258 co-relation queries the response was YES. [2024-06-27 20:53:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33433 conditions, 4105 events. 2660/4105 cut-off events. For 110258/110258 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22069 event pairs, 658 based on Foata normal form. 2/4103 useless extension candidates. Maximal degree in co-relation 33354. Up to 3699 conditions per place. [2024-06-27 20:53:55,750 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 222 selfloop transitions, 83 changer transitions 0/309 dead transitions. [2024-06-27 20:53:55,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 309 transitions, 4684 flow [2024-06-27 20:53:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:53:55,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 20:53:55,751 INFO L175 Difference]: Start difference. First operand has 159 places, 260 transitions, 3622 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:53:55,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 309 transitions, 4684 flow [2024-06-27 20:53:55,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 309 transitions, 4502 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:53:55,927 INFO L231 Difference]: Finished difference. Result has 166 places, 276 transitions, 3984 flow [2024-06-27 20:53:55,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3984, PETRI_PLACES=166, PETRI_TRANSITIONS=276} [2024-06-27 20:53:55,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 20:53:55,928 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 276 transitions, 3984 flow [2024-06-27 20:53:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:55,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:55,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:55,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:53:55,928 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:55,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash 855873007, now seen corresponding path program 3 times [2024-06-27 20:53:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867911966] [2024-06-27 20:53:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:55,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867911966] [2024-06-27 20:53:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867911966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:56,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:56,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221904866] [2024-06-27 20:53:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:56,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:56,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:56,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 276 transitions, 3984 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:56,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:56,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:56,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:57,754 INFO L124 PetriNetUnfolderBase]: 2677/4135 cut-off events. [2024-06-27 20:53:57,755 INFO L125 PetriNetUnfolderBase]: For 120251/120258 co-relation queries the response was YES. [2024-06-27 20:53:57,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34577 conditions, 4135 events. 2677/4135 cut-off events. For 120251/120258 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22216 event pairs, 656 based on Foata normal form. 10/4143 useless extension candidates. Maximal degree in co-relation 34492. Up to 3648 conditions per place. [2024-06-27 20:53:57,797 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 248 selfloop transitions, 68 changer transitions 0/320 dead transitions. [2024-06-27 20:53:57,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 320 transitions, 4978 flow [2024-06-27 20:53:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:53:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:53:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:53:57,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 20:53:57,799 INFO L175 Difference]: Start difference. First operand has 166 places, 276 transitions, 3984 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:53:57,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 320 transitions, 4978 flow [2024-06-27 20:53:58,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 320 transitions, 4826 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-27 20:53:58,032 INFO L231 Difference]: Finished difference. Result has 174 places, 278 transitions, 4046 flow [2024-06-27 20:53:58,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4046, PETRI_PLACES=174, PETRI_TRANSITIONS=278} [2024-06-27 20:53:58,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 20:53:58,033 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 278 transitions, 4046 flow [2024-06-27 20:53:58,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:58,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:58,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:58,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:53:58,034 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:58,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash 856169677, now seen corresponding path program 4 times [2024-06-27 20:53:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:58,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505285733] [2024-06-27 20:53:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:58,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:58,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505285733] [2024-06-27 20:53:58,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505285733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:58,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:58,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146903227] [2024-06-27 20:53:58,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:58,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:58,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:58,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:59,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:53:59,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 278 transitions, 4046 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:59,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:59,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:53:59,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:59,823 INFO L124 PetriNetUnfolderBase]: 2805/4343 cut-off events. [2024-06-27 20:53:59,823 INFO L125 PetriNetUnfolderBase]: For 137528/137535 co-relation queries the response was YES. [2024-06-27 20:53:59,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37233 conditions, 4343 events. 2805/4343 cut-off events. For 137528/137535 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23602 event pairs, 649 based on Foata normal form. 10/4351 useless extension candidates. Maximal degree in co-relation 37145. Up to 3468 conditions per place. [2024-06-27 20:53:59,867 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 246 selfloop transitions, 74 changer transitions 0/324 dead transitions. [2024-06-27 20:53:59,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 324 transitions, 5231 flow [2024-06-27 20:53:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:53:59,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 20:53:59,868 INFO L175 Difference]: Start difference. First operand has 174 places, 278 transitions, 4046 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:53:59,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 324 transitions, 5231 flow [2024-06-27 20:54:00,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 324 transitions, 5038 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:00,234 INFO L231 Difference]: Finished difference. Result has 177 places, 283 transitions, 4195 flow [2024-06-27 20:54:00,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4195, PETRI_PLACES=177, PETRI_TRANSITIONS=283} [2024-06-27 20:54:00,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-27 20:54:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 283 transitions, 4195 flow [2024-06-27 20:54:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:00,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:00,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:54:00,235 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:00,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash 619697647, now seen corresponding path program 5 times [2024-06-27 20:54:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:00,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184064120] [2024-06-27 20:54:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:00,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:01,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:01,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184064120] [2024-06-27 20:54:01,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184064120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:01,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:01,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9568365] [2024-06-27 20:54:01,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:01,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:01,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:01,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:01,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 283 transitions, 4195 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:02,279 INFO L124 PetriNetUnfolderBase]: 3043/4731 cut-off events. [2024-06-27 20:54:02,280 INFO L125 PetriNetUnfolderBase]: For 163406/163413 co-relation queries the response was YES. [2024-06-27 20:54:02,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39174 conditions, 4731 events. 3043/4731 cut-off events. For 163406/163413 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26388 event pairs, 745 based on Foata normal form. 103/4832 useless extension candidates. Maximal degree in co-relation 39084. Up to 3780 conditions per place. [2024-06-27 20:54:02,326 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 253 selfloop transitions, 68 changer transitions 0/325 dead transitions. [2024-06-27 20:54:02,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 325 transitions, 5143 flow [2024-06-27 20:54:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:54:02,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-27 20:54:02,327 INFO L175 Difference]: Start difference. First operand has 177 places, 283 transitions, 4195 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:54:02,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 325 transitions, 5143 flow [2024-06-27 20:54:02,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 325 transitions, 4875 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:02,599 INFO L231 Difference]: Finished difference. Result has 182 places, 285 transitions, 4161 flow [2024-06-27 20:54:02,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3929, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4161, PETRI_PLACES=182, PETRI_TRANSITIONS=285} [2024-06-27 20:54:02,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 20:54:02,600 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 285 transitions, 4161 flow [2024-06-27 20:54:02,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:02,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:02,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:54:02,601 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -639912637, now seen corresponding path program 1 times [2024-06-27 20:54:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:02,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789122548] [2024-06-27 20:54:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:03,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789122548] [2024-06-27 20:54:03,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789122548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:03,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:03,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777093948] [2024-06-27 20:54:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:03,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:03,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:03,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 285 transitions, 4161 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:03,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:03,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:03,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:04,670 INFO L124 PetriNetUnfolderBase]: 3227/5015 cut-off events. [2024-06-27 20:54:04,670 INFO L125 PetriNetUnfolderBase]: For 155617/155617 co-relation queries the response was YES. [2024-06-27 20:54:04,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41547 conditions, 5015 events. 3227/5015 cut-off events. For 155617/155617 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28206 event pairs, 659 based on Foata normal form. 14/5025 useless extension candidates. Maximal degree in co-relation 41455. Up to 4586 conditions per place. [2024-06-27 20:54:04,725 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 297 selfloop transitions, 28 changer transitions 0/329 dead transitions. [2024-06-27 20:54:04,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 329 transitions, 5297 flow [2024-06-27 20:54:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:54:04,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-27 20:54:04,726 INFO L175 Difference]: Start difference. First operand has 182 places, 285 transitions, 4161 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:54:04,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 329 transitions, 5297 flow [2024-06-27 20:54:05,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 329 transitions, 5163 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:05,026 INFO L231 Difference]: Finished difference. Result has 185 places, 296 transitions, 4356 flow [2024-06-27 20:54:05,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4356, PETRI_PLACES=185, PETRI_TRANSITIONS=296} [2024-06-27 20:54:05,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 20:54:05,027 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 296 transitions, 4356 flow [2024-06-27 20:54:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:05,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:05,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:54:05,027 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:05,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1321918051, now seen corresponding path program 2 times [2024-06-27 20:54:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540962031] [2024-06-27 20:54:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540962031] [2024-06-27 20:54:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540962031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085092984] [2024-06-27 20:54:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:05,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 296 transitions, 4356 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:05,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:05,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:05,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:07,232 INFO L124 PetriNetUnfolderBase]: 3556/5516 cut-off events. [2024-06-27 20:54:07,232 INFO L125 PetriNetUnfolderBase]: For 189975/189975 co-relation queries the response was YES. [2024-06-27 20:54:07,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46718 conditions, 5516 events. 3556/5516 cut-off events. For 189975/189975 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 31487 event pairs, 810 based on Foata normal form. 20/5532 useless extension candidates. Maximal degree in co-relation 46623. Up to 4558 conditions per place. [2024-06-27 20:54:07,281 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 274 selfloop transitions, 73 changer transitions 0/351 dead transitions. [2024-06-27 20:54:07,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 5839 flow [2024-06-27 20:54:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:54:07,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 20:54:07,283 INFO L175 Difference]: Start difference. First operand has 185 places, 296 transitions, 4356 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:54:07,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 5839 flow [2024-06-27 20:54:07,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 351 transitions, 5705 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 20:54:07,655 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 4670 flow [2024-06-27 20:54:07,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4222, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4670, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2024-06-27 20:54:07,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-27 20:54:07,656 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 4670 flow [2024-06-27 20:54:07,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:07,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:07,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:07,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:54:07,657 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:07,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1322065921, now seen corresponding path program 3 times [2024-06-27 20:54:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:07,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928332815] [2024-06-27 20:54:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928332815] [2024-06-27 20:54:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928332815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:08,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444123156] [2024-06-27 20:54:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:08,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:08,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:08,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:08,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 4670 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:08,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:08,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:08,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:10,230 INFO L124 PetriNetUnfolderBase]: 3592/5576 cut-off events. [2024-06-27 20:54:10,231 INFO L125 PetriNetUnfolderBase]: For 198431/198431 co-relation queries the response was YES. [2024-06-27 20:54:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48022 conditions, 5576 events. 3592/5576 cut-off events. For 198431/198431 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31944 event pairs, 868 based on Foata normal form. 16/5588 useless extension candidates. Maximal degree in co-relation 47924. Up to 4971 conditions per place. [2024-06-27 20:54:10,332 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 258 selfloop transitions, 82 changer transitions 0/344 dead transitions. [2024-06-27 20:54:10,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 344 transitions, 5724 flow [2024-06-27 20:54:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:54:10,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-27 20:54:10,334 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 4670 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:54:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 344 transitions, 5724 flow [2024-06-27 20:54:10,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 344 transitions, 5530 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:10,833 INFO L231 Difference]: Finished difference. Result has 195 places, 311 transitions, 4787 flow [2024-06-27 20:54:10,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4787, PETRI_PLACES=195, PETRI_TRANSITIONS=311} [2024-06-27 20:54:10,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-27 20:54:10,834 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 311 transitions, 4787 flow [2024-06-27 20:54:10,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:10,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:10,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:10,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:54:10,835 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:10,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 462008051, now seen corresponding path program 1 times [2024-06-27 20:54:10,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:10,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890276889] [2024-06-27 20:54:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:11,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890276889] [2024-06-27 20:54:11,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890276889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:11,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642518870] [2024-06-27 20:54:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:12,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:12,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 311 transitions, 4787 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:12,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:12,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:12,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:13,616 INFO L124 PetriNetUnfolderBase]: 3947/6172 cut-off events. [2024-06-27 20:54:13,616 INFO L125 PetriNetUnfolderBase]: For 242217/242217 co-relation queries the response was YES. [2024-06-27 20:54:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52330 conditions, 6172 events. 3947/6172 cut-off events. For 242217/242217 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 36328 event pairs, 944 based on Foata normal form. 74/6242 useless extension candidates. Maximal degree in co-relation 52230. Up to 5112 conditions per place. [2024-06-27 20:54:13,686 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 245 selfloop transitions, 109 changer transitions 0/358 dead transitions. [2024-06-27 20:54:13,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 358 transitions, 6020 flow [2024-06-27 20:54:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:54:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-06-27 20:54:13,688 INFO L175 Difference]: Start difference. First operand has 195 places, 311 transitions, 4787 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:54:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 358 transitions, 6020 flow [2024-06-27 20:54:14,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 358 transitions, 5818 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:14,254 INFO L231 Difference]: Finished difference. Result has 199 places, 319 transitions, 5038 flow [2024-06-27 20:54:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5038, PETRI_PLACES=199, PETRI_TRANSITIONS=319} [2024-06-27 20:54:14,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-27 20:54:14,254 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 319 transitions, 5038 flow [2024-06-27 20:54:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:54:14,255 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:14,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 400169641, now seen corresponding path program 2 times [2024-06-27 20:54:14,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315984048] [2024-06-27 20:54:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:14,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:15,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315984048] [2024-06-27 20:54:15,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315984048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:15,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309495725] [2024-06-27 20:54:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:15,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:15,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 319 transitions, 5038 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:15,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:15,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:17,291 INFO L124 PetriNetUnfolderBase]: 4246/6689 cut-off events. [2024-06-27 20:54:17,291 INFO L125 PetriNetUnfolderBase]: For 265001/265008 co-relation queries the response was YES. [2024-06-27 20:54:17,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56928 conditions, 6689 events. 4246/6689 cut-off events. For 265001/265008 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 40586 event pairs, 1098 based on Foata normal form. 64/6751 useless extension candidates. Maximal degree in co-relation 56827. Up to 5774 conditions per place. [2024-06-27 20:54:17,357 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 275 selfloop transitions, 93 changer transitions 0/372 dead transitions. [2024-06-27 20:54:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 372 transitions, 6230 flow [2024-06-27 20:54:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:54:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:54:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:54:17,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 20:54:17,358 INFO L175 Difference]: Start difference. First operand has 199 places, 319 transitions, 5038 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:54:17,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 372 transitions, 6230 flow [2024-06-27 20:54:17,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 372 transitions, 5972 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:17,911 INFO L231 Difference]: Finished difference. Result has 202 places, 324 transitions, 5128 flow [2024-06-27 20:54:17,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5128, PETRI_PLACES=202, PETRI_TRANSITIONS=324} [2024-06-27 20:54:17,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-27 20:54:17,912 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 324 transitions, 5128 flow [2024-06-27 20:54:17,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:17,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:17,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:54:17,912 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:17,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -491997625, now seen corresponding path program 3 times [2024-06-27 20:54:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674780623] [2024-06-27 20:54:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:18,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:18,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674780623] [2024-06-27 20:54:18,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674780623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:18,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:18,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:18,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839036531] [2024-06-27 20:54:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:19,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:19,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 324 transitions, 5128 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:19,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:19,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:19,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:20,654 INFO L124 PetriNetUnfolderBase]: 4532/7229 cut-off events. [2024-06-27 20:54:20,654 INFO L125 PetriNetUnfolderBase]: For 284656/284663 co-relation queries the response was YES. [2024-06-27 20:54:20,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60925 conditions, 7229 events. 4532/7229 cut-off events. For 284656/284663 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 45148 event pairs, 1084 based on Foata normal form. 54/7281 useless extension candidates. Maximal degree in co-relation 60823. Up to 4905 conditions per place. [2024-06-27 20:54:20,731 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 268 selfloop transitions, 106 changer transitions 0/378 dead transitions. [2024-06-27 20:54:20,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 378 transitions, 6463 flow [2024-06-27 20:54:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:54:20,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 20:54:20,732 INFO L175 Difference]: Start difference. First operand has 202 places, 324 transitions, 5128 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:54:20,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 378 transitions, 6463 flow [2024-06-27 20:54:21,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 378 transitions, 6250 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 20:54:21,408 INFO L231 Difference]: Finished difference. Result has 203 places, 327 transitions, 5250 flow [2024-06-27 20:54:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5250, PETRI_PLACES=203, PETRI_TRANSITIONS=327} [2024-06-27 20:54:21,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-27 20:54:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 327 transitions, 5250 flow [2024-06-27 20:54:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:21,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:21,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:54:21,409 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:21,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2025033467, now seen corresponding path program 4 times [2024-06-27 20:54:21,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:21,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067149492] [2024-06-27 20:54:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:22,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067149492] [2024-06-27 20:54:22,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067149492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:22,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650147783] [2024-06-27 20:54:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:22,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:22,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:22,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:22,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 327 transitions, 5250 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:22,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:22,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:22,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:23,893 INFO L124 PetriNetUnfolderBase]: 4707/7488 cut-off events. [2024-06-27 20:54:23,893 INFO L125 PetriNetUnfolderBase]: For 294102/294109 co-relation queries the response was YES. [2024-06-27 20:54:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63829 conditions, 7488 events. 4707/7488 cut-off events. For 294102/294109 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47319 event pairs, 1357 based on Foata normal form. 22/7508 useless extension candidates. Maximal degree in co-relation 63726. Up to 6768 conditions per place. [2024-06-27 20:54:23,973 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 327 selfloop transitions, 57 changer transitions 0/388 dead transitions. [2024-06-27 20:54:23,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 388 transitions, 6757 flow [2024-06-27 20:54:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:54:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:54:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:54:23,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 20:54:23,975 INFO L175 Difference]: Start difference. First operand has 203 places, 327 transitions, 5250 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:54:23,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 388 transitions, 6757 flow [2024-06-27 20:54:24,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 388 transitions, 6499 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:24,709 INFO L231 Difference]: Finished difference. Result has 207 places, 335 transitions, 5379 flow [2024-06-27 20:54:24,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5379, PETRI_PLACES=207, PETRI_TRANSITIONS=335} [2024-06-27 20:54:24,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-27 20:54:24,710 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 335 transitions, 5379 flow [2024-06-27 20:54:24,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:24,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:24,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:24,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:54:24,711 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:24,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:24,711 INFO L85 PathProgramCache]: Analyzing trace with hash 762253047, now seen corresponding path program 4 times [2024-06-27 20:54:24,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:24,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142166766] [2024-06-27 20:54:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:24,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:25,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142166766] [2024-06-27 20:54:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142166766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:25,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:25,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000201402] [2024-06-27 20:54:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:25,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:25,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 335 transitions, 5379 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:25,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:25,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:25,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:27,375 INFO L124 PetriNetUnfolderBase]: 4684/7465 cut-off events. [2024-06-27 20:54:27,376 INFO L125 PetriNetUnfolderBase]: For 296562/296562 co-relation queries the response was YES. [2024-06-27 20:54:27,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63489 conditions, 7465 events. 4684/7465 cut-off events. For 296562/296562 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 47262 event pairs, 1401 based on Foata normal form. 16/7477 useless extension candidates. Maximal degree in co-relation 63384. Up to 6914 conditions per place. [2024-06-27 20:54:27,451 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 287 selfloop transitions, 84 changer transitions 0/375 dead transitions. [2024-06-27 20:54:27,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 375 transitions, 6355 flow [2024-06-27 20:54:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:54:27,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:54:27,453 INFO L175 Difference]: Start difference. First operand has 207 places, 335 transitions, 5379 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:54:27,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 375 transitions, 6355 flow [2024-06-27 20:54:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 375 transitions, 6159 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:28,192 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 5415 flow [2024-06-27 20:54:28,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5186, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5415, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2024-06-27 20:54:28,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 20:54:28,192 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 5415 flow [2024-06-27 20:54:28,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:28,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:28,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:54:28,193 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:28,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash 417192185, now seen corresponding path program 5 times [2024-06-27 20:54:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004711300] [2024-06-27 20:54:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004711300] [2024-06-27 20:54:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004711300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:29,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:29,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:29,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498675881] [2024-06-27 20:54:29,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:29,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:29,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:29,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:29,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:29,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 5415 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:29,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:31,203 INFO L124 PetriNetUnfolderBase]: 5194/8353 cut-off events. [2024-06-27 20:54:31,203 INFO L125 PetriNetUnfolderBase]: For 386297/386304 co-relation queries the response was YES. [2024-06-27 20:54:31,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71867 conditions, 8353 events. 5194/8353 cut-off events. For 386297/386304 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 54429 event pairs, 1423 based on Foata normal form. 60/8411 useless extension candidates. Maximal degree in co-relation 71761. Up to 6417 conditions per place. [2024-06-27 20:54:31,298 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 312 selfloop transitions, 79 changer transitions 0/395 dead transitions. [2024-06-27 20:54:31,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 395 transitions, 6976 flow [2024-06-27 20:54:31,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:54:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:54:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:54:31,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-27 20:54:31,300 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 5415 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:54:31,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 395 transitions, 6976 flow [2024-06-27 20:54:32,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 395 transitions, 6773 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:32,179 INFO L231 Difference]: Finished difference. Result has 213 places, 341 transitions, 5607 flow [2024-06-27 20:54:32,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5607, PETRI_PLACES=213, PETRI_TRANSITIONS=341} [2024-06-27 20:54:32,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 20:54:32,180 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 341 transitions, 5607 flow [2024-06-27 20:54:32,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:32,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:32,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:32,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:54:32,181 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:32,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash 771457257, now seen corresponding path program 6 times [2024-06-27 20:54:32,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:32,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32153602] [2024-06-27 20:54:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:32,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:33,188 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 20:54:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:33,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32153602] [2024-06-27 20:54:33,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32153602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:33,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:33,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:33,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937309011] [2024-06-27 20:54:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:33,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:33,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:33,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 341 transitions, 5607 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:33,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:33,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:33,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:35,123 INFO L124 PetriNetUnfolderBase]: 5296/8539 cut-off events. [2024-06-27 20:54:35,123 INFO L125 PetriNetUnfolderBase]: For 392258/392265 co-relation queries the response was YES. [2024-06-27 20:54:35,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74225 conditions, 8539 events. 5296/8539 cut-off events. For 392258/392265 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 56142 event pairs, 1639 based on Foata normal form. 18/8555 useless extension candidates. Maximal degree in co-relation 74118. Up to 6886 conditions per place. [2024-06-27 20:54:35,210 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 299 selfloop transitions, 89 changer transitions 0/392 dead transitions. [2024-06-27 20:54:35,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 392 transitions, 6939 flow [2024-06-27 20:54:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:54:35,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-27 20:54:35,211 INFO L175 Difference]: Start difference. First operand has 213 places, 341 transitions, 5607 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:54:35,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 392 transitions, 6939 flow [2024-06-27 20:54:36,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 392 transitions, 6763 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:36,079 INFO L231 Difference]: Finished difference. Result has 216 places, 343 transitions, 5729 flow [2024-06-27 20:54:36,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5729, PETRI_PLACES=216, PETRI_TRANSITIONS=343} [2024-06-27 20:54:36,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 20:54:36,080 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 343 transitions, 5729 flow [2024-06-27 20:54:36,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:36,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:36,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:36,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:54:36,080 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:36,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:36,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2030751479, now seen corresponding path program 7 times [2024-06-27 20:54:36,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:36,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774238396] [2024-06-27 20:54:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:36,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:37,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:37,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774238396] [2024-06-27 20:54:37,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774238396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:37,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:37,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:37,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510093793] [2024-06-27 20:54:37,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:37,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:37,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 343 transitions, 5729 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:37,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:37,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:39,571 INFO L124 PetriNetUnfolderBase]: 5401/8727 cut-off events. [2024-06-27 20:54:39,571 INFO L125 PetriNetUnfolderBase]: For 406075/406082 co-relation queries the response was YES. [2024-06-27 20:54:39,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74092 conditions, 8727 events. 5401/8727 cut-off events. For 406075/406082 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57863 event pairs, 1678 based on Foata normal form. 64/8789 useless extension candidates. Maximal degree in co-relation 73983. Up to 7747 conditions per place. [2024-06-27 20:54:39,655 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 314 selfloop transitions, 84 changer transitions 0/402 dead transitions. [2024-06-27 20:54:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 402 transitions, 7014 flow [2024-06-27 20:54:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:54:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:54:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-27 20:54:39,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-27 20:54:39,657 INFO L175 Difference]: Start difference. First operand has 216 places, 343 transitions, 5729 flow. Second operand 12 states and 231 transitions. [2024-06-27 20:54:39,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 402 transitions, 7014 flow [2024-06-27 20:54:40,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 402 transitions, 6900 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:40,485 INFO L231 Difference]: Finished difference. Result has 222 places, 353 transitions, 5989 flow [2024-06-27 20:54:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5989, PETRI_PLACES=222, PETRI_TRANSITIONS=353} [2024-06-27 20:54:40,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-27 20:54:40,486 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 353 transitions, 5989 flow [2024-06-27 20:54:40,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:40,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:40,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:54:40,487 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:40,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:40,487 INFO L85 PathProgramCache]: Analyzing trace with hash 505752537, now seen corresponding path program 8 times [2024-06-27 20:54:40,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:40,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552544364] [2024-06-27 20:54:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:41,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:41,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552544364] [2024-06-27 20:54:41,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552544364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:41,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:41,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:41,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043785281] [2024-06-27 20:54:41,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:41,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:41,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:41,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:41,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 353 transitions, 5989 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:41,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:41,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:41,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:43,641 INFO L124 PetriNetUnfolderBase]: 5434/8808 cut-off events. [2024-06-27 20:54:43,641 INFO L125 PetriNetUnfolderBase]: For 384924/384931 co-relation queries the response was YES. [2024-06-27 20:54:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74920 conditions, 8808 events. 5434/8808 cut-off events. For 384924/384931 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 58855 event pairs, 1757 based on Foata normal form. 22/8828 useless extension candidates. Maximal degree in co-relation 74810. Up to 8291 conditions per place. [2024-06-27 20:54:43,752 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 342 selfloop transitions, 53 changer transitions 0/399 dead transitions. [2024-06-27 20:54:43,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 399 transitions, 7069 flow [2024-06-27 20:54:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:54:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:54:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 20:54:43,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:54:43,754 INFO L175 Difference]: Start difference. First operand has 222 places, 353 transitions, 5989 flow. Second operand 11 states and 195 transitions. [2024-06-27 20:54:43,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 399 transitions, 7069 flow [2024-06-27 20:54:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 399 transitions, 6826 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-27 20:54:44,840 INFO L231 Difference]: Finished difference. Result has 223 places, 356 transitions, 5967 flow [2024-06-27 20:54:44,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5967, PETRI_PLACES=223, PETRI_TRANSITIONS=356} [2024-06-27 20:54:44,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-27 20:54:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 356 transitions, 5967 flow [2024-06-27 20:54:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:44,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:44,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:54:44,842 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:44,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 505759977, now seen corresponding path program 9 times [2024-06-27 20:54:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438985209] [2024-06-27 20:54:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438985209] [2024-06-27 20:54:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438985209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:45,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:45,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064098030] [2024-06-27 20:54:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:45,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:45,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:45,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:45,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 356 transitions, 5967 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:45,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:45,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:45,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:47,765 INFO L124 PetriNetUnfolderBase]: 5475/8889 cut-off events. [2024-06-27 20:54:47,765 INFO L125 PetriNetUnfolderBase]: For 389870/389877 co-relation queries the response was YES. [2024-06-27 20:54:47,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75244 conditions, 8889 events. 5475/8889 cut-off events. For 389870/389877 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59615 event pairs, 1759 based on Foata normal form. 18/8905 useless extension candidates. Maximal degree in co-relation 75133. Up to 8173 conditions per place. [2024-06-27 20:54:47,872 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 342 selfloop transitions, 53 changer transitions 0/399 dead transitions. [2024-06-27 20:54:47,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 399 transitions, 7028 flow [2024-06-27 20:54:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:54:47,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-27 20:54:47,874 INFO L175 Difference]: Start difference. First operand has 223 places, 356 transitions, 5967 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:54:47,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 399 transitions, 7028 flow [2024-06-27 20:54:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 399 transitions, 6888 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 20:54:48,889 INFO L231 Difference]: Finished difference. Result has 224 places, 357 transitions, 5993 flow [2024-06-27 20:54:48,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5827, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5993, PETRI_PLACES=224, PETRI_TRANSITIONS=357} [2024-06-27 20:54:48,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 20:54:48,889 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 357 transitions, 5993 flow [2024-06-27 20:54:48,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:48,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:48,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:54:48,891 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:48,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash 762260487, now seen corresponding path program 10 times [2024-06-27 20:54:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:48,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316849588] [2024-06-27 20:54:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:49,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316849588] [2024-06-27 20:54:49,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316849588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:49,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:49,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:54:49,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741834181] [2024-06-27 20:54:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:54:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:54:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:54:50,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:50,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 357 transitions, 5993 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:50,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:50,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:50,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:51,854 INFO L124 PetriNetUnfolderBase]: 5455/8857 cut-off events. [2024-06-27 20:54:51,855 INFO L125 PetriNetUnfolderBase]: For 388727/388734 co-relation queries the response was YES. [2024-06-27 20:54:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74540 conditions, 8857 events. 5455/8857 cut-off events. For 388727/388734 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 59253 event pairs, 1735 based on Foata normal form. 18/8873 useless extension candidates. Maximal degree in co-relation 74428. Up to 7867 conditions per place. [2024-06-27 20:54:51,959 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 315 selfloop transitions, 84 changer transitions 0/403 dead transitions. [2024-06-27 20:54:51,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 403 transitions, 7020 flow [2024-06-27 20:54:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:54:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:54:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 20:54:51,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:54:51,961 INFO L175 Difference]: Start difference. First operand has 224 places, 357 transitions, 5993 flow. Second operand 11 states and 200 transitions. [2024-06-27 20:54:51,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 403 transitions, 7020 flow [2024-06-27 20:54:53,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 403 transitions, 6866 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:54:53,022 INFO L231 Difference]: Finished difference. Result has 227 places, 357 transitions, 6015 flow [2024-06-27 20:54:53,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6015, PETRI_PLACES=227, PETRI_TRANSITIONS=357} [2024-06-27 20:54:53,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-27 20:54:53,023 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 357 transitions, 6015 flow [2024-06-27 20:54:53,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:53,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:53,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:53,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:54:53,024 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:53,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1661563129, now seen corresponding path program 1 times [2024-06-27 20:54:53,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:53,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752276030] [2024-06-27 20:54:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:53,550 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 20:54:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:53,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752276030] [2024-06-27 20:54:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752276030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:53,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:53,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12404848] [2024-06-27 20:54:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:53,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:53,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:53,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 357 transitions, 6015 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:53,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:53,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:53,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:55,265 INFO L124 PetriNetUnfolderBase]: 5443/8826 cut-off events. [2024-06-27 20:54:55,266 INFO L125 PetriNetUnfolderBase]: For 386269/386269 co-relation queries the response was YES. [2024-06-27 20:54:55,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74365 conditions, 8826 events. 5443/8826 cut-off events. For 386269/386269 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 58978 event pairs, 1767 based on Foata normal form. 4/8826 useless extension candidates. Maximal degree in co-relation 74252. Up to 8510 conditions per place. [2024-06-27 20:54:55,368 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 340 selfloop transitions, 27 changer transitions 0/371 dead transitions. [2024-06-27 20:54:55,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 371 transitions, 6875 flow [2024-06-27 20:54:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:54:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:54:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:54:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-27 20:54:55,369 INFO L175 Difference]: Start difference. First operand has 227 places, 357 transitions, 6015 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:54:55,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 371 transitions, 6875 flow [2024-06-27 20:54:56,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 371 transitions, 6661 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 20:54:56,250 INFO L231 Difference]: Finished difference. Result has 224 places, 360 transitions, 5940 flow [2024-06-27 20:54:56,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5940, PETRI_PLACES=224, PETRI_TRANSITIONS=360} [2024-06-27 20:54:56,251 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 20:54:56,251 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 360 transitions, 5940 flow [2024-06-27 20:54:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:56,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:56,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:54:56,251 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:56,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1839046003, now seen corresponding path program 1 times [2024-06-27 20:54:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120350251] [2024-06-27 20:54:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:56,781 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 20:54:56,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:56,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120350251] [2024-06-27 20:54:56,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120350251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:56,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:56,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:54:56,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821469376] [2024-06-27 20:54:56,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:56,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:54:56,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:56,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:54:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:54:56,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:54:56,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 360 transitions, 5940 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:56,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:56,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:54:56,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:58,487 INFO L124 PetriNetUnfolderBase]: 5464/8856 cut-off events. [2024-06-27 20:54:58,487 INFO L125 PetriNetUnfolderBase]: For 393400/393400 co-relation queries the response was YES. [2024-06-27 20:54:58,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75204 conditions, 8856 events. 5464/8856 cut-off events. For 393400/393400 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 59161 event pairs, 1739 based on Foata normal form. 1/8856 useless extension candidates. Maximal degree in co-relation 75090. Up to 8516 conditions per place. [2024-06-27 20:54:58,594 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-27 20:54:58,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 404 transitions, 7553 flow [2024-06-27 20:54:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:54:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:54:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:54:58,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 20:54:58,595 INFO L175 Difference]: Start difference. First operand has 224 places, 360 transitions, 5940 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:54:58,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 404 transitions, 7553 flow [2024-06-27 20:54:59,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 404 transitions, 7442 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:59,552 INFO L231 Difference]: Finished difference. Result has 230 places, 382 transitions, 6536 flow [2024-06-27 20:54:59,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6536, PETRI_PLACES=230, PETRI_TRANSITIONS=382} [2024-06-27 20:54:59,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-27 20:54:59,553 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 382 transitions, 6536 flow [2024-06-27 20:54:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:59,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:59,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:54:59,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:54:59,554 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:59,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash 297562899, now seen corresponding path program 1 times [2024-06-27 20:54:59,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:59,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58236513] [2024-06-27 20:54:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58236513] [2024-06-27 20:55:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58236513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:00,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:55:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692285045] [2024-06-27 20:55:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:00,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:55:00,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:00,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:55:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:55:00,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:00,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 382 transitions, 6536 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:00,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:00,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:00,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:02,095 INFO L124 PetriNetUnfolderBase]: 5663/9145 cut-off events. [2024-06-27 20:55:02,095 INFO L125 PetriNetUnfolderBase]: For 436003/436010 co-relation queries the response was YES. [2024-06-27 20:55:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79125 conditions, 9145 events. 5663/9145 cut-off events. For 436003/436010 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60937 event pairs, 1731 based on Foata normal form. 26/9169 useless extension candidates. Maximal degree in co-relation 79007. Up to 8623 conditions per place. [2024-06-27 20:55:02,196 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 360 selfloop transitions, 73 changer transitions 3/440 dead transitions. [2024-06-27 20:55:02,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 440 transitions, 8258 flow [2024-06-27 20:55:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:55:02,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:55:02,198 INFO L175 Difference]: Start difference. First operand has 230 places, 382 transitions, 6536 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:55:02,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 440 transitions, 8258 flow [2024-06-27 20:55:03,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 440 transitions, 8132 flow, removed 62 selfloop flow, removed 1 redundant places. [2024-06-27 20:55:03,198 INFO L231 Difference]: Finished difference. Result has 238 places, 415 transitions, 7263 flow [2024-06-27 20:55:03,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7263, PETRI_PLACES=238, PETRI_TRANSITIONS=415} [2024-06-27 20:55:03,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 20:55:03,199 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 415 transitions, 7263 flow [2024-06-27 20:55:03,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:03,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:03,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:55:03,199 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:03,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:03,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1838926033, now seen corresponding path program 2 times [2024-06-27 20:55:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:03,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097953095] [2024-06-27 20:55:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:03,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:03,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:03,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097953095] [2024-06-27 20:55:03,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097953095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:03,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:03,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:55:03,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14205753] [2024-06-27 20:55:03,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:03,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:55:03,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:55:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:55:03,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:03,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 415 transitions, 7263 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:03,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:03,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:05,778 INFO L124 PetriNetUnfolderBase]: 5608/9071 cut-off events. [2024-06-27 20:55:05,779 INFO L125 PetriNetUnfolderBase]: For 443248/443255 co-relation queries the response was YES. [2024-06-27 20:55:05,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79632 conditions, 9071 events. 5608/9071 cut-off events. For 443248/443255 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60567 event pairs, 1722 based on Foata normal form. 15/9084 useless extension candidates. Maximal degree in co-relation 79510. Up to 8580 conditions per place. [2024-06-27 20:55:05,879 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 359 selfloop transitions, 73 changer transitions 0/436 dead transitions. [2024-06-27 20:55:05,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 436 transitions, 8248 flow [2024-06-27 20:55:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:55:05,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 20:55:05,880 INFO L175 Difference]: Start difference. First operand has 238 places, 415 transitions, 7263 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:55:05,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 436 transitions, 8248 flow [2024-06-27 20:55:06,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 436 transitions, 7860 flow, removed 189 selfloop flow, removed 2 redundant places. [2024-06-27 20:55:06,979 INFO L231 Difference]: Finished difference. Result has 244 places, 415 transitions, 7048 flow [2024-06-27 20:55:06,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6875, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7048, PETRI_PLACES=244, PETRI_TRANSITIONS=415} [2024-06-27 20:55:06,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 20:55:06,980 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 415 transitions, 7048 flow [2024-06-27 20:55:06,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:06,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:06,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:06,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:55:06,981 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:06,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash 355959495, now seen corresponding path program 2 times [2024-06-27 20:55:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:06,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77091539] [2024-06-27 20:55:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:06,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:07,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77091539] [2024-06-27 20:55:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77091539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:07,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:07,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:55:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586502963] [2024-06-27 20:55:07,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:07,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:55:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:55:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:55:07,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:07,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 415 transitions, 7048 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:07,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:07,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:07,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:09,431 INFO L124 PetriNetUnfolderBase]: 5620/9095 cut-off events. [2024-06-27 20:55:09,431 INFO L125 PetriNetUnfolderBase]: For 445958/445965 co-relation queries the response was YES. [2024-06-27 20:55:09,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79119 conditions, 9095 events. 5620/9095 cut-off events. For 445958/445965 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 60762 event pairs, 1718 based on Foata normal form. 18/9111 useless extension candidates. Maximal degree in co-relation 78995. Up to 8598 conditions per place. [2024-06-27 20:55:09,526 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 371 selfloop transitions, 65 changer transitions 1/441 dead transitions. [2024-06-27 20:55:09,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 441 transitions, 8249 flow [2024-06-27 20:55:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:55:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:55:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:55:09,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 20:55:09,528 INFO L175 Difference]: Start difference. First operand has 244 places, 415 transitions, 7048 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:55:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 441 transitions, 8249 flow [2024-06-27 20:55:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 441 transitions, 8103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:10,658 INFO L231 Difference]: Finished difference. Result has 244 places, 422 transitions, 7203 flow [2024-06-27 20:55:10,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6902, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7203, PETRI_PLACES=244, PETRI_TRANSITIONS=422} [2024-06-27 20:55:10,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 20:55:10,659 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 422 transitions, 7203 flow [2024-06-27 20:55:10,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:10,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:10,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:10,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:55:10,660 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:10,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash 355966005, now seen corresponding path program 3 times [2024-06-27 20:55:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:10,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055757489] [2024-06-27 20:55:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055757489] [2024-06-27 20:55:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055757489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:11,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:55:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87159843] [2024-06-27 20:55:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:11,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:55:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:55:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:55:11,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:11,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 422 transitions, 7203 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:11,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:11,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:11,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:13,121 INFO L124 PetriNetUnfolderBase]: 5384/8655 cut-off events. [2024-06-27 20:55:13,121 INFO L125 PetriNetUnfolderBase]: For 431342/431349 co-relation queries the response was YES. [2024-06-27 20:55:13,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75587 conditions, 8655 events. 5384/8655 cut-off events. For 431342/431349 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 56787 event pairs, 1602 based on Foata normal form. 12/8665 useless extension candidates. Maximal degree in co-relation 75462. Up to 8375 conditions per place. [2024-06-27 20:55:13,246 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 401 selfloop transitions, 22 changer transitions 6/433 dead transitions. [2024-06-27 20:55:13,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 433 transitions, 8103 flow [2024-06-27 20:55:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:55:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:55:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:55:13,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:55:13,247 INFO L175 Difference]: Start difference. First operand has 244 places, 422 transitions, 7203 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:55:13,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 433 transitions, 8103 flow [2024-06-27 20:55:14,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 433 transitions, 8013 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:14,467 INFO L231 Difference]: Finished difference. Result has 246 places, 416 transitions, 7089 flow [2024-06-27 20:55:14,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7089, PETRI_PLACES=246, PETRI_TRANSITIONS=416} [2024-06-27 20:55:14,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-27 20:55:14,467 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 416 transitions, 7089 flow [2024-06-27 20:55:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:14,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:14,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:14,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:55:14,468 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:14,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 356205573, now seen corresponding path program 1 times [2024-06-27 20:55:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:14,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529086960] [2024-06-27 20:55:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:15,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:15,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529086960] [2024-06-27 20:55:15,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529086960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:15,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:15,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:55:15,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633775459] [2024-06-27 20:55:15,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:15,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:55:15,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:55:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:55:15,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:15,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 416 transitions, 7089 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:15,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:15,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:15,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:17,019 INFO L124 PetriNetUnfolderBase]: 5333/8583 cut-off events. [2024-06-27 20:55:17,020 INFO L125 PetriNetUnfolderBase]: For 445200/445200 co-relation queries the response was YES. [2024-06-27 20:55:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74843 conditions, 8583 events. 5333/8583 cut-off events. For 445200/445200 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 56098 event pairs, 1615 based on Foata normal form. 14/8593 useless extension candidates. Maximal degree in co-relation 74717. Up to 8227 conditions per place. [2024-06-27 20:55:17,126 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 401 selfloop transitions, 29 changer transitions 0/434 dead transitions. [2024-06-27 20:55:17,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 434 transitions, 8122 flow [2024-06-27 20:55:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:55:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:55:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:55:17,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:55:17,127 INFO L175 Difference]: Start difference. First operand has 246 places, 416 transitions, 7089 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:55:17,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 434 transitions, 8122 flow [2024-06-27 20:55:18,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 434 transitions, 8080 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:55:18,613 INFO L231 Difference]: Finished difference. Result has 249 places, 419 transitions, 7172 flow [2024-06-27 20:55:18,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7172, PETRI_PLACES=249, PETRI_TRANSITIONS=419} [2024-06-27 20:55:18,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 20:55:18,614 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 419 transitions, 7172 flow [2024-06-27 20:55:18,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:18,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:18,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:55:18,615 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:18,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash -420783380, now seen corresponding path program 1 times [2024-06-27 20:55:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598919373] [2024-06-27 20:55:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:19,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598919373] [2024-06-27 20:55:19,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598919373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:19,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:19,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847868499] [2024-06-27 20:55:19,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:19,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:19,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:19,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 419 transitions, 7172 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:19,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:19,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:19,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:22,263 INFO L124 PetriNetUnfolderBase]: 5936/9559 cut-off events. [2024-06-27 20:55:22,263 INFO L125 PetriNetUnfolderBase]: For 547726/547728 co-relation queries the response was YES. [2024-06-27 20:55:22,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83572 conditions, 9559 events. 5936/9559 cut-off events. For 547726/547728 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 63570 event pairs, 1620 based on Foata normal form. 58/9616 useless extension candidates. Maximal degree in co-relation 83445. Up to 8416 conditions per place. [2024-06-27 20:55:22,384 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 465 selfloop transitions, 78 changer transitions 0/547 dead transitions. [2024-06-27 20:55:22,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 547 transitions, 9943 flow [2024-06-27 20:55:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:55:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:55:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 267 transitions. [2024-06-27 20:55:22,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767857142857143 [2024-06-27 20:55:22,386 INFO L175 Difference]: Start difference. First operand has 249 places, 419 transitions, 7172 flow. Second operand 14 states and 267 transitions. [2024-06-27 20:55:22,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 547 transitions, 9943 flow [2024-06-27 20:55:24,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 547 transitions, 9816 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:24,092 INFO L231 Difference]: Finished difference. Result has 265 places, 474 transitions, 8277 flow [2024-06-27 20:55:24,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8277, PETRI_PLACES=265, PETRI_TRANSITIONS=474} [2024-06-27 20:55:24,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-27 20:55:24,093 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 474 transitions, 8277 flow [2024-06-27 20:55:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:24,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:24,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:24,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:55:24,093 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:24,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 35252992, now seen corresponding path program 2 times [2024-06-27 20:55:24,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:24,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742194005] [2024-06-27 20:55:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:24,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742194005] [2024-06-27 20:55:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742194005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:25,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:25,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881801687] [2024-06-27 20:55:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:25,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:25,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 474 transitions, 8277 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:25,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:27,809 INFO L124 PetriNetUnfolderBase]: 6575/10611 cut-off events. [2024-06-27 20:55:27,809 INFO L125 PetriNetUnfolderBase]: For 671270/671272 co-relation queries the response was YES. [2024-06-27 20:55:27,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95926 conditions, 10611 events. 6575/10611 cut-off events. For 671270/671272 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 71693 event pairs, 1580 based on Foata normal form. 60/10664 useless extension candidates. Maximal degree in co-relation 95792. Up to 8457 conditions per place. [2024-06-27 20:55:27,949 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 439 selfloop transitions, 98 changer transitions 0/541 dead transitions. [2024-06-27 20:55:27,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 541 transitions, 10549 flow [2024-06-27 20:55:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 20:55:27,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 20:55:27,950 INFO L175 Difference]: Start difference. First operand has 265 places, 474 transitions, 8277 flow. Second operand 10 states and 204 transitions. [2024-06-27 20:55:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 541 transitions, 10549 flow [2024-06-27 20:55:30,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 541 transitions, 10314 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:30,039 INFO L231 Difference]: Finished difference. Result has 274 places, 490 transitions, 8806 flow [2024-06-27 20:55:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8074, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8806, PETRI_PLACES=274, PETRI_TRANSITIONS=490} [2024-06-27 20:55:30,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-27 20:55:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 490 transitions, 8806 flow [2024-06-27 20:55:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:30,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:55:30,040 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:30,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1256204308, now seen corresponding path program 3 times [2024-06-27 20:55:30,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:30,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880454944] [2024-06-27 20:55:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:30,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:31,060 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 20:55:31,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:31,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880454944] [2024-06-27 20:55:31,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880454944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:31,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303189006] [2024-06-27 20:55:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:31,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:31,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 490 transitions, 8806 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:31,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:31,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:34,008 INFO L124 PetriNetUnfolderBase]: 7240/11666 cut-off events. [2024-06-27 20:55:34,008 INFO L125 PetriNetUnfolderBase]: For 792867/792869 co-relation queries the response was YES. [2024-06-27 20:55:34,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108375 conditions, 11666 events. 7240/11666 cut-off events. For 792867/792869 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 80422 event pairs, 2216 based on Foata normal form. 60/11719 useless extension candidates. Maximal degree in co-relation 108237. Up to 9978 conditions per place. [2024-06-27 20:55:34,169 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 424 selfloop transitions, 129 changer transitions 1/558 dead transitions. [2024-06-27 20:55:34,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 558 transitions, 11129 flow [2024-06-27 20:55:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 20:55:34,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-27 20:55:34,170 INFO L175 Difference]: Start difference. First operand has 274 places, 490 transitions, 8806 flow. Second operand 10 states and 203 transitions. [2024-06-27 20:55:34,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 558 transitions, 11129 flow [2024-06-27 20:55:36,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 558 transitions, 10890 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-27 20:55:36,699 INFO L231 Difference]: Finished difference. Result has 282 places, 509 transitions, 9423 flow [2024-06-27 20:55:36,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9423, PETRI_PLACES=282, PETRI_TRANSITIONS=509} [2024-06-27 20:55:36,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-27 20:55:36,700 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 509 transitions, 9423 flow [2024-06-27 20:55:36,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:36,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:36,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:36,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:55:36,701 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:36,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1251620338, now seen corresponding path program 4 times [2024-06-27 20:55:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:36,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610755884] [2024-06-27 20:55:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:37,983 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 20:55:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610755884] [2024-06-27 20:55:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610755884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:37,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:37,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745343881] [2024-06-27 20:55:37,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:38,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 509 transitions, 9423 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:38,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:38,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:41,077 INFO L124 PetriNetUnfolderBase]: 7460/12054 cut-off events. [2024-06-27 20:55:41,077 INFO L125 PetriNetUnfolderBase]: For 823802/823804 co-relation queries the response was YES. [2024-06-27 20:55:41,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112253 conditions, 12054 events. 7460/12054 cut-off events. For 823802/823804 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 83997 event pairs, 2455 based on Foata normal form. 60/12107 useless extension candidates. Maximal degree in co-relation 112111. Up to 10842 conditions per place. [2024-06-27 20:55:41,814 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 420 selfloop transitions, 134 changer transitions 0/558 dead transitions. [2024-06-27 20:55:41,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 558 transitions, 11366 flow [2024-06-27 20:55:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:55:41,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:55:41,816 INFO L175 Difference]: Start difference. First operand has 282 places, 509 transitions, 9423 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:55:41,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 558 transitions, 11366 flow [2024-06-27 20:55:44,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 558 transitions, 10987 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:44,653 INFO L231 Difference]: Finished difference. Result has 287 places, 515 transitions, 9583 flow [2024-06-27 20:55:44,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9056, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9583, PETRI_PLACES=287, PETRI_TRANSITIONS=515} [2024-06-27 20:55:44,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-27 20:55:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 515 transitions, 9583 flow [2024-06-27 20:55:44,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:44,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:44,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:55:44,654 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1830504428, now seen corresponding path program 5 times [2024-06-27 20:55:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529306438] [2024-06-27 20:55:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:45,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:45,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529306438] [2024-06-27 20:55:45,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529306438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:45,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:45,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77750132] [2024-06-27 20:55:45,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:45,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:45,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:45,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:45,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 515 transitions, 9583 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:45,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:45,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:45,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:49,743 INFO L124 PetriNetUnfolderBase]: 7731/12532 cut-off events. [2024-06-27 20:55:49,744 INFO L125 PetriNetUnfolderBase]: For 850516/850526 co-relation queries the response was YES. [2024-06-27 20:55:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115914 conditions, 12532 events. 7731/12532 cut-off events. For 850516/850526 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 88426 event pairs, 2608 based on Foata normal form. 56/12585 useless extension candidates. Maximal degree in co-relation 115770. Up to 11344 conditions per place. [2024-06-27 20:55:49,917 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 489 selfloop transitions, 79 changer transitions 0/572 dead transitions. [2024-06-27 20:55:49,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 572 transitions, 11408 flow [2024-06-27 20:55:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:55:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:55:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:55:49,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-06-27 20:55:49,918 INFO L175 Difference]: Start difference. First operand has 287 places, 515 transitions, 9583 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:55:49,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 572 transitions, 11408 flow [2024-06-27 20:55:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 572 transitions, 11041 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:52,778 INFO L231 Difference]: Finished difference. Result has 293 places, 521 transitions, 9640 flow [2024-06-27 20:55:52,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9218, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9640, PETRI_PLACES=293, PETRI_TRANSITIONS=521} [2024-06-27 20:55:52,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 20:55:52,778 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 521 transitions, 9640 flow [2024-06-27 20:55:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:52,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:52,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:52,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:55:52,779 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:52,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:52,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1648470700, now seen corresponding path program 6 times [2024-06-27 20:55:52,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:52,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755847626] [2024-06-27 20:55:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:52,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:53,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755847626] [2024-06-27 20:55:53,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755847626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:53,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:53,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:55:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926361410] [2024-06-27 20:55:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:53,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:55:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:55:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:55:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:55:54,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 521 transitions, 9640 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:54,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:54,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:55:54,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:58,178 INFO L124 PetriNetUnfolderBase]: 7848/12741 cut-off events. [2024-06-27 20:55:58,179 INFO L125 PetriNetUnfolderBase]: For 861905/861915 co-relation queries the response was YES. [2024-06-27 20:55:58,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116868 conditions, 12741 events. 7848/12741 cut-off events. For 861905/861915 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 90428 event pairs, 2688 based on Foata normal form. 56/12794 useless extension candidates. Maximal degree in co-relation 116720. Up to 11379 conditions per place. [2024-06-27 20:55:58,333 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 489 selfloop transitions, 94 changer transitions 0/587 dead transitions. [2024-06-27 20:55:58,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 587 transitions, 11572 flow [2024-06-27 20:55:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:55:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:55:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-27 20:55:58,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-27 20:55:58,336 INFO L175 Difference]: Start difference. First operand has 293 places, 521 transitions, 9640 flow. Second operand 12 states and 236 transitions. [2024-06-27 20:55:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 587 transitions, 11572 flow [2024-06-27 20:56:01,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 587 transitions, 11378 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:01,138 INFO L231 Difference]: Finished difference. Result has 300 places, 521 transitions, 9611 flow [2024-06-27 20:56:01,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9354, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9611, PETRI_PLACES=300, PETRI_TRANSITIONS=521} [2024-06-27 20:56:01,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 20:56:01,139 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 521 transitions, 9611 flow [2024-06-27 20:56:01,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:01,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:01,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:01,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:56:01,139 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:01,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1175940462, now seen corresponding path program 1 times [2024-06-27 20:56:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:01,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881694885] [2024-06-27 20:56:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:01,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881694885] [2024-06-27 20:56:01,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881694885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:01,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:01,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591000093] [2024-06-27 20:56:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:02,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:02,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 521 transitions, 9611 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:02,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:02,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:05,558 INFO L124 PetriNetUnfolderBase]: 7869/12766 cut-off events. [2024-06-27 20:56:05,558 INFO L125 PetriNetUnfolderBase]: For 818912/818914 co-relation queries the response was YES. [2024-06-27 20:56:05,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117440 conditions, 12766 events. 7869/12766 cut-off events. For 818912/818914 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 90463 event pairs, 3066 based on Foata normal form. 1/12766 useless extension candidates. Maximal degree in co-relation 117291. Up to 12353 conditions per place. [2024-06-27 20:56:05,933 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 493 selfloop transitions, 67 changer transitions 1/565 dead transitions. [2024-06-27 20:56:05,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 565 transitions, 11600 flow [2024-06-27 20:56:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:56:05,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-27 20:56:05,935 INFO L175 Difference]: Start difference. First operand has 300 places, 521 transitions, 9611 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:56:05,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 565 transitions, 11600 flow [2024-06-27 20:56:08,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 565 transitions, 11200 flow, removed 46 selfloop flow, removed 12 redundant places. [2024-06-27 20:56:08,205 INFO L231 Difference]: Finished difference. Result has 299 places, 536 transitions, 9842 flow [2024-06-27 20:56:08,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9215, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9842, PETRI_PLACES=299, PETRI_TRANSITIONS=536} [2024-06-27 20:56:08,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-27 20:56:08,206 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 536 transitions, 9842 flow [2024-06-27 20:56:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:08,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:08,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:56:08,206 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:08,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:08,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1175850252, now seen corresponding path program 2 times [2024-06-27 20:56:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070227303] [2024-06-27 20:56:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:09,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070227303] [2024-06-27 20:56:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070227303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332136837] [2024-06-27 20:56:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:09,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:09,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 536 transitions, 9842 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:09,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:09,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:09,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:12,748 INFO L124 PetriNetUnfolderBase]: 7844/12727 cut-off events. [2024-06-27 20:56:12,748 INFO L125 PetriNetUnfolderBase]: For 843525/843527 co-relation queries the response was YES. [2024-06-27 20:56:12,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117712 conditions, 12727 events. 7844/12727 cut-off events. For 843525/843527 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 90057 event pairs, 3067 based on Foata normal form. 1/12727 useless extension candidates. Maximal degree in co-relation 117561. Up to 12367 conditions per place. [2024-06-27 20:56:12,907 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 511 selfloop transitions, 46 changer transitions 0/561 dead transitions. [2024-06-27 20:56:12,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 561 transitions, 11303 flow [2024-06-27 20:56:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:56:12,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:56:12,912 INFO L175 Difference]: Start difference. First operand has 299 places, 536 transitions, 9842 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:56:12,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 561 transitions, 11303 flow [2024-06-27 20:56:15,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 561 transitions, 11115 flow, removed 93 selfloop flow, removed 1 redundant places. [2024-06-27 20:56:15,799 INFO L231 Difference]: Finished difference. Result has 306 places, 539 transitions, 9887 flow [2024-06-27 20:56:15,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9678, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9887, PETRI_PLACES=306, PETRI_TRANSITIONS=539} [2024-06-27 20:56:15,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-27 20:56:15,801 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 539 transitions, 9887 flow [2024-06-27 20:56:15,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:15,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:15,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:15,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:56:15,801 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:15,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1175850097, now seen corresponding path program 1 times [2024-06-27 20:56:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682797617] [2024-06-27 20:56:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:16,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682797617] [2024-06-27 20:56:16,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682797617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:16,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:16,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791946453] [2024-06-27 20:56:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:16,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:16,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 539 transitions, 9887 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:16,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:16,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:16,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:20,285 INFO L124 PetriNetUnfolderBase]: 7838/12715 cut-off events. [2024-06-27 20:56:20,286 INFO L125 PetriNetUnfolderBase]: For 861052/861054 co-relation queries the response was YES. [2024-06-27 20:56:20,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117742 conditions, 12715 events. 7838/12715 cut-off events. For 861052/861054 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 90040 event pairs, 3069 based on Foata normal form. 2/12716 useless extension candidates. Maximal degree in co-relation 117588. Up to 12365 conditions per place. [2024-06-27 20:56:20,459 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 514 selfloop transitions, 43 changer transitions 0/561 dead transitions. [2024-06-27 20:56:20,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 561 transitions, 11113 flow [2024-06-27 20:56:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:56:20,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:56:20,461 INFO L175 Difference]: Start difference. First operand has 306 places, 539 transitions, 9887 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:56:20,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 561 transitions, 11113 flow [2024-06-27 20:56:23,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 561 transitions, 10911 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:23,160 INFO L231 Difference]: Finished difference. Result has 309 places, 539 transitions, 9777 flow [2024-06-27 20:56:23,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9777, PETRI_PLACES=309, PETRI_TRANSITIONS=539} [2024-06-27 20:56:23,161 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-27 20:56:23,161 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 539 transitions, 9777 flow [2024-06-27 20:56:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:23,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:56:23,161 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1172131182, now seen corresponding path program 3 times [2024-06-27 20:56:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695454183] [2024-06-27 20:56:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695454183] [2024-06-27 20:56:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695454183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:24,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:24,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625782196] [2024-06-27 20:56:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:24,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:24,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:24,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 539 transitions, 9777 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:24,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:24,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:27,759 INFO L124 PetriNetUnfolderBase]: 7889/12787 cut-off events. [2024-06-27 20:56:27,760 INFO L125 PetriNetUnfolderBase]: For 891257/891267 co-relation queries the response was YES. [2024-06-27 20:56:27,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118534 conditions, 12787 events. 7889/12787 cut-off events. For 891257/891267 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 90337 event pairs, 2869 based on Foata normal form. 17/12801 useless extension candidates. Maximal degree in co-relation 118378. Up to 12214 conditions per place. [2024-06-27 20:56:27,929 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 477 selfloop transitions, 94 changer transitions 2/577 dead transitions. [2024-06-27 20:56:27,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 577 transitions, 11353 flow [2024-06-27 20:56:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:56:27,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-27 20:56:27,931 INFO L175 Difference]: Start difference. First operand has 309 places, 539 transitions, 9777 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:56:27,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 577 transitions, 11353 flow [2024-06-27 20:56:30,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 577 transitions, 11149 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:30,806 INFO L231 Difference]: Finished difference. Result has 312 places, 550 transitions, 10063 flow [2024-06-27 20:56:30,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9573, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10063, PETRI_PLACES=312, PETRI_TRANSITIONS=550} [2024-06-27 20:56:30,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-27 20:56:30,807 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 550 transitions, 10063 flow [2024-06-27 20:56:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:30,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:30,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:56:30,808 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:30,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1842537804, now seen corresponding path program 1 times [2024-06-27 20:56:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834359619] [2024-06-27 20:56:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:31,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834359619] [2024-06-27 20:56:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834359619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:31,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:31,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164176159] [2024-06-27 20:56:31,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:31,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:31,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 550 transitions, 10063 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:31,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:31,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:31,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand